We Keep Coding

Strange behavior of ItemStack

For some obscene reason this works when reward = "DIAMOND" and amount = 10
public ItemStack giveReward() {
return new ItemStack(Material.matchMaterial(reward), amount);
}
p.getInventory().addItem(o.giveReward()); //gives the player 10 DIAMONDS
but when reward = "ACACIA_DOOR" and amount = 1 the same method gives the player NOTHING and no error is thrown. I have no clue why. Also
System.out.println(Material.getMaterial("ACACIA_DOOR"))
prints ACACIA_DOOR so shouldn't my above code work?
here's the rest of the code:
//imports omitted
public class ObjectivesRPG extends JavaPlugin implements Listener {
//TODO
//add view command
//implement rewards and requirements
//test for completeness
//future - allow ops to modify player data
public static void main(String args[]) {
Objective o = new Objective("Spider", 1, 3, "DIAMOND", 1);
Material m = Material.getMaterial("ACACIA_DOOR");
System.out.println(m);
//meta.setDisplayName(ChatColor.GOLD + "Excaliber");
//meta.setLore(Arrays.asList(ChatColor.AQUA + "The legendary sword", ChatColor.GREEN + "Wow"));
//sword.setItemMeta(meta);
//System.out.println(o.getName());
/*
System.out.println(Material.DIAMOND_SWORD);
ItemStack stack = new ItemStack(Material.DIAMOND_SWORD, 1);
ItemMeta meta = stack.getItemMeta();
stack.setItemMeta(meta);*/
}
private ArrayList<Objective> objectives = null;
private HashMap<String, ArrayList<Objective>> loadedPlayerData = null;
#SuppressWarnings("unchecked")
#Override
public void onEnable() {
System.out.println("ObjectivesRPG loaded");
loadedPlayerData = new HashMap<>();
File dir = getDataFolder();
if (!dir.exists()) {
Bukkit.getConsoleSender().sendMessage(ChatColor.YELLOW + "[ObjectivesRPG] Could not find data directory, creating it");
if (!dir.mkdir()) {
System.out.println("Error: Could not create data directory");
}
}
objectives = (ArrayList<Objective>) load(new File(getDataFolder(), "objectives.dat"));
if (objectives == null) {
objectives = new ArrayList<>();
}
getServer().getPluginManager().registerEvents(this, this); // ParamListener,
// ParamPlugin
}
#Override
public boolean onCommand(CommandSender sender, Command cmd, String label, String args[]) {
if (label.equalsIgnoreCase("objectives")) {
if (sender instanceof Player) {
Player p = (Player) sender;
if(args.length == 0) {
for(Objective o: loadedPlayerData.get(p.getName())) {
p.sendMessage(o.getName() + " " + o.getTillComplete() + " ");
}
}
if (args.length > 0) {
if (args[0].equals("create")) {
if (!p.isOp()) {
p.sendMessage(ChatColor.RED + "You must be op to use this command");
} else if (args.length == 6) {
Objective objective = new Objective(args[1] ,Integer.parseInt(args[2]), Integer.parseInt(args[3]), args[4], Integer.parseInt(args[5]));
objectives.add(objective);
save(objectives, new File(getDataFolder(), "objectives.dat"));
} else {
p.sendMessage(ChatColor.RED + "Error: Bad arguments.");
}
}
}
}
}
return true;
}
public void onDisable() {
save(objectives, new File(getDataFolder(), "objectives.dat"));
}
public void save(Object o, File f) {
try {
if (!f.exists()) {
f.createNewFile();
}
ObjectOutputStream os = new ObjectOutputStream(new FileOutputStream(f));
os.writeObject(o);
Bukkit.getConsoleSender().sendMessage("[ObjectivesRPG] Saved objective");
os.flush();
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public Object load(File f) {
try {
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(f));
Object result = ois.readObject();
ois.close();
return result;
} catch (Exception e) {
return null;
}
}
#EventHandler
private void checkKills(EntityDeathEvent e) {
Entity killed = e.getEntity();
Entity killer = e.getEntity().getKiller();
if(killer instanceof Player) {
Player p = (Player) killer;
for(Objective o: loadedPlayerData.get(p.getName())) {
if(o.isComplete()) {
continue;
}
