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Unexpected state occurred for AsyncDataSetIterator: runnable died or no data available

I'm trying to build a neural network using deep learning4j framework, I get the following error :
java.lang.IllegalStateException: Unexpected state occurred for AsyncDataSetIterator: runnable died or no data available" this exception
Here is my code
package com.neuralnetwork;
import com.sliit.preprocessing.NormalizeDataset;
import com.sliit.ruleengine.RuleEngine;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.datavec.api.records.reader.SequenceRecordReader;
import org.datavec.api.records.reader.impl.csv.CSVSequenceRecordReader;
import org.deeplearning4j.eval.Evaluation;
import org.deeplearning4j.nn.api.OptimizationAlgorithm;
import org.deeplearning4j.nn.conf.MultiLayerConfiguration;
import org.deeplearning4j.nn.conf.NeuralNetConfiguration;
import org.deeplearning4j.nn.conf.Updater;
import org.deeplearning4j.nn.conf.layers.GravesLSTM;
import org.deeplearning4j.nn.conf.layers.RnnOutputLayer;
import org.deeplearning4j.nn.multilayer.MultiLayerNetwork;
import org.deeplearning4j.nn.weights.WeightInit;
import org.deeplearning4j.util.ModelSerializer;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.dataset.api.DataSet;
import org.nd4j.linalg.dataset.api.iterator.DataSetIterator;
import org.nd4j.linalg.factory.Nd4j;
import org.nd4j.linalg.lossfunctions.LossFunctions.LossFunction;
import weka.core.Instances;
import weka.core.converters.CSVLoader;
import weka.core.converters.CSVSaver;
import weka.filters.Filter;
import weka.filters.supervised.instance.StratifiedRemoveFolds;
import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
/**
* Deep Belif Neural Network to detect frauds.
*/
public class FraudDetectorDeepBeilefNN {
private static final Log log = LogFactory.getLog(FraudDetectorDeepBeilefNN.class);
public int outputNum = 4;
private int iterations = 5;
private int seed = 1234;
private MultiLayerNetwork model = null;
public int HIDDEN_LAYER_COUNT = 8;
public int numHiddenNodes = 21;
public int inputs = 41;
private String uploadDirectory = "D:/Data";
private ArrayList < Map < String, Double >> roc;
public FraudDetectorDeepBeilefNN() {
}
public void buildModel() {
System.out.println("Build model....");
iterations = outputNum + 1;
NeuralNetConfiguration.Builder builder = new NeuralNetConfiguration.Builder();
builder.iterations(iterations);
builder.learningRate(0.001);
// builder.momentum(0.01);
builder.optimizationAlgo(OptimizationAlgorithm.STOCHASTIC_GRADIENT_DESCENT);
builder.seed(seed);
builder.biasInit(1);
builder.regularization(true).l2(1e-5);
builder.updater(Updater.RMSPROP);
builder.weightInit(WeightInit.XAVIER);
NeuralNetConfiguration.ListBuilder list = builder.list();
for (int i = 0; i < HIDDEN_LAYER_COUNT; i++) {
GravesLSTM.Builder hiddenLayerBuilder = new GravesLSTM.Builder();
hiddenLayerBuilder.nIn(i == 0 ? inputs : numHiddenNodes);
hiddenLayerBuilder.nOut(numHiddenNodes);
hiddenLayerBuilder.activation("tanh");
list.layer(i, hiddenLayerBuilder.build());
}
RnnOutputLayer.Builder outputLayer = new RnnOutputLayer.Builder(LossFunction.MCXENT);
outputLayer.activation("softmax");
outputLayer.nIn(numHiddenNodes);
outputLayer.nOut(outputNum);
list.layer(HIDDEN_LAYER_COUNT, outputLayer.build());
list.pretrain(false);
list.backprop(true);
MultiLayerConfiguration configuration = list.build();
model = new MultiLayerNetwork(configuration);
model.init();
//model.setListeners(new ScoreIterationListener(1));
}
public String trainModel(String modelName, String filePath, int outputs, int inputsTot) throws NeuralException {
try {
System.out.println("Neural Network Training start");
loadSaveNN(modelName, false);
if (model == null) {
buildModel();
}
System.out.println("modal" + model);
System.out.println("file path " + filePath);
File fileGeneral = new File(filePath);
CSVLoader loader = new CSVLoader();
loader.setSource(fileGeneral);
Instances instances = loader.getDataSet();
instances.setClassIndex(instances.numAttributes() - 1);
StratifiedRemoveFolds stratified = new StratifiedRemoveFolds();
String[] options = new String[6];
options[0] = "-N";
options[1] = Integer.toString(5);
options[2] = "-F";
options[3] = Integer.toString(1);
options[4] = "-S";
options[5] = Integer.toString(1);
stratified.setOptions(options);
stratified.setInputFormat(instances);
stratified.setInvertSelection(false);
Instances testInstances = Filter.useFilter(instances, stratified);
stratified.setInvertSelection(true);
Instances trainInstances = Filter.useFilter(instances, stratified);
String directory = fileGeneral.getParent();
CSVSaver saver = new CSVSaver();
File trainFile = new File(directory + "/" + "normtrainadded.csv");
File testFile = new File(directory + "/" + "normtestadded.csv");
if (trainFile.exists()) {
trainFile.delete();
}
trainFile.createNewFile();
if (testFile.exists()) {
testFile.delete();
}
testFile.createNewFile();
saver.setFile(trainFile);
saver.setInstances(trainInstances);
saver.writeBatch();
saver = new CSVSaver();
saver.setFile(testFile);
saver.setInstances(testInstances);
saver.writeBatch();
SequenceRecordReader recordReader = new CSVSequenceRecordReader(0, ",");
recordReader.initialize(new org.datavec.api.split.FileSplit(trainFile));
SequenceRecordReader testReader = new CSVSequenceRecordReader(0, ",");
testReader.initialize(new org.datavec.api.split.FileSplit(testFile));
DataSetIterator iterator = new org.deeplearning4j.datasets.datavec.SequenceRecordReaderDataSetIterator(recordReader, 2, outputs, inputsTot, false);
DataSetIterator testIterator = new org.deeplearning4j.datasets.datavec.SequenceRecordReaderDataSetIterator(testReader, 2, outputs, inputsTot, false);
roc = new ArrayList < Map < String, Double >> ();
String statMsg = "";
Evaluation evaluation;
for (int i = 0; i < 100; i++) {
if (i % 2 == 0) {
model.fit(iterator);
evaluation = model.evaluate(testIterator);
} else {
model.fit(testIterator);
evaluation = model.evaluate(iterator);
}
Map < String, Double > map = new HashMap < String, Double > ();
Map < Integer, Integer > falsePositives = evaluation.falsePositives();
Map < Integer, Integer > trueNegatives = evaluation.trueNegatives();
Map < Integer, Integer > truePositives = evaluation.truePositives();
Map < Integer, Integer > falseNegatives = evaluation.falseNegatives();
double fpr = falsePositives.get(1) / (falsePositives.get(1) + trueNegatives.get(1));
double tpr = truePositives.get(1) / (truePositives.get(1) + falseNegatives.get(1));
map.put("FPR", fpr);
map.put("TPR", tpr);
roc.add(map);
