I'm using Java to get the map between volume label and drive letter and the code is like below:
import java.io.File;
import javax.swing.filechooser.FileSystemView;
public class Test{
public void listMap(){
File[] files = File.listRoots();
System.out.println("The map between volume label and drive is: " );
for(File file: files){
String theMap = FileSystemView.getFileSystemView().getSystemDisplayName(file);
System.out.println(theMap);
}
}
public static void main(String[] args) {
Test test = new Test();
test.listMap();
}
}
I have built above code into a exe file on windows through exe4j. It works fine when you run it directly.
However, when I use Teamcity build agent to launch the exe, the exception below will be thrown when the FileSystemView.getFileSystemView().getSystemDisplayName(file) is called.
java.lang.NullPointerException
at sun.awt.shell.Win32ShellFolder2$1.call(Unknown Source)
at sun.awt.shell.Win32ShellFolder2$1.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Any comment is appreciated.
Related
I have a javafx project in eclipse ready to run. I have a client and a server.
I have tried to run server and client in eclipse and everything works fine, but when I exported to runnable jars, one to server and one to client, the server jar works fine, but the client throws exception: Exception in thread "main" java.lang.reflect.InvocationTargetException
although it works fine before exporting in eclipse.
Server and Client are both javafx applications that start with GUI.
ClientLauncher.java:
package client;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.stage.Stage;
public class ClientLauncher extends Application {
public GCMClient gcmClient;
private String host = "localhost";
private int port = 5555;
private double xOffset = 0;
private double yOffset = 0;
public static void main(String[] args) {
launch();
}
#Override
public void start(Stage PrimaryStage) throws Exception {
System.out.println("Client Connection Established");
Parent root = FXMLLoader.load(getClass().getResource("/sources/ServerLogin.fxml"));
root.setOnMousePressed(new EventHandler<MouseEvent>() {
public void handle(MouseEvent event) {
xOffset = event.getSceneX();
yOffset = event.getSceneY();
}
});
root.setOnMouseDragged(new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
PrimaryStage.setX(event.getScreenX() - xOffset);
PrimaryStage.setY(event.getScreenY() - yOffset);
}
});
Scene scene = new Scene(root);
PrimaryStage.setScene(scene);
PrimaryStage.show();
}
}
The exception I get:
Exception in thread "main" java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(Unknown Source)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: Location is required.
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml/javafx.fxml.FXMLLoader.load(Unknown Source)
at client.ClientLauncher.start(ClientLauncher.java:33)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(Unknown Source)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$11(Unknown Source)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$9(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(Unknown Source)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(Unknown Source)
Solved:
I have misspelled ServerLogin.fxml in
Parent root = FXMLLoader.load(getClass().getResource("/sources/ServerLogin.fxml"));
Which is named "ServerLogIn.fxml" in my case.
It appears that the name of the fxml is case sensitive in runnable jar, but It's not in eclipse. That's why it worked fine in eclipse and didn't work in jar.
I am trying to make a simple RMI execution engine to run on my local machine so that other java programs can easily run code on a second processor. (In the future this will be expanded to allow more processors).
The server starts up just fine, and the client appears to locate the registry ok, but when it tries to call the execution engine (and passes it a parameter) it causes a ClassNotFoundException.
I recognize that this is similar to many other questions on stack overflow, but as far as I can tell, all the other ones have to do with the client not being able to download the server's classes rather than the server not being able to download the client's classes.