if(!o.isComplete() && (o.getRequirement() == Requirement.kill_Spiders && killed instanceof Spider ||
o.getRequirement() == Requirement.kill_Zombies && killed instanceof Zombie) ||
o.getRequirement() == Requirement.kill_Skeletons && killed instanceof Skeleton
) {
o.setTillComplete(o.getTillComplete() - 1);
if(o.getTillComplete() == 0) {
p.sendMessage(ChatColor.GREEN + "Congragulations! You completed objective " + o.getName() + "! Here is your reward!");
p.getInventory().addItem(o.giveReward());
o.setComplete(true);
}
}
}
}
}
#EventHandler
private void onQuit(PlayerQuitEvent event) {
Player player = event.getPlayer();
File f = new File(getDataFolder(), player.getName());
save(loadedPlayerData.get(player.getName()), f);
loadedPlayerData.remove(player.getName());
}
#EventHandler
private void onJoin(PlayerJoinEvent event) {
Player player = event.getPlayer();
File f = new File(getDataFolder(), player.getName());
ArrayList<Objective> playerObjectives = null;
try {
if(!f.exists()) {
f.createNewFile();
Bukkit.getConsoleSender().sendMessage("[ObjectivesRPG] Could not find " + player.getName() + "'s objective data, creating it");
playerObjectives = new ArrayList<>();
for(Objective objective: objectives) {
playerObjectives.add(objective);
}
player.sendMessage(ChatColor.GREEN + "You have new objective(s) to complete! Type /objectives to view them.");
save(playerObjectives, f);
} else {
playerObjectives = (ArrayList<Objective>) load(f);
System.out.println(objectives.size() + " " + playerObjectives.size());
//If server objective list is larger than playerObjectives new objectives must be added to player list
if(objectives.size() > playerObjectives.size()) {
player.sendMessage(ChatColor.GREEN + "You have new objective(s) to complete! Type /objectives to view them.");
for(int i = 0; i < objectives.size(); i++) {
boolean objectiveAdded = false;
for(int j = 0; j < playerObjectives.size(); j++) {
if(objectives.get(i).getName().equals(playerObjectives.get(j).getName())) {
objectiveAdded = true;
//break;
}
}
if(!objectiveAdded) {
playerObjectives.add(objectives.get(i));
}
}
save(playerObjectives, f);
}
}
loadedPlayerData.put(player.getName(), playerObjectives);
} catch(Exception e) {
e.printStackTrace();
}
}
}
public class Objective implements Serializable {
private static final long serialVersionUID = -2018456670240873538L;
private static ArrayList<Requirement> requirements = new ArrayList<>();
private String name;
private Requirement requirement;
private String reward;
private int amount;
private int tillComplete;
private boolean complete;
public Objective(String name, int requirementIndex, int tillComplete, String reward, int amount) {
if(requirements.isEmpty()) {
requirements.add(Requirement.kill_Skeletons);
requirements.add(Requirement.kill_Spiders);
requirements.add(Requirement.kill_Zombies);
}
this.name = name;
this.requirement = requirements.get(requirementIndex);
this.tillComplete = tillComplete;
this.reward = reward;
this.amount = amount;
complete = false;
}
public ItemStack giveReward() {
return new ItemStack(Material.matchMaterial(reward), amount);
}
public String getName() {
return name;
}
public Object getRequirement() {
return requirement;
}
public static ArrayList<Requirement> getRequirements() {
return requirements;
}
public static void setRequirements(ArrayList<Requirement> requirements) {
Objective.requirements = requirements;
}
public int getTillComplete() {
return tillComplete;
}
public void setTillComplete(int tillComplete) {
this.tillComplete = tillComplete;
}
public void setName(String name) {
this.name = name;
}
public void setRequirement(Requirement requirement) {
this.requirement = requirement;
}
public void setReward(String reward) {
this.reward = reward;
}
public void setComplete(boolean complete) {
this.complete = complete;
}
public String getReward() {
return reward;
}
public boolean isComplete() {
return complete;
}
}