statMsg = evaluation.stats();
iterator.reset();
testIterator.reset();
}
loadSaveNN(modelName, true);
System.out.println("ROC " + roc);
return statMsg;
} catch (Exception e) {
e.printStackTrace();
System.out.println("Error ocuured while building neural netowrk :" + e.getMessage());
throw new NeuralException(e.getLocalizedMessage(), e);
}
}
public boolean generateModel(String modelName) {
boolean status = false;
try {
loadSaveNN(modelName, true);
status = true;
} catch (Exception e) {
System.out.println("Error occurred:" + e.getLocalizedMessage());
}
return status;
}
private void loadSaveNN(String name, boolean save) {
File directory = new File(uploadDirectory);
File[] allNN = directory.listFiles();
boolean status = false;
try {
if (model == null && save) {
buildModel();
}
if (allNN != null && allNN.length > 0) {
for (File NN: allNN) {
String fnme = FilenameUtils.removeExtension(NN.getName());
if (name.equals(fnme)) {
status = true;
if (save) {
ModelSerializer.writeModel(model, NN, true);
System.out.println("Model Saved With Weights Successfully");
} else {
model = ModelSerializer.restoreMultiLayerNetwork(NN);
}
break;
}
}
}
if (!status && save) {
//File tempFIle = File.createTempFile(name,".zip",directory);
File tempFile = new File(directory.getAbsolutePath() + "/" + name + ".zip");
if (!tempFile.exists()) {
tempFile.createNewFile();
}
ModelSerializer.writeModel(model, tempFile, true);
}
} catch (IOException e) {
System.out.println("Error occurred:" + e.getMessage());
}
}
public String testModel(String modelName, String[] rawData, Map < Integer, String > map, int inputs, int outputs, String ruleModelSavePath) throws Exception {
String status = "";
String fpath = uploadDirectory;
FileWriter fwriter = new FileWriter(uploadDirectory + "original/insertdata.csv", true);
fwriter.write("\n");
fwriter.write(rawData[0]);
fwriter.close();
if (model == null) {
loadSaveNN(modelName, false);
}
NormalizeDataset norm = new NormalizeDataset(uploadDirectory + "original/insertdata.csv");
norm.updateStringValues(map);
norm.whiteningData();
norm.normalizeDataset();
BufferedReader bufferedReader = new BufferedReader(new FileReader(new File(uploadDirectory + "originalnorminsertdata.csv")));
String output = "";
String prevOutput = "";
while ((output = bufferedReader.readLine()) != null) {
prevOutput = output;
}
bufferedReader.close();
File readFile = new File(uploadDirectory + "normtest.csv");
if (readFile.exists()) {
readFile.delete();
}
readFile.createNewFile();
PrintWriter writer = new PrintWriter(readFile);
writer.println(prevOutput);
writer.flush();
writer.close();
SequenceRecordReader recordReader = new CSVSequenceRecordReader(0, ",");
recordReader.initialize(new org.datavec.api.split.FileSplit(new File(uploadDirectory + "normtest.csv")));
DataSetIterator iterator = new org.deeplearning4j.datasets.datavec.SequenceRecordReaderDataSetIterator(recordReader, 2, outputs, inputs, false);
INDArray outputArr = null;
while (iterator.hasNext()) {
DataSet ds = iterator.next();
INDArray provided = ds.getFeatureMatrix();
outputArr = model.rnnTimeStep(provided);
}
//INDArray finalOutput = Nd4j.argMax(outputArr,1);
double result = Double.parseDouble(Nd4j.argMax(outputArr, 1).toString());
if (result == 0.0) {
status = "Normal Transaction";
} else {
status = "Fraud Transaction, ";
bufferedReader = new BufferedReader(new FileReader(new File(uploadDirectory + "original/insertdata.csv")));
String heading = "";
heading = bufferedReader.readLine();
bufferedReader.close();
File ruleFile = new File(uploadDirectory + "normrules.csv");
if (ruleFile.exists()) {
ruleFile.delete();
}
ruleFile.createNewFile();
PrintWriter writeNew = new PrintWriter(ruleFile);
writeNew.println(heading);
writeNew.println(rawData[0]);
writeNew.flush();
writeNew.close();
RuleEngine engine = new RuleEngine(fpath + "original/insertdata.csv");
engine.geneateModel(ruleModelSavePath, false);
String finalStatus = status + "Attack Type:" + engine.predictionResult(uploadDirectory + "normrules.csv");
status = finalStatus;
}
return status;
}
public void setUploadDirectory(String uploadDirectory) {
this.uploadDirectory = uploadDirectory;
}
public static void main(String[] args) {
FraudDetectorDeepBeilefNN neural_network = new FraudDetectorDeepBeilefNN();
System.out.println("start=======================");
try {
neural_network.inputs = 4;
neural_network.numHiddenNodes = 3;
neural_network.HIDDEN_LAYER_COUNT = 2;
neural_network.outputNum = 2;
neural_network.buildModel();
String output = neural_network.trainModel("nn", "D:/Data/a.csv", 2, 4);
System.out.println(output);
} catch (Exception e) {
e.printStackTrace();
}
}
public ArrayList < Map < String, Double >> getRoc() {
return roc;
}
}
Here is the 1st few lines of my dataset :
length,caplen,hlen,version,output
60,60,6,0,normal
243,243,8,0,normal
60,60,6,0,neptune
60,60,6,0,neptune

Date and time not updating

My program uses dates to check when an engineer has visited a machine. The only problem with this is that the date does not remain up to date. The date and time that the machine displays is the exact time that the machine was started. Not when the button was clicked. Any assistance would be helpful.
Code:
package com.perisic.beds.peripherals;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.lang.management.ManagementFactory;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Vector;
import javax.swing.*;
import org.apache.xmlrpc.WebServer;
import org.apache.xmlrpc.XmlRpcClient;
import com.perisic.beds.machine.CustomerPanel;
/**
* A Simple Graphical User Interface for the Recycling Machine.
* #author Group M
*
*/
public class RecyclingGUI extends JFrame implements ActionListener {
/**
*
*/
private static final long serialVersionUID = -5772727482959492839L;
//CustomerPanel myCustomerPanel = new CustomerPanel(new Display());
Display myDisplay = new Display();
ReceiptPrinter printer = new ReceiptPrinter();
ReceiptPrinter printer2 = new ReceiptPrinter();
CustomerPanel myCustomerPanel = new CustomerPanel(myDisplay);
CustomerPanel machineScreen = new CustomerPanel(printer2);
CustomerPanel theConsole = new CustomerPanel(printer);
CustomerPanel thePanel = new CustomerPanel(myDisplay);
private String storedPasswd = "123"; // needs some thinking with encryption etc
private String storedCookie = null; // some random string to be used for authentication
private String sessionCookie = "";
private int numberOfVisits;
DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm");
Date date = new Date();
Date storedDate = date;
/**
* Web service to provide number of items in the machine.