Here is my code (copied almost exactly from this sample code):
RMIServer eclipse project
ComputeEngine Interface:
package interfaces;
import java.io.Serializable;
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface ComputeEngine_IF extends Remote {
/**
* #param task The task object specifying the computation to be performed
* #return
* #throws RemoteException
*/
<T extends Serializable> T compute(TaskWithoutInput<T> task) throws RemoteException;
}
TaskWithoutInput interface:
package interfaces;
import java.io.Serializable;
public interface TaskWithoutInput<T> extends Serializable {
public T compute();
}
ComputeEngine Class:
package server;
import interfaces.ComputeEngine_IF;
import interfaces.TaskWithoutInput;
import java.io.Serializable;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.UnicastRemoteObject;
public class ComputeEngine implements ComputeEngine_IF{
public ComputeEngine() {
super();
}
#Override
public <T extends Serializable> T compute(TaskWithoutInput<T> task) throws RemoteException {
return task.compute();
}
public static void main(String[] args) {
if(System.getSecurityManager() == null) {
System.setSecurityManager(new SecurityManager());
}
try {
String name = "Compute";
ComputeEngine_IF engine = new ComputeEngine();
ComputeEngine_IF stub = (ComputeEngine_IF) UnicastRemoteObject.exportObject(engine, 0);
Registry registry = LocateRegistry.createRegistry(1099);
registry.rebind(name, stub);
System.out.println("Registry bound!");
}
catch (Exception e) {
System.err.println("ComputeEngine exception:");
e.printStackTrace();
}
}
}
RMIClient eclipse project
GetAnswerTask class
package client;
import interfaces.TaskWithoutInput;
public class GetAnswerTask implements TaskWithoutInput<Integer> {
private static final long serialVersionUID = 1L;
#Override
public Integer compute() {
return Integer.valueOf(42);
}
}
Client class
package client;
import interfaces.ComputeEngine_IF;
import interfaces.TaskWithoutInput;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
public class RmiClientExample {
public static void main(String args[]) {
if(System.getSecurityManager() == null) {
System.setSecurityManager(new SecurityManager());
}
try {
String name = "Compute";
Registry registry = LocateRegistry.getRegistry("localhost");
ComputeEngine_IF comp = (ComputeEngine_IF) registry.lookup(name);
TaskWithoutInput<Integer> getAnswer = new GetAnswerTask();
Integer answer = comp.compute(getAnswer);
System.out.println("Answer: " + answer);
}
catch (Exception e) {
System.err.println("RmiClientExample exception:");
e.printStackTrace();
}
}
}
Both projects contain an identical security policy file (in RMIServer it is called server.policy and in RMIClient it is called client.policy)
grant {
permission java.security.AllPermission;
};
I will, of course, restrict the permissions more once I get this working.
Building/Running
Since the code is pretty close to something I copied out of an example, my guess is that the code is right, or at least close, but that my mistake is in compiling/running the code. The example wasn't written for eclipse, so I don't have exact instructions.
The first thing I did was use eclipse's jar export wizard to jar the interface package into Interfaces.jar which I just placed in my RMIServer folder.
Then I run ComputeEngine with the following defines:
-Djava.rmi.server.codebase=file:/c:/Users/nate/workspace/RMIServer/Interfaces.jar
-Djava.rmi.server.hostname=localhost
-Djava.security.policy=c:/Users/nate/workspace/RMIServer/src/server.policy
The compute engine seems to run just find and outputs the print statement in the code.
I then run the client with the defines:
-Djava.rmi.server.codebase=file:/c:/Users/nate/workspace/RMIClient/bin/
-Djava.security.policy=c:/Users/nate/workspace/RMIClient/src/client.policy
And I get the following error message:
RmiClientExample exception:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: client.GetAnswerTask
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source)
at com.sun.proxy.$Proxy0.compute(Unknown Source)
at client.RmiClientExample.main(RmiClientExample.java:24)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: client.GetAnswerTask
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: client.GetAnswerTask
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.rmi.server.LoaderHandler$Loader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClassForName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadClass(Unknown Source)
at sun.rmi.server.MarshalInputStream.resolveClass(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at sun.rmi.server.UnicastRef.unmarshalValue(Unknown Source)
at sun.rmi.server.UnicastServerRef.unmarshalParametersUnchecked(Unknown Source)
at sun.rmi.server.UnicastServerRef.unmarshalParameters(Unknown Source)
... 13 more
Any thoughts on what I might be doing wrong?
GetAnswerTask implements Serializable, so it will be serialized to the server when you call ComputeEngine_IF.compute(). So GetAnswerTask needs to be available at the server, on its classpath, and it isn't.
For those still struggling with oracle RMI tutorial, whose server doesn't download serializable class from given client's codebase (and stubbornly seeks class in its own codebase) - try to add
-Djava.rmi.server.useCodebaseOnly=false
to server's arguments
I've been trying to understand what the issue is exactly, but whatever I do doesn't seem to work.
I have a text file that lists names along with numbers, seperated by a colon.