This has tripped people up more than once. Doors are two-component items. ACACIA_DOOR represents the top-part of the door, while ACACIA_DOOR_ITEM represents the bottom-part and also the item id. Use ACACIA_DOOR_ITEM when creating an ItemStack.
Tip: If you are unsure about an item id, launch Minecraft in creative mode and enable Advanced Tooltips by pressing F3+H. The real item id will be displayed in the tool tip as you hover over items in the creative inventory. For example, hovering over an Acacia Door would display
Acacia Door (#0430)
Use this information to lookup the appropriate Material enum in org.bukkit.Material, which in this case would be ACACIA_DOOR_ITEM.

Codename one GPS tracker

I want to track the device with GPS signal. At the same time show latitude, longitude, altitude and speed.
I use this code and there is no result on the screen:
#Override
protected void onGpsTracker_ButtonAction(Component c, ActionEvent event) {
try {
int i = 0;
Location loc = mylocLocationManager.getCurrentLocation();
if(loc.getStatus()==LocationManager.AVAILABLE) {
} else {
Dialog.show("Error!", "Falla de señal", "OK", null);
}
mylocLocationManager.setLocationListener(new LocationListener() {
public void locationUpdated(Location location) {
gpsLocation= location;
Component c = null;
Label labelalt = (Label)findByName("altitudT", c);
Label labellat = (Label)findByName("latitudT", c);
Label labellng = (Label)findByName("longitudT", c);
Label labeldist = (Label)findByName("distanciaT", c);
Label labelspeed = (Label)findByName("speedT", c);
altmax= location.getAltitude();
double lat = location.getLatitude();
double lng = location.getLongitude();
float speed = location.getVelocity();
double alt = location.getAltitude();
velprompos = velprompos + 1;
totspeed = (int) (totspeed + speed);
velopro = totspeed / velprompos;
totalt = altmax - alt;
velmax=speed;
Coord lastLocation = new Coord(lat, lng);
mapComponent.zoomTo(lastLocation, 15);
prevdistance = totdistance;
prevLon = currentLon;
prevLat = currentLat;
String Salt = String.valueOf(alt);
labelalt.setText(Salt);
String Slat = String.valueOf(lat);
labellat.setText(Slat);
String Slng = String.valueOf(lng);
labellng.setText(Slng);
String Sspeed = String.valueOf(speed);
labelspeed.setText(Sspeed);
//aca hay q pner dibujo lineas
}
public void providerStateChanged(int newState) {
//positionMethod();
}
});
} catch (Exception ex) {
ex.printStackTrace();
gpsLocation = null;
}
}
The idea is to get the location when the device is moving, and show this results on some labels. Any help?

You are implementing couple of things wrongly.
Add #override to overriden methods like locationUpdated and providerStateChanged .
Don't re-declare Component c as and set it to null
Get your labels by calling them directly with find method and pass c as a parameter
revalidate or repaint your form after each update.
As a general advice, keep your variable declaration consistence, declare Number of Mangoes as numOfMangoes and not numberofmangoes nor numofmangoes nor Numberofmangoes.
#Override
protected void onGpsTracker_ButtonAction(Component c, ActionEvent event) {
try {
int i = 0;
Location loc = mylocLocationManager.getCurrentLocation();
if (loc.getStatus() == LocationManager.AVAILABLE) {
System.out.println("Location available");
} else {
Dialog.show("Error!", "Falla de señal", "OK", null);
}
final LocationManager mylocLocationManager = LocationManager.getLocationManager();
mylocLocationManager.setLocationListener(new LocationListener() {
#Override
public void locationUpdated(Location location) {
gpsLocation = location;
Label labelspeed = ;
altmax = location.getAltitude();
double lat = location.getLatitude();
double lng = location.getLongitude();
float speed = location.getVelocity();
double alt = location.getAltitude();
velprompos = velprompos + 1;
totspeed = (int) (totspeed + speed);
velopro = totspeed / velprompos;
totalt = altmax - alt;
velmax = speed;
Coord lastLocation = new Coord(lat, lng);
mapComponent.zoomTo(lastLocation, 15);
prevdistance = totdistance;
prevLon = currentLon;
prevLat = currentLat;
String Salt = String.valueOf(alt);
findAltitudT(c).setText(Salt);
String Slat = String.valueOf(lat);
findLatitudT(c).setText(Slat);
String Slng = String.valueOf(lng);
findLongitudT(c).setText(Slng);
String Sspeed = String.valueOf(speed);
findSpeedT(c).setText(Sspeed);
c.getComponentForm().revalidate();
//aca hay q pner dibujo lineas
}
#Override
public void providerStateChanged(int newState) {
//positionMethod();
}
});
} catch (Exception ex) {
ex.printStackTrace();
gpsLocation = null;
}
}