* #param myCookie
* #return
*/
public int numberOfItems(String myCookie) {
if( storedCookie == null ) {
return -1;
} else if( myCookie.equals(storedCookie)) {
return myCustomerPanel.getNumberOfItems();
}
else {
return -1;
}
}
public int empty (String myCookie){
if(storedCookie == null){
return -1;
}else if(myCookie.equals(storedCookie)){
return myCustomerPanel.empty();
}else{
return -1;
}
}
/**
* Web service to authenticate the user with proper password.
* #param passwd
* #return
*/
public String login(String passwd) {
if( passwd.equals(storedPasswd)) {
storedCookie = "MC"+Math.random();
System.out.println("Engineer has logged in on: " + dateFormat.format(date));
storedDate = date;
numberOfVisits ++;
return storedCookie;
} else {
return "Incorrect Password";
}
}
public String visits(String myCookie){
if(numberOfVisits == 0){
return "Engineer has not visited this machine";
}else if(myCookie.equals(storedCookie)){
for(int i = 0; i < numberOfVisits; i++){
System.out.println("Engineer has visited on these dates: " + dateFormat.format(storedDate));
}
return storedCookie;
}else{
return "Engineer has visited on these date: " + dateFormat.format(storedDate);
}
}
/**
* Web service to logout from the system.
*/
public String logout(String myCookie ) {
if( storedCookie == null ) {
return "(no cookie set)";
} else if( myCookie.equals(storedCookie)) {
System.out.println("Engineer has logged out on: " + dateFormat.format(date));
storedCookie = null;
return "cookie deleted: OK";
}
else {
return "could not delete anything; authentication missing";
}
}
public static final String SUN_JAVA_COMMAND = "sun.java.command";
//This method is used to restart the application.
//It uses code that basically stores all of the necessary code it will need to successfully restart the application.
//Rather then just using System.exit(0) which, by itself would simply close the entire application.
//Using dispose() and new RecyclingGUI also doesn't work as it does not reload the JPanel upon restarting.
public void restartApplication(Runnable runBeforeRestart) throws IOException{
try {
String java = System.getProperty("java.home") + "/bin/java";
List<String> vmArguments = ManagementFactory.getRuntimeMXBean().getInputArguments();
StringBuffer vmArgsOneLine = new StringBuffer();
for (String arg : vmArguments) {
if (!arg.contains("-agentlib")) {
vmArgsOneLine.append(arg);
vmArgsOneLine.append(" ");
}
}
final StringBuffer cmd = new StringBuffer("\"" + java + "\" " + vmArgsOneLine);
String[] mainCommand = System.getProperty(SUN_JAVA_COMMAND).split(" ");
if (mainCommand[0].endsWith(".jar")) {
cmd.append("-jar " + new File(mainCommand[0]).getPath());
} else {
cmd.append("-cp \"" + System.getProperty("java.class.path") + "\" " + mainCommand[0]);
}
for (int i = 1; i < mainCommand.length; i++) {
cmd.append(" ");
cmd.append(mainCommand[i]);
}
Runtime.getRuntime().addShutdownHook(new Thread() {
#Override
public void run() {
try {
Runtime.getRuntime().exec(cmd.toString());
} catch (IOException e) {
e.printStackTrace();
}
}
});
if (runBeforeRestart!= null) {
runBeforeRestart.run();
}
System.exit(0);
} catch (Exception e) {
throw new IOException("Error while trying to restart the machine", e);
}
}
public void actionPerformed(ActionEvent e) {
/* Differentiate between the different buttons pressed and initiate appropriate
* actions
*/
try{
XmlRpcClient server = new XmlRpcClient("http://localhost:100");
//This code allows the engineer to login to the machine and when they do it reveals new buttons that only the engineer can use.
if (e.getSource().equals(login)){
String message;
boolean loginSuccess = false;
while(loginSuccess == false && (message = JOptionPane.showInputDialog("Login please"))!= null){
Vector parms1 = new Vector();
parms1.add(message);
Object result3 = server.execute("recycling.login", parms1);
String loginRequest = result3.toString();
if(loginRequest.equals("Wrong password")){
System.out.println("Wrong Password. Try Again!");
} else {
sessionCookie = loginRequest;
System.out.println("You are now logged in");
login.setVisible(false);
logout.setVisible(true);
reset.setVisible(true);
empty.setVisible(true);
items.setVisible(true);
loginSuccess = true;
}
}
}else if(e.getSource().equals(visits)){
Vector params = new Vector();
params.add(sessionCookie);
Object result = server.execute("recycling.visits", params);
System.out.println(result);
//This logs the engineer out of the machine and hides some of the buttons
}else if( e.getSource().equals(logout)) {
Vector params = new Vector();
params.add(sessionCookie);
Object result = server.execute("recycling.logout", params );
System.out.println("Logout: "+result);
reset.setVisible(false);
empty.setVisible(false);
items.setVisible(false);
login.setVisible(true);
logout.setVisible(false);
//This code tells the engineer how many items are currently in the machine.
}else if(e.getSource().equals(items)){
Vector params = new Vector();
params.add(sessionCookie);
Object result = server.execute("recycling.numberOfItems", params );
int resultInt = new Integer(result.toString());
if( resultInt == -1 ) {
System.out.println("Sorry no authentication there.");
} else {
System.out.println("There are "+resultInt+" items in the machine");
}
//This if statement empties all items that have been put into the machine thus far and sets the item number property to 0
}else if(e.getSource().equals(empty)){
Vector params = new Vector();
params.add(sessionCookie);
Object result = server.execute("recycling.empty", params);
int resultInt = new Integer(result.toString());
if(resultInt == -1){
System.out.println("Sorry no authentication there.");
}else{
System.out.println("The machine has been emptied.");
}
//This method coded above is called here.