An example of this is:
Betty Ross:52
Angie Scotts:29
Michael Rosen:72
The list is very long and comprises over 10,000 lines.
public class PeopleIds {
public static int UNDEFINED_ID = -1;
private static HashMap<String, Integer> people;
public static void initialize() {
people = new HashMap<String, Integer>();
System.out.println(new File("res/ids/people_ids.txt").exists());
try {
Files.lines(Paths.get("res/ids/people_ids.txt")).forEach(s -> {
people.put(s.replaceAll(":.*", "").trim(), Integer.parseInt(s.replaceAll(".*:", "")));
});
} catch (IOException e) {
System.out.println("Unable to read specified file.");
e.printStackTrace();
}
}
public static int getId(final String name) {
final Integer id = people.get(name);
return id != null ? id : UNDEFINED_ID;
}
}
I call the initialize method from a GUIController class:
public class GUIController implements Initializable {
#FXML
private TableView<PersonData> personTable;
#FXML
private TableColumn<PersonData, String> name;
#FXML
private TableColumn<PersonData, Integer> limit;
#FXML
private TextField searchInput;
#FXML
private ImageView personIcon;
private Image undefinedIcon;
private PersonIcon icon;
private ObservableList<PersonData> data;
#Override
public void initialize(URL location, ResourceBundle resources) {
PeopleIds.initialize();
undefinedIcon = new Image(getClass().getResourceAsStream("/ids/no.png"));
name.setCellValueFactory(new PropertyValueFactory<PersonData, String>("name"));
limit.setCellValueFactory(new PropertyValueFactory<PersonData, Integer>("limit"));
data = PriceData.getData();
personTable.setPeople(data);
searchInput.textProperty().addListener((ov, oldValue, newValue) -> {
final String input = searchInput.getText();
if (input.length() == 0) return;
searchInput.setText(input.substring(0, 1).toUpperCase() + input.substring(1).toLowerCase());
filterSearch();
});
}
}
When I call it from this class with PeopleIds.initialize(), an exception is thrown, telling me that there was an exception in the application start method.
Here is what was logged in its entirety:
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(Unknown Source)
at com.sun.javafx.application.LauncherImpl.launchApplication(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(Unknown Source)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$156(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: javafx.fxml.LoadException:
/C:/Confidential/bin/base/PersonGUI.fxml
at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.load(Unknown Source)
at base.PersonGUI.start(PersonGUI.java:13)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$163(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$176(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$174(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$175(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$149(Unknown Source)
... 1 more
Caused by: java.io.UncheckedIOException: java.nio.charset.MalformedInputException: Input length = 1
at java.io.BufferedReader$1.hasNext(Unknown Source)
at java.util.Iterator.forEachRemaining(Unknown Source)
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source)
at java.util.stream.ReferencePipeline$Head.forEach(Unknown Source)
at base.PeopleIds.initialize(PeopleIds.java:17)
at base.GUIController.initialize(GUIController.java:36)
... 18 more
Caused by: java.nio.charset.MalformedInputException: Input length = 1
at java.nio.charset.CoderResult.throwException(Unknown Source)
at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
at sun.nio.cs.StreamDecoder.read(Unknown Source)
at java.io.InputStreamReader.read(Unknown Source)
at java.io.BufferedReader.fill(Unknown Source)
at java.io.BufferedReader.readLine(Unknown Source)
at java.io.BufferedReader.readLine(Unknown Source)
... 24 more
Exception running application base.PersonGUI
I'm not sure what is going on here? I've looked into it and people have said to move the fxml file (the one that is used to format the content and is linked with the GUIController to the same package as the Main class, however it already is.
I've been wrestling with this issue for days to no avail. Do any of you have past experiences with this issue? If so, how did you resolve it? Thanks a lot.
If there is an Exception while the file is being read, not when opening the file, an unchecked exception is thrown for the Files.lines stream operation (Stream.forEach doesn't have a throws clause).
This happens here
Files.lines(Paths.get("res/ids/people_ids.txt")).forEach(s -> {
people.put(s.replaceAll(":.*", "").trim(), Integer.parseInt(s.replaceAll(".*:", "")));
});
, which you can easily see in the stacktrace:
Caused by: java.io.UncheckedIOException: java.nio.charset.MalformedInputException: Input length = 1
(This is caused by the wrong Charset being used, see Files.readAllBytes vs Files.lines getting MalformedInputException )
You don't catch this kind of exception with your catch clause:
} catch (IOException e) {
You need to use
} catch (Exception e) {
to catch the unchecked exceptions too.
I've been messing around with ClassLoaders in java recently, trying to run my automation script code which uses dynamic loading of classes and geting ClassNotFoundException.