Unable to invoke checkPointInCircle method in this test program I did

I'm writing a test program currently to check for points within a circle. But the method to check if the point is in the circle isn't invoked. Did I do something? Can someone kindly advise on how to solve this issue?
btSearch.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
rad = spRadius.getSelectedItem().toString();
if (rad.equals("1km")) {
circle.setRadius(500);
processJSON();
} else if (rad.equals("100m")) {
circle.setRadius(50);
processJSON();
} else if (rad.equals("500m")) {
circle.setRadius(250);
processJSON();
}
}
private void processJSON() {
try {
if (mJSONObject != null) {
Iterator<String> keys = mJSONObject.keys();
while (keys.hasNext()) {
String key = keys.next();
JSONObject jsonObj = mJSONObject.getJSONObject(key);
String point = jsonObj.getString("coords");
String[] latlong = point.split(",");
latpoint = Double.parseDouble(latlong[0]);
lngpoint = Double.parseDouble(latlong[1]);
Toast.makeText(this,latpoint+"+"+lngpoint,Toast.LENGTH_SHORT).show();
if (checkPointInCircle(latcenter, lngcenter, latpoint, lngpoint)) {
mMap.addMarker(new MarkerOptions().
position(new LatLng(latpoint, lngpoint)).title("busstop"));
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public boolean checkPointInCircle(double latcenter, double lngcenter, double latpoint, double lngpoint) {
Double radi = Double.parseDouble(rad);
double latdiff = (latpoint - latcenter);
latdiff = Math.pow(latdiff, 2);
double longdiff = (lngpoint - lngcenter);
longdiff = Math.pow(longdiff, 2);
radi = Math.pow(radi, 2);
if (latdiff + longdiff < radi) {
return true;
}
return false;
}