}else if(e.getSource().equals(reset)){
restartApplication(null);
}else if(e.getSource().equals(slot1)) {
myCustomerPanel.itemReceived(1);
}else if(e.getSource().equals(slot2)) {
myCustomerPanel.itemReceived(2);
}else if(e.getSource().equals(slot3)) {
myCustomerPanel.itemReceived(3);
}else if(e.getSource().equals(slot4)) {
myCustomerPanel.itemReceived(4);
}else if(e.getSource().equals(receipt)) {
myCustomerPanel.printReceipt();
}else if(e.getSource().equals(display)) {
this.myCustomerPanel = thePanel;
}else if(e.getSource().equals(console)){
myCustomerPanel = theConsole;
}else if(e.getSource().equals(onScreen)){
//once this button is clicked all output is linked back into the GUI
myCustomerPanel = machineScreen;
redirectSystemStreams();
}
}catch (Exception exception) {
System.err.println("JavaClient: " + exception);
}
// System.out.println("Received: e.getActionCommand()="+e.getActionCommand()+
// " e.getSource()="+e.getSource().toString() );
}
//This Adds the controls (buttons) to the GUI
JButton slot1 = new JButton("Can");
JButton slot2 = new JButton("Bottle");
JButton slot3 = new JButton("Crate");
JButton slot4 = new JButton("Paper Bag");
JButton receipt = new JButton("Print Receipt");
JButton login = new JButton("Login");
JButton logout = new JButton("Logout");
JButton reset = new JButton("Reset");
JButton empty = new JButton("Empty");
JButton items = new JButton("#Items");
JButton visits = new JButton("visits");
JTextArea textArea = new JTextArea(20,30);
JScrollPane scroll = new JScrollPane(textArea);
JButton display = new JButton("Print to Display");
JButton console = new JButton("Print to GUI/Console");
JButton onScreen = new JButton("Show On Screen");
/** This creates the GUI using the controls above and
* adds the actions and listeners. this area of code also
* Contains the panel settings for size and some behaviours.
*/
public RecyclingGUI() {
super();
setSize(500, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
panel.add(slot1);
panel.add(slot2);
panel.add(slot3);
panel.add(slot4);
slot1.addActionListener(this);
slot2.addActionListener(this);
slot3.addActionListener(this);
slot4.addActionListener(this);
panel.add(receipt);
receipt.addActionListener(this);
panel.add(display);
display.addActionListener(this);
panel.add(console);
console.addActionListener(this);
panel.add(onScreen);
onScreen.addActionListener(this);
/**Text Area controls for size, font style, font size
* the text area also has a scroll bar just in case the user enters
* a large number of items
*/
panel.add(scroll);
textArea.setLineWrap(true);
textArea.setEditable(false);
textArea.setFont(new Font("Ariel",Font.PLAIN, 14));
scroll.setPreferredSize(new Dimension(450, 450));
scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
panel.add(login);
login.addActionListener(this);
panel.add(logout);
logout.setVisible(false);
logout.addActionListener(this);
panel.add(reset);
reset.setVisible(false);
reset.addActionListener(this);
panel.add(items);
items.setVisible(false);
items.addActionListener(this);
panel.add(empty);
empty.setVisible(false);
empty.addActionListener(this);
panel.add(visits);
visits.addActionListener(this);
getContentPane().add(panel);
panel.repaint();
}
public static void main(String [] args ) {
RecyclingGUI myGUI = new RecyclingGUI();
myGUI.setVisible(true);
try {
System.out.println("Starting the Recycling Server...");
WebServer server = new WebServer(100);
server.addHandler("recycling", myGUI);
server.start();
} catch (Exception exception) {
System.err.println("JavaServer: " + exception);
}
}
/** This is the code that redirects where the code is displayed
* from the console to the textArea of the GUI. it does this by
* creating a new set of output streams (for text and errors) which
* are set as default when the redirectSystemStream method is called.
* (from a previous piece of work i did in my FDg, source = from a tutorial)
*/
public void updateTextArea(final String text) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
textArea.append(text);
}
});
}
public void redirectSystemStreams() {
OutputStream out = new OutputStream() {
#Override
public void write(int b) throws IOException {
updateTextArea(String.valueOf((char) b));
}
#Override
public void write(byte[] b, int off, int len) throws IOException {
updateTextArea(new String(b, off, len));
}
#Override
public void write(byte[] b) throws IOException {
write(b, 0, b.length);
}
};
System.setOut(new PrintStream(out, true));
System.setErr(new PrintStream(out, true));
}
public void print(String str) {
System.out.println(str);
}
}

You never re-initialize date, you're just updating storedDate with the existing date in login. You could change this line in login
storedDate = date;
to
storedDate = new Date();
And then (I think) you can remove date.

Date does not keep a persistent current time. Date is backed by a long that is set when the Date is instantiated and is never changed.
You can either make a new Date() in your logon method, so it would be created when the user logs on, or just use System.currentTimeMillis() to get the current time as a long.

How to display each instance of a user logging into a server with a button click?

I have been tasked with creating a recycling machine server which a engineer can log into empty, reset, etc. Each time the engineer logs into a machine it creates a string that says "Engineer has logged in on this (date)". I need to create a JButton that prints out each instance of this string being written.
So when pressed it prints out something like this:
"Engineer visited this machine on 01/01/2016"
"Engineer visited this machine on 02/01/2016"
"Engineer visited this machine on 05/04/2016"
The log in function is working and uses stored cookies to figure out if the user has input the correct information. I am however unable to figure out how to print out this summary of visits via one button click. Any help would be appreciated.
Code:
package com.perisic.beds.peripherals;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.lang.management.ManagementFactory;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Vector;
import javax.swing.*;
import org.apache.xmlrpc.WebServer;
import org.apache.xmlrpc.XmlRpcClient;
import com.perisic.beds.machine.CustomerPanel;
/**
* A Simple Graphical User Interface for the Recycling Machine.
* #author Group M
*
*/
public class RecyclingGUI extends JFrame implements ActionListener {
/**
*
*/
private static final long serialVersionUID = -5772727482959492839L;
//CustomerPanel myCustomerPanel = new CustomerPanel(new Display());
Display myDisplay = new Display();
ReceiptPrinter printer = new ReceiptPrinter();
ReceiptPrinter printer2 = new ReceiptPrinter();
CustomerPanel myCustomerPanel = new CustomerPanel(myDisplay);
CustomerPanel machineScreen = new CustomerPanel(printer2);
CustomerPanel theConsole = new CustomerPanel(printer);
CustomerPanel thePanel = new CustomerPanel(myDisplay);
private String storedPasswd = "123"; // needs some thinking with encryption etc
private String storedCookie = null; // some random string to be used for authentication
private String sessionCookie = "";
private int numberOfVisits = 0;
DateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm");
Date date = new Date();
Date storedDate = new Date();
/**
* Web service to provide number of items in the machine.
* #param myCookie
* #return
*/
public int numberOfItems(String myCookie) {
if( storedCookie == null ) {
return -1;
} else if( myCookie.equals(storedCookie)) {
return myCustomerPanel.getNumberOfItems();
}
else {
return -1;
}
}
public int empty (String myCookie){
if(storedCookie == null){
return -1;
}else if(myCookie.equals(storedCookie)){
return myCustomerPanel.empty();
}else{
return -1;
}
}
/**
* Web service to authenticate the user with proper password.