##MyCode
package com.actitime5.frameworkengine;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;
import com.gmail5.Testcases.LoginLogout;
import org.junit.runner.JUnitCore;
public class Init {
public static void main(String args[]) throws Exception
{
Init in=new Init();
String url=in.getConfigValue("url");
ExcelLibrary lib=new ExcelLibrary();
JUnitCore core = new JUnitCore();
int numberofTestcases=lib.getRowCont("Scenario");
System.out.println(numberofTestcases);
for(int i=1;i<=numberofTestcases;i++)
{String status=lib.getExcelData("Scenario", i, 1);
if(status.equals("yes"))
{String scriptnam=lib.getExcelData("Scenario", i, 0);
System.out.println("Sheet Name"+" "+scriptnam);
Class scriptToRun= Class.forName("com.gmail5.Testcases."+scriptnam);
core.run(scriptToRun);
}
}}
##Errors that i am getting :
1
Sheet Name LoginLogout
Exception in thread "main" java.lang.ClassNotFoundException:com.gmail5.Testcases.LoginLogout
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at com.gmail5.frameworkengine.Init.main(Init.java:24)
The class which I am trying to load is available in package: com.gmail5.Testcases.*;,but still it throws exception
I think your class name has trailing whitespace. Try trim()ming it off before attempting to load the class.
You can confirm this by replacing
System.out.println("Sheet Name"+" "+scriptnam);
with
System.out.println("Sheet Name"+" '"+scriptnam+"'");
I expect this will print out something like the following:
Sheet Name 'LoginLogout '
When I clicked 'edit' to edit your question, I could see there was trailing whitespace after the class name in the stack trace and in your Sheet Name message. (I didn't change anything in your question: I just used the Edit function to see the raw text of your question, and then clicked Cancel.)
So recently, I have been trying to make my own Mario game (for myself, possibly to show my other friends). Games include buttons. When I click on a button in other games, it plays a sound. I would love to add that feature to my game. The problem is, it doesn't play. My source code is:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class JButtonClick {
JButton test = new JButton("Click Me!");
JPanel panel = new JPanel();
public void playSound(String soundName)
{
try
{
AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(new File(soundName).getAbsoluteFile());
Clip clip = AudioSystem.getClip();
clip.open(audioInputStream);
clip.start();
}
catch(Exception ex)
{
System.out.println("Error with playing sound.");
ex.printStackTrace( );
}
}
public JButtonClick() {
JFrame frame = new JFrame("Button-Click test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.pack();
frame.add(panel);
frame.setSize(800, 600);
frame.setResizable(true);
frame.setVisible(true);
panel.add(test);
test.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
playSound("JButton.wav");
}
});
}
public static void main(String[] args) {
new JButtonClick();
}
}
My .wav file is in the same package as this class. But instead of it playing the sound I want, it just says this:
java.io.FileNotFoundException: C:\Users\diego\workspace\Super Mario Bros 1\JButton.wav (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at com.sun.media.sound.WaveFloatFileReader.getAudioInputStream(Unknown Source)
at javax.sound.sampled.AudioSystem.getAudioInputStream(Unknown Source)
at JButtonClick.playSound(JButtonClick.java:21)
at JButtonClick$1.actionPerformed(JButtonClick.java:49)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
What am I doing wrong?!
Here is the problem due to placement of your .wav file.
As per your question your have placed it in the same package as this class that's why you are getting FileNotFoundException.
Let me explain you how new File(pathname) works:
Javadoc about File says:
A pathname, whether abstract or in string form, may be either absolute or relative. An absolute pathname is complete in that no other information is required in order to locate the file that it denotes. A relative pathname, in contrast, must be interpreted in terms of information taken from some other pathname. By default the classes in the java.io package always resolve relative pathnames against the current user directory.
It you are running this application in eclipse then place .wav file directly in the project (outside src folder) as shown below:
AudioSystem.getAudioInputStream(new File("Jbutton.wav"));
You can try also by placing it in resource folder.
AudioSystem.getAudioInputStream(new File("resources/Jbutton.wav"));
custom sounds play...using NetBeans..
First of all import some package or class name like this
import java.applet.Applet;
import java.applet.AudioClip;
import java.net.URL;
Not working because generate Error on java.lang.NullPointerException
URL url = getClass().getResource("\\dbmsystem\\src\\sound\\Your_sound_name.wav");
URL url = getClass().getResource("G:\\zala\\dbmsystem\\src\\sound\\Your_sound_name.wav");
But Proper Working like this
URL url = getClass().getResource("/sound/Your_sound_name.wav");
AudioClip clip = Applet.newAudioClip(url);
clip.play();