Frame only appears some of the time java

For some reason (seemingly completely independent of code) the frame of my program will only appear some (maybe 20%) of the time. If I just continuously hit run I evently get the frame to show successfully, but it is never repeatable. has this ever happened to anyone else? I highly doubt this has to do with code but just in case
public class Trader{
public static Trader INSTANCE = new Trader();
JTextArea msgBox;
ApiController m_controller;
Connection connect;
Quotes quotes;
ArrayList<String> m_acctList = new ArrayList();
public static void main(String[] args) {
INSTANCE.run();
}
public void run(){
connect = new Connection();
}
public ArrayList<String> accountList() { return m_acctList; }
public ApiController controller() { return m_controller; }
public JFrame frame() { return connect.frame; }
}
next class
public class Connection implements IConnectionHandler{
static int port = 4001;
Quotes quotes;
JFrame frame;
CPanel panel;
boolean connected = false;
JTextArea logIn = new JTextArea();
JTextArea logOut = new JTextArea();
JTextArea msgBox = new JTextArea();
Logger loggerIn = new Logger(logIn);
Logger loggerOut = new Logger(logOut);
ApiController m_controller = new ApiController(this, loggerIn, loggerOut);
final ArrayList<String> m_acctList = new ArrayList<String>();
Connection(){
frame = new JFrame("Trader");
panel = new CPanel();
frame.add(panel);
frame.setSize(800,400);
frame.setResizable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
class CPanel extends JComponent{
Point frameLoc = frame.getLocation();
Dimension frameSize = frame.getSize();
JLabel text = new JLabel("Messages");
JScrollPane messages = new JScrollPane(msgBox);
CPanel(){
setLayout(null);
add(text);
text.setBounds(frameLoc.x+5, frameLoc.y+5,
text.getPreferredSize().width, text.getPreferredSize().height);
add(messages);
msgBox.setEditable(false);
msgBox.setLineWrap(true);
messages.setBounds(text.getLocation().x, text.getLocation().y+text.getSize().height+10,
720, 300);
m_controller.connect(null, port, 0);
}
}
#Override public void connected() {
show( "connected");
m_controller.reqCurrentTime( new ApiController.ITimeHandler() {
#Override public void currentTime(long time) {
show( "Server date/time is " + Formats.fmtDate(time * 1000) );
}
});
m_controller.reqBulletins( true, new ApiController.IBulletinHandler() {
#Override public void bulletin(int msgId, Types.NewsType newsType, String message, String exchange) {
String str = String.format( "Received bulletin: type=%s exchange=%s", newsType, exchange);
show( str);
show( message);
}
});
// Quotes quotes = new Quotes();
}
#Override public void disconnected() {
show( "disconnected");
}
#Override public void accountList(ArrayList<String> list) {
show( "Received account list");
m_acctList.clear();
m_acctList.addAll( list);
}
#Override public void error(Exception e) {
show( e.toString() );
}
#Override public void message(int id, int errorCode, String errorMsg) {
show( id + " " + errorCode + " " + errorMsg);
}
#Override public void show( final String str) {
SwingUtilities.invokeLater( new Runnable() {
#Override public void run() {
msgBox.append(str);
msgBox.append( "\n\n");
Dimension d = msgBox.getSize();
msgBox.scrollRectToVisible( new Rectangle( 0, d.height, 1, 1) );
}
});
}
private static class Logger implements ILogger{
final private JTextArea msgBox;
Logger(JTextArea area){
msgBox = area;
}
#Override public void log(final String str) {
SwingUtilities.invokeLater( new Runnable() {
#Override public void run() {
// m_area.append(str);
//
// Dimension d = m_area.getSize();
// m_area.scrollRectToVisible( new Rectangle( 0, d.height, 1, 1) );
}
});
}
}
}
and lastly
public class Quotes {
int numberOfStocks = 0;
JTextArea msgBox = Trader.INSTANCE.connect.msgBox;
String symbol;
File file = new File("/Users/spencerclayman/Desktop/IB_API/API_Data/stockList.txt");
ArrayList<quote> stockList = new ArrayList();
Quotes(){
msgBox.append("Getting stock quotes");
try(Scanner input = new Scanner(file);){
while(input.hasNextLine()){
symbol = input.nextLine();
newStock(newContract(symbol));
}
}
catch(Exception ex){msgBox.append("Error getting quotes");}
try{wait(10000);}catch(Exception ex){msgBox.append("error waiting - quote");}
for(int i = 0; i < numberOfStocks() -1 ; i++){
msgBox.append(stockList.get(i).m_description
+ " - " + stockList.get(i).m_last +"\n");
}
}
void newStock( NewContract contract) {
quote stock = new quote(contract.description());
stockList.add(stock);
Trader.INSTANCE.controller().reqTopMktData(contract, "", false, stock);
}
void newStock( quote stock) {
stockList.add(stock);
}
public void desubscribe() {
for (quote stock : stockList) {
Trader.INSTANCE.controller().cancelTopMktData(stock);
}
}
public int numberOfStocks(){
try(Scanner input = new Scanner(file);){
while(input.hasNextLine()){
numberOfStocks++;
input.nextLine();
}
}
catch(Exception ex){msgBox.append("Error getting symbols");}
return numberOfStocks;
}
static class quote extends TopMktDataAdapter{
String m_description;
double m_bid;
double m_ask;
double m_last;
long m_lastTime;
int m_bidSize;
int m_askSize;
double m_close;
int m_volume;
boolean m_frozen;
quote(String description){
m_description = description;
}
public String change() {
return m_close == 0 ? null : fmtPct( (m_last - m_close) / m_close);
}
#Override public void tickPrice( NewTickType tickType, double price, int canAutoExecute) {
switch( tickType) {
case BID:
m_bid = price;
break;
case ASK:
m_ask = price;
break;
case LAST:
m_last = price;
break;
case CLOSE:
m_close = price;
break;
}
}
#Override public void tickSize( NewTickType tickType, int size) {
switch( tickType) {
case BID_SIZE:
m_bidSize = size;
break;
case ASK_SIZE:
m_askSize = size;
break;
case VOLUME:
m_volume = size;
break;
}
}
#Override public void tickString(NewTickType tickType, String value) {
switch( tickType) {
case LAST_TIMESTAMP:
m_lastTime = Long.parseLong( value) * 1000;
break;
}
}
#Override public void marketDataType(Types.MktDataType marketDataType) {
m_frozen = marketDataType == Types.MktDataType.Frozen;
}
}
public NewContract newContract(String symbol){
NewContract c = new NewContract();
c.symbol(symbol);
c.secType(Types.SecType.STK);
c.exchange("SMART");
c.currency("USD");
return c;
}
}
again i am highly doubtful that code has anything to do with it. Im assumign its a problem with the IDE.