* #param passwd
* #return
*/
public String login(String passwd) {
if( passwd.equals(storedPasswd)) {
storedCookie = "MC"+Math.random();
System.out.println("Engineer has logged in on: " + dateFormat.format(date));
storedDate = date;
numberOfVisits ++;
return storedCookie;
} else {
return "Incorrect Password";
}
}
public String visits(String myCookie){
if(numberOfVisits == 0){
return "Engineer has not visited this machine";
}else if(myCookie.equals(storedCookie)){
for(int i = 0; i < numberOfVisits; i++){
System.out.println("Engineer has visited on these dates: " + dateFormat.format(storedDate));
}
return storedCookie;
}else{
return "Engineer has visited on these date: " + dateFormat.format(storedDate);
}
}
/**
* Web service to logout from the system.
*/
public String logout(String myCookie ) {
if( storedCookie == null ) {
return "(no cookie set)";
} else if( myCookie.equals(storedCookie)) {
System.out.println("Engineer has logged out on: " + dateFormat.format(date));
storedCookie = null;
return "cookie deleted: OK";
}
else {
return "could not delete anything; authentication missing";
}
}
public static final String SUN_JAVA_COMMAND = "sun.java.command";
//This method is used to restart the application.
//It uses code that basically stores all of the necessary code it will need to successfully restart the application.
//Rather then just using System.exit(0) which, by itself would simply close the entire application.
//Using dispose() and new RecyclingGUI also doesn't work as it does not reload the JPanel upon restarting.
public void restartApplication(Runnable runBeforeRestart) throws IOException{
try {
String java = System.getProperty("java.home") + "/bin/java";
List<String> vmArguments = ManagementFactory.getRuntimeMXBean().getInputArguments();
StringBuffer vmArgsOneLine = new StringBuffer();
for (String arg : vmArguments) {
if (!arg.contains("-agentlib")) {
vmArgsOneLine.append(arg);
vmArgsOneLine.append(" ");
}
}
final StringBuffer cmd = new StringBuffer("\"" + java + "\" " + vmArgsOneLine);
String[] mainCommand = System.getProperty(SUN_JAVA_COMMAND).split(" ");
if (mainCommand[0].endsWith(".jar")) {
cmd.append("-jar " + new File(mainCommand[0]).getPath());
} else {
cmd.append("-cp \"" + System.getProperty("java.class.path") + "\" " + mainCommand[0]);
}
for (int i = 1; i < mainCommand.length; i++) {
cmd.append(" ");
cmd.append(mainCommand[i]);
}
Runtime.getRuntime().addShutdownHook(new Thread() {
#Override
public void run() {
try {
Runtime.getRuntime().exec(cmd.toString());
} catch (IOException e) {
e.printStackTrace();
}
}
});
if (runBeforeRestart!= null) {
runBeforeRestart.run();
}
System.exit(0);
} catch (Exception e) {
throw new IOException("Error while trying to restart the machine", e);
}
}
public void actionPerformed(ActionEvent e) {
/* Differentiate between the different buttons pressed and initiate appropriate
* actions
*/
try{
XmlRpcClient server = new XmlRpcClient("http://localhost:100");
//This code allows the engineer to login to the machine and when they do it reveals new buttons that only the engineer can use.
if (e.getSource().equals(login)){
String message;
boolean loginSuccess = false;
while(loginSuccess == false && (message = JOptionPane.showInputDialog("Login please"))!= null){
Vector parms1 = new Vector();
parms1.add(message);
Object result3 = server.execute("recycling.login", parms1);
String loginRequest = result3.toString();
if(loginRequest.equals("Wrong password")){
System.out.println("Wrong Password. Try Again!");
} else {
sessionCookie = loginRequest;
System.out.println("You are now logged in");
login.setVisible(false);
logout.setVisible(true);
reset.setVisible(true);
empty.setVisible(true);
items.setVisible(true);
loginSuccess = true;
}
}
}else if(e.getSource().equals(visits)){
Vector params = new Vector();
params.add(sessionCookie);
Object result = server.execute("recycling.visits", params);
System.out.println(result);
//This logs the engineer out of the machine and hides some of the buttons
}else if( e.getSource().equals(logout)) {
Vector params = new Vector();
params.add(sessionCookie);
Object result = server.execute("recycling.logout", params );
System.out.println("Logout: "+result);
reset.setVisible(false);
empty.setVisible(false);
items.setVisible(false);
login.setVisible(true);
logout.setVisible(false);
//This code tells the engineer how many items are currently in the machine.
}else if(e.getSource().equals(items)){
Vector params = new Vector();
params.add(sessionCookie);
Object result = server.execute("recycling.numberOfItems", params );
int resultInt = new Integer(result.toString());
if( resultInt == -1 ) {
System.out.println("Sorry no authentication there.");
} else {
System.out.println("There are "+resultInt+" items in the machine");
}
//This if statement empties all items that have been put into the machine thus far and sets the item number property to 0
}else if(e.getSource().equals(empty)){
Vector params = new Vector();
params.add(sessionCookie);
Object result = server.execute("recycling.empty", params);
int resultInt = new Integer(result.toString());
if(resultInt == -1){
System.out.println("Sorry no authentication there.");
}else{
System.out.println("The machine has been emptied.");
}
//This method coded above is called here.
}else if(e.getSource().equals(reset)){
restartApplication(null);
}else if(e.getSource().equals(slot1)) {
myCustomerPanel.itemReceived(1);
}else if(e.getSource().equals(slot2)) {
myCustomerPanel.itemReceived(2);
}else if(e.getSource().equals(slot3)) {
myCustomerPanel.itemReceived(3);
}else if(e.getSource().equals(slot4)) {
myCustomerPanel.itemReceived(4);
}else if(e.getSource().equals(receipt)) {
myCustomerPanel.printReceipt();
}else if(e.getSource().equals(display)) {
this.myCustomerPanel = thePanel;
}else if(e.getSource().equals(console)){
myCustomerPanel = theConsole;
}else if(e.getSource().equals(onScreen)){
//once this button is clicked all output is linked back into the GUI
myCustomerPanel = machineScreen;
redirectSystemStreams();
}
}catch (Exception exception) {
System.err.println("JavaClient: " + exception);
}
// System.out.println("Received: e.getActionCommand()="+e.getActionCommand()+
// " e.getSource()="+e.getSource().toString() );
}
//This Adds the controls (buttons) to the GUI
JButton slot1 = new JButton("Can");
JButton slot2 = new JButton("Bottle");
JButton slot3 = new JButton("Crate");
JButton slot4 = new JButton("Paper Bag");
JButton receipt = new JButton("Print Receipt");
JButton login = new JButton("Login");
JButton logout = new JButton("Logout");
JButton reset = new JButton("Reset");
JButton empty = new JButton("Empty");
JButton items = new JButton("#Items");
JButton visits = new JButton("visits");
JTextArea textArea = new JTextArea(20,30);
JScrollPane scroll = new JScrollPane(textArea);
JButton display = new JButton("Print to Display");
JButton console = new JButton("Print to GUI/Console");
JButton onScreen = new JButton("Show On Screen");
/** This creates the GUI using the controls above and
* adds the actions and listeners. this area of code also
* Contains the panel settings for size and some behaviours.