RMS stored values are not permanently available in J2ME emulator

I have code to stored the value using RMS in J2ME. It's working fine on emulator. So, my first problem is
When i restart the emulator all the stored values are deleted.
Stored values are showing in the emulator, but not in the Mobile, in which i am testing my application.
I am using NetBeans for developing my J2ME application.
===UPDATED===
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.rms.*;
public class TryNew extends MIDlet implements CommandListener, ItemCommandListener {
private RecordStore record;
private StringItem registered;
static final String REC_STORE = "SORT";
//Button existUser;
Display display = null;
private Ticker ticker;
Form form = null;
Form form1 = null;
TextField tb, tb1, tb2, tb3;
ChoiceGroup operator = null;
String str = null;
Command backCommand = new Command("Back", Command.BACK, 0);
Command loginCommand = new Command("Login", Command.OK, 2);
Command saveCommand = new Command("Save New", Command.OK, 1);
Command sendCommand = new Command("Send", Command.OK, 2);
Command selectCommand = new Command("Select", Command.OK, 0);
Command exitCommand = new Command("Exit", Command.STOP, 3);
private ValidateLogin ValidateLogin;
public TryNew() {
}
public void startApp() throws MIDletStateChangeException {
display = Display.getDisplay(this);
form = new Form("Login");
registered = new StringItem("", "Registered ?", StringItem.BUTTON);
form1 = new Form("Home");
tb = new TextField("Login Id: ", "", 10, TextField.PHONENUMBER);//TextField.PHONENUMBER
tb1 = new TextField("Password: ", "", 30, TextField.PASSWORD);
operator = new ChoiceGroup("Select Website", Choice.POPUP, new String[]{"Game", "Joke", "SMS"}, null);
form.append(tb);
form.append(tb1);
form.append(operator);
form.append(registered);
registered.setDefaultCommand(selectCommand);
registered.setItemCommandListener(this);
form.addCommand(saveCommand);
ticker = new Ticker("Welcome Screen");
form.addCommand(loginCommand);
form.addCommand(selectCommand);
form.addCommand(exitCommand);
// existUser = new StringItem(null, "Registered ?");
// form.append(existUser);
form.setCommandListener(this);
form1.addCommand(exitCommand);
form1.addCommand(sendCommand);
form1.setCommandListener(this);
form.setTicker(ticker);
display.setCurrent(form);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
}
void showMessage(String message, Displayable displayable) {
Alert alert = new Alert("");
alert.setTitle("Error");
alert.setString(message);
alert.setType(AlertType.ERROR);
alert.setTimeout(5000);
display.setCurrent(alert, displayable);
}
public void commandAction(Command c, Displayable d) {
if (c == exitCommand) {
destroyApp(true);
notifyDestroyed();
} else if (c == backCommand) {
display.setCurrent(form);
} else if (c == loginCommand) {
ValidateLogin = new ValidateLogin(this);
ValidateLogin.start();
ValidateLogin.validateLogin(tb.getString(), tb1.getString(), operator.getString(operator.getSelectedIndex()));
} else if (c == saveCommand) {
openRecord();
writeRecord(tb.getString(), tb1.getString(), operator.getString(operator.getSelectedIndex()));
closeRecord();
showAlert("Login Credential Saved Successfully !!");
}
}
////==============================================================================/////
/// Record Management
public void openRecord() {
try {
record = RecordStore.openRecordStore(REC_STORE, true);
} catch (Exception e) {
db(e.toString());
}
}
public void closeRecord() {
try {
record.closeRecordStore();
} catch (Exception e) {
db(e.toString());
}
}
public void deleteRecord() {
if (RecordStore.listRecordStores() != null) {
try {
RecordStore.deleteRecordStore(REC_STORE);
} catch (Exception e) {
db(e.toString());
}
}
}
public void writeRecord(String login_id, String pwd, String operator_name) {
String credential = login_id + "," + pwd + "," + operator_name;
byte[] rec = credential.getBytes();
try {
if (login_id.length() > 10 || login_id.length() < 10) {
showAlert("Please Enter valid Login Id");
} else if (pwd.length() < 1) {
showAlert("Please Password !!");
} else {
record.addRecord(rec, 0, rec.length);
}
} catch (Exception e) {
db(e.toString());
}
}
private void showAlert(String err) {
Alert a = new Alert("");
a.setString(err);
a.setTimeout(Alert.FOREVER);
display.setCurrent(a);
}
public void readRecord() {
try {
if (record.getNumRecords() > 0) {
Comparator comp = new Comparator();
RecordEnumeration re = record.enumerateRecords(null, comp, false);
while (re.hasNextElement()) {
String str = new String(re.nextRecord());
showAlert(str);
}
}
} catch (Exception e) {
db(e.toString());
}
}
private void db(String error) {
System.err.println("Exception: " + error);
}
public void commandAction(Command c, Item item) {
if (c == selectCommand && item == registered) {
openRecord();
readRecord();
closeRecord();
}
}
class Comparator implements RecordComparator {
public int compare(byte[] rec1, byte[] rec2) {
String str1 = new String(rec1);
String str2 = new String(rec2);
int result = str1.compareTo(str2);
if (result == 0) {
return RecordComparator.EQUIVALENT;
} else if (result < 0) {
return RecordComparator.PRECEDES;
} else {
return RecordComparator.FOLLOWS;
}
}
}
class ValidateLogin implements Runnable {
TryNew midlet;
private Display display;
String login_id;
String pwd;
String operator_name;
public ValidateLogin(TryNew midlet) {
this.midlet = midlet;
display = Display.getDisplay(midlet);
}
public void start() {
Thread t = new Thread(this);
t.start();
}
public void run() {
if (login_id.length() > 10 || login_id.length() < 10) {
showAlert("Please Enter valid Login Id");
} else if (pwd.length() < 1) {
showAlert("Please Password !!");
} else {
showHome();
}
}
/* This method takes input from user like text and pass
to servlet */
public void validateLogin(String login_id, String pwd, String operator_name) {
this.login_id = login_id;
this.pwd = pwd;
this.operator_name = operator_name;
}
/* Display Error On screen*/
private void showAlert(String err) {
Alert a = new Alert("");
a.setString(err);
a.setTimeout(Alert.FOREVER);
display.setCurrent(a);
}
private void showHome() {
tb2 = new TextField("To: ", "", 30, TextField.PHONENUMBER);
tb3 = new TextField("Message: ", "", 300, TextField.ANY);
form1.append(tb2);
form1.append(tb3);
form1.addCommand(loginCommand);
//display.setCurrent(tb3);
display.setCurrent(form1);
}
};
}
This is what i got, when i click the Manage Emulator

You need to fix the storage_root of your app in WTK,
Whenever you start your enulator it would refer to same storage_root, by default it creates different data files for each session