*/
public RecyclingGUI() {
super();
setSize(500, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
panel.add(slot1);
panel.add(slot2);
panel.add(slot3);
panel.add(slot4);
slot1.addActionListener(this);
slot2.addActionListener(this);
slot3.addActionListener(this);
slot4.addActionListener(this);
panel.add(receipt);
receipt.addActionListener(this);
panel.add(display);
display.addActionListener(this);
panel.add(console);
console.addActionListener(this);
panel.add(onScreen);
onScreen.addActionListener(this);
/**Text Area controls for size, font style, font size
* the text area also has a scroll bar just in case the user enters
* a large number of items
*/
panel.add(scroll);
textArea.setLineWrap(true);
textArea.setEditable(false);
textArea.setFont(new Font("Ariel",Font.PLAIN, 14));
scroll.setPreferredSize(new Dimension(450, 450));
scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
panel.add(login);
login.addActionListener(this);
panel.add(logout);
logout.setVisible(false);
logout.addActionListener(this);
panel.add(reset);
reset.setVisible(false);
reset.addActionListener(this);
panel.add(items);
items.setVisible(false);
items.addActionListener(this);
panel.add(empty);
empty.setVisible(false);
empty.addActionListener(this);
panel.add(visits);
visits.addActionListener(this);
getContentPane().add(panel);
panel.repaint();
}
public static void main(String [] args ) {
RecyclingGUI myGUI = new RecyclingGUI();
myGUI.setVisible(true);
try {
System.out.println("Starting the Recycling Server...");
WebServer server = new WebServer(100);
server.addHandler("recycling", myGUI);
server.start();
} catch (Exception exception) {
System.err.println("JavaServer: " + exception);
}
}
/** This is the code that redirects where the code is displayed
* from the console to the textArea of the GUI. it does this by
* creating a new set of output streams (for text and errors) which
* are set as default when the redirectSystemStream method is called.
* (from a previous piece of work i did in my FDg, source = from a tutorial)
*/
public void updateTextArea(final String text) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
textArea.append(text);
}
});
}
public void redirectSystemStreams() {
OutputStream out = new OutputStream() {
#Override
public void write(int b) throws IOException {
updateTextArea(String.valueOf((char) b));
}
#Override
public void write(byte[] b, int off, int len) throws IOException {
updateTextArea(new String(b, off, len));
}
#Override
public void write(byte[] b) throws IOException {
write(b, 0, b.length);
}
};
System.setOut(new PrintStream(out, true));
System.setErr(new PrintStream(out, true));
}
public void print(String str) {
System.out.println(str);
}
}

So after working around with the code for a while I discovered that there was one simple piece of code that was causing it to not display the information I wanted.
private int numberOfVisits = 0;
Defining the int as a 0 to begin with caused the code to reset the value of the int every time I pressed the "visits" button.
Removing the 0 fixed this issue.
private int numberOfVisits;

Why is my thread not ending?

Im pretty new to Java and to thread-programming especially. This code is mostly out of a pretty old book (2001) with samples and examples for a search-engine.
But its just not working
Now i don't know if i am making a mistake or if the author made it or if there are incompatibilities with different versions of java...i really have no clue! The oddest thing about it is that it works 1 out of 100 times ...
After hours of debugging i would appreciate any help!
SearchEngine.java:
import java.util.Vector;
import parsing.SourceElement;
import parsing.WebParserWrapper;
import query.Filter;
public class SearchEngine implements Runnable {
private Vector linkHistory = new Vector();
private int currentLink;
private String beginAt = null;
private SearchHandler searchHandler = null;
private boolean searchInProgress = false;
private boolean stopPending = false;
boolean firstTime = true;
public boolean searchInProgress() {
return searchInProgress;
}
public boolean stopPending() {
return stopPending;
}
#SuppressWarnings("unchecked")
public void followLinks(String url) {
if (stopPending)
return;
try {
boolean drillDown = false;
WebParserWrapper webParser = new WebParserWrapper();
Vector sortedElements = webParser.getElements(url, "", "WITHGET");
Vector contentElements = Filter.getFilteredElements(sortedElements, Filter.CONTENT, "matches", "*");
for (int i = 0; i < contentElements.size(); i++) {
SourceElement thisElement = (SourceElement) contentElements.elementAt(i);
String thisKey = (String) thisElement.getKey();
String thisContent = (String) thisElement.getContent();
boolean goodHit = searchHandler.handleElement(url, thisKey, thisContent);
if (goodHit) {
drillDown = true;
}
}
System.out.println(url + " -- DrillDown " + ((drillDown) ? "positive" : "negative"));
if (drillDown) {
Vector linkElements = Filter.getFilteredElements(sortedElements, Filter.KEY, "matches",
"*a[*].#href[*]");
for (int i = 0; i < linkElements.size(); i++) {
SourceElement thisElement = (SourceElement) linkElements.elementAt(i);
String thisContent = (String) thisElement.getContent();
if (!linkHistory.contains(thisContent)) {
linkHistory.add(thisContent);
System.out.println("Collected: " + thisContent);
}
}
}
}
catch (Exception e) {}
if (currentLink < linkHistory.size()) {
String nextLink = (String) linkHistory.elementAt(currentLink++);
if (nextLink != null) {
followLinks(nextLink);
}
}
}
public boolean startSearch(String url, SearchHandler searchHandler) {
if (searchInProgress)
return false;
beginAt = url;
this.searchHandler = searchHandler;
this.linkHistory = new Vector();
this.currentLink = 0;
Thread searchThread = new Thread(this);
searchThread.start();
return true;
}
public void stopSearch() {
stopPending = true;
}
#Override
public void run() {
searchInProgress = true;
followLinks(beginAt);
searchInProgress = false;
stopPending = false;
}
}
SimpleSearcher.java
import java.util.Enumeration;
import java.util.Hashtable;
public class SimpleSearcher implements SearchHandler {
private SearchEngine searchEngine;
private String keyword;
private String startURL;
private Hashtable hits = new Hashtable();
public boolean handleElement(String url, String key, String content) {
boolean goodHit = false;
int keywordCount = 0;
int pos = -1;
while ((pos = content.toLowerCase().indexOf(keyword, pos + 1)) >= 0){
keywordCount++;
}
if (keywordCount > 0) {
Integer count = (Integer) hits.get(url);
if (count == null){
hits.put(url, new Integer(1));
}
else {
hits.remove(url);
hits.put(url, new Integer(count.intValue() + keywordCount));
}
goodHit = true;
}
if (hits.size() >= 3)
searchEngine.stopSearch();
return goodHit;
}
public Hashtable search(String startURL, String keyword) {
searchEngine = new SearchEngine();
this.startURL = startURL;
this.keyword = keyword;
searchEngine.startSearch(startURL, this);
try {Thread.sleep(1000);}catch (Exception e){e.printStackTrace();}
while (searchEngine.searchInProgress());
return this.hits;
}
public static void main(String[] args) {
SimpleSearcher searcher = new SimpleSearcher();
String url = "http://www.nzz.ch/";
String compareWord = "der";
Hashtable hits = searcher.search(url, compareWord);
System.out.println("URLs=" + hits.size());
for (Enumeration keys = hits.keys(); keys.hasMoreElements();) {
String thisKey = (String) keys.nextElement();
int thisCount = ((Integer) hits.get(thisKey)).intValue();
System.out.println(thisCount + " hits at " + thisKey);
}
}
}
SearchHandler.java
public interface SearchHandler {
public boolean handleElement(String url, String key, String content);
}

Why is my quizzcount doubling its value

I'm having a problem with this code in that the quizzcount variable is not outputting the correct value, it doubles the value.
I found a work around by diving the quizzcount by 2 and it works but i would really like to figure out why its doubling the value.
So for example, without dividing quizzcount by 2, if the user gets 7 out of the 10 questions correct the messagedialog will display that the user got 14 out of 10 correct.
What is causing this?
Thanks guys, any help would be appreciated.
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InvalidClassException;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.io.*;
import java.util.*;
import java.awt.* ;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.awt.Image;
import java.lang.*;
public class MathFiles extends JFrame implements ActionListener
{
private ObjectOutputStream toFile;
private String name;
private boolean open;
private static String response;
private static int menuOption = 0;
private static int numberOfMaths = 0;
private FileInputStream fis;
private ObjectInputStream fromFile;
Math aMath = null;
private int quizcount =0;
String checkbutton = "";
private static int tracker =1;
int count = 0;
int fimage =0;
JRadioButton questA, questB, questC, questD, questE;
ButtonGroup questGroup;
JPanel questPanel;
JLabel question;
JPanel questionPanel;
JTextField resultText;
JLabel resultLabl;
JPanel resultPanel;
JButton nextButton;
JPanel quizPanel;
ImageIcon image;
JLabel imageLabl;
JPanel imagePanel;
JTextArea questionText;
JScrollPane scrollPane;
Random rand;
/** #param fileName is the desired name for the binary file. */
public MathFiles()
{
setTitle( "Math Quiz Competition" );
rand = new Random();
toFile = null;
//tracker = rand.nextInt(5)+1;
tracker = 1;
name = "Quiz"+tracker+".txt";
open = false;
//openFile(); //Use only when creating file
//writeMathsToTextFile(name);
setLayout( new FlowLayout() );
inputFile();
beginquiz();
showquestions();
setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
} // end MathFiles constructor
/** Writes all Maths from a text file and writes them to a binary file.
#param fileName the text file */
public void writeMathsToTextFile(String fileName)
{
Scanner inputFile = null;
Math nextMath = null;
String question_num;
String question;
String answera;
String answerb;
String answerc;
String answerd;
String answer_cor;
String file_name;
String SENTINEL ="DONE";
try
{
inputFile = new Scanner(new File(fileName));
}
catch(FileNotFoundException e)
{
System.out.println("Text file " + fileName + " not found.");
System.exit(0);
}
Scanner keyboard = new Scanner(System.in);
System.out.print("Question number: ");
question_num = keyboard.nextLine();
while (!question_num.equalsIgnoreCase(SENTINEL))
{
System.out.print("Question: ");
question = keyboard.nextLine();
System.out.print("Answer A: ");
answera = keyboard.nextLine();
System.out.print("Answer B: ");
answerb = keyboard.nextLine();
System.out.print("Answer C: ");
answerc = keyboard.nextLine();
System.out.print("Answer D: ");
answerd = keyboard.nextLine();
fimage = rand.nextInt(30)+1;
file_name = "image"+fimage+".gif";
System.out.print(file_name);
System.out.print("Correct Answer: ");
answer_cor = keyboard.nextLine();
nextMath = new Math(question_num, question, answera, answerb,
answerc, answerd, answer_cor, file_name);
writeAnObject(nextMath);
numberOfMaths++;
System.out.print("\nQuestion number: ");
question_num = keyboard.nextLine();
} // end while
System.out.println("successfully created = " + name);
} // end readMathsFromTextFile
/** Opens the binary file for output. */
public void openFile()
{
try
{
FileOutputStream fos = new FileOutputStream(name);
toFile = new ObjectOutputStream(fos);
open = true;
}
catch (FileNotFoundException e)
{
System.out.println("Cannot find, create, or open the file " + name);
System.out.println(e.getMessage());
open = false;
}
catch (IOException e)
{
System.out.println("Error opening the file " + name);
System.out.println(e.getMessage());
open = false;
}
//System.out.println("successfully opened = " + name);
} // end openFile
/** Writes the given object to the binary file. */
public void writeAnObject(Serializable anObject)
{
try
{
if (open)
toFile.writeObject(anObject);
}
catch (InvalidClassException e)
{
System.out.println("Serialization problem in writeAnObject.");
System.out.println(e.getMessage());
System.exit(0);
}
catch (IOException e)
{
System.out.println("Error writing the file " + name);
System.out.println(e.getMessage());
System.exit(0);
}
} // end writeAnObject
public void result()
{
System.out.println("Your score is");
}
public void inputFile()
{
try
{
fromFile = new ObjectInputStream(new FileInputStream(name));
}
catch(StreamCorruptedException e)
{
System.out.println("Error in input stream: " + name);
System.out.println(e.getMessage());
System.exit(0);
}
catch(IOException e)
{
System.out.println("Error reading input stream: " + name);
System.out.println(e.getMessage());
System.exit(0);
}
} // end displayFile
/** Closes the binary file. */
public void closeFile()
{
System.out.println("closed name = " + name);
try
{
toFile.close();
open = false;
}
catch (IOException e)
{
System.out.println("Error closing the file " + name);
System.out.println(e.getMessage());
System.exit(0);
}
} // end closeFile
/** #return the fileís name as a string */
public String getName()
{
return name;
} // end getName
/** #return true if the file is open */
public boolean isOpen()
{
return open;
} // end isOpen
public void beginquiz()
{
try
{
aMath = (Math)fromFile.readObject();
}
catch (ClassNotFoundException e)
{
System.out.println("The class Math is not found.");
System.out.println(e.getMessage());
System.exit(0);
}
catch(StreamCorruptedException e)
{
System.out.println("Error in input stream: " + name);
System.out.println(e.getMessage());
System.exit(0);
}
catch(IOException e)
{
System.out.println("Error reading input stream: " + name);
System.out.println(e.getMessage());
System.exit(0);
}
}
void showquestions()
{
//question group
/*question = new JLabel();
question.setText(aMath.getquestion());
question.setFont(new Font("Arial", Font.BOLD, 20));
question.setForeground(Color.BLUE);
questionPanel = new JPanel();
questionPanel.add( question );*/
questionText = new JTextArea(5,20);
questionText.setWrapStyleWord(true);
questionText.setLineWrap(true);
questionText.setText(aMath.getquestion());
questionText.setFont(new Font("Arial", Font.BOLD, 20));
questionText.setForeground(Color.BLUE);
questionPanel = new JPanel();
questionPanel.setLayout(new BoxLayout(questionPanel, BoxLayout.PAGE_AXIS));
questionPanel.add( questionText );
// quest group
questA = new JRadioButton(aMath.getanswera(), false );
questB = new JRadioButton(aMath.getanswerb(), false );
questC = new JRadioButton(aMath.getanswerc(), false );
questD = new JRadioButton(aMath.getanswerd(), false );
questGroup = new ButtonGroup();
questGroup.add( questA );
questGroup.add( questB );
questGroup.add( questC );
questGroup.add( questD );
questPanel = new JPanel();
questPanel.setLayout( new BoxLayout( questPanel, BoxLayout.Y_AXIS ) );
questPanel.add( new JLabel("Choose the Correct Answer") );
questPanel.add( questA );
questPanel.add( questB );
questPanel.add( questC );
questPanel.add( questD );
// result panel
//resultText = new JTextField(20);
//resultText.setEditable( false );
//resultLabl = new JLabel("Result");
//resultPanel = new JPanel();
//resultPanel.add( resultLabl );
//resultPanel.add( resultText );
//button
nextButton = new JButton("Next");
quizPanel = new JPanel();
quizPanel.add(nextButton);
//Image image1 = new ImageIcon("image/image1.gif").getImage();
image = new ImageIcon("image1.gif");
imageLabl=new JLabel(image);
imagePanel = new JPanel();
imagePanel.add(imageLabl);
// frame: use default layout manager
add( imagePanel);
add( questionPanel);
add( questPanel);
//add( resultPanel);
questA.setActionCommand(aMath.getanswera());
questB.setActionCommand(aMath.getanswerb());
questC.setActionCommand(aMath.getanswerc());
questD.setActionCommand(aMath.getanswerd());
questA.addActionListener(this);
questB.addActionListener(this);
questC.addActionListener(this);
questD.addActionListener(this);
nextButton.setActionCommand( "next" ); // set the command
// register the buttonDemo frame
// as the listener for both Buttons.
nextButton.addActionListener( this );
add(quizPanel);
}
public void actionPerformed( ActionEvent evt)
{
//evt.getActionCommand() = aMath.getanswer_cor();
if (questA.isSelected()&&
aMath.getanswera().equalsIgnoreCase(aMath.getanswer_cor().trim()))
quizcount++;
if (questB.isSelected()&&
aMath.getanswerb().equalsIgnoreCase(aMath.getanswer_cor().trim()))
quizcount++;
if (questC.isSelected()&&
aMath.getanswerc().equalsIgnoreCase(aMath.getanswer_cor().trim()))
quizcount++;
if (questD.isSelected()&&
aMath.getanswerd().equalsIgnoreCase(aMath.getanswer_cor().trim()))
quizcount++;
if(questA.isSelected() || questB.isSelected() || questC.isSelected() || questD.isSelected())
if ( evt.getActionCommand().equals( "next" ))
{
try
{
aMath = (Math)fromFile.readObject();
questionText.setText(aMath.getquestion());
questA.setText(aMath.getanswera());
questB.setText(aMath.getanswerb());
questC.setText(aMath.getanswerc());
questD.setText(aMath.getanswerd());
imageLabl.setIcon(new ImageIcon(aMath.getfile()));
questGroup.clearSelection();
repaint();
}
catch (ClassNotFoundException e)
{
System.out.println("The class Math is not found.");
System.out.println(e.getMessage());
System.exit(0);
}
catch(StreamCorruptedException e)
{
System.out.println("Error in input stream: " + name);
System.out.println(e.getMessage());
System.exit(0);
}
catch(IOException e)
{
if (count<=0)
count = 0;
else
count--;
JOptionPane.showMessageDialog(null,"Your score is "+quizcount/2 +" out of 10");
try{
Thread.sleep(2000);
System.exit(0);
}catch (InterruptedException em) { }
}
}
}
public static void main ( String[] args )
{
MathFiles mat = new MathFiles();
mat.setSize( 450, 550 );
mat.setLocationRelativeTo(null);
mat.setResizable( false );
mat.setVisible( true );
}
} // end MathFiles
class Math implements java.io.Serializable
{
private String question_num;
private String question;
private String answera;
private String answerb;
private String answerc;
private String answerd;
private String answer_cor;
private String file_name;
public Math(String quesno, String quest, String ansa, String ansb, String ansc,
String ansd, String ans_cor, String file)
{
question_num = quesno;
question = quest;
answera = ansa;
answerb = ansb;
answerc = ansc;
answerd = ansd;
answer_cor = ans_cor;
file_name = file;
}
public void setquestion(String lName)
{
question = lName;
} // end setquestion
public void setquestion_num(String fName)
{
question_num = fName;
} // end setquestion_num
public void setanswera(String add)
{
answera = add;
} // end setanswera
public void setanswerb(String cty)
{
answerb = cty;
} // end setanswerb
public void setanswerc(String st)
{
answerc = st;
} // end setanswerc
public void setanswerd(String z)
{
answerd = z;
} // end setanswerd
public void setanswer_cor(String phn)
{
answer_cor = phn;
} // end setanswer_corr
public String getquestion_num()
{
return question_num;
} // end getquestion_num
/** #return the question */
public String getquestion()
{
return question;
} // end getquestion
/** #return the answera*/
public String getanswera()
{
return answera;
} // end getanswera
/** #return the answerb */
public String getanswerb()
{
return answerb;
} // end getanswerb
public String getanswerc()
{
return answerc;
} // end getanswerc
public String getanswerd()
{
return answerd;
} // end getanswerd
public String getanswer_cor()
{
return answer_cor;
} // end getanswer_corr
public String getfile()
{
return file_name;
} // end getanswer_corr
/** #return the Math information */
public String toString()
{
String myMath = getquestion_num() + " " + getquestion() + "\n";
myMath += getanswera() + "\n";
myMath += getanswerb() + " " + getanswerc() + " " + getanswerd() + "\n";
myMath += getanswer_cor() + "\n";
myMath += getfile() + "\n";
return myMath;
} // end toString
} // end Math

It looks like your problem is that you've registered ActionListeners on the radio buttons. This means the event fires when you select an answer as well as clicking the 'next' button. With that in mind it should be obvious why your score is doubling itself.
As far as I can tell you don't need ActionListeners for the radio buttons. You should only be checking the answer when the user has indicated they are done with their selection. That the score is exactly doubling itself also suggests that you basically haven't tested the program besides naively selecting a radio button and clicking 'next'. Before commenting out the lines where you add the listeners to the radio buttons, try changing your answer. Open the program, select the correct answer, then select an incorrect answer, then select the correct answer again and click 'next'. See what happens.
This kind of error can also be easily found with a debugger. Just insert a breakpoint inside actionPerformed and it will be obvious it's being called by more than one action.