:P NullPointerException madness..

[Kyle Berry]

err i get a kinda big NullPointerException when i run this and i can't fix this! any ideas? (code for the program is below)

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.util.*;
import chn.util.*;
import java.math.*;
import java.util.Random.*;
import java.net.*;
 
/* The Main Class File */
public class RPG implements Runnable
{
public void run()
{
}
public static void main(String[] args)
{
UIStuff ui = new UIStuff();
ui.createMainMenu();
}
}
/* End Of Main Class File */
 
/* Login Class */
class login
{
public login()
{

}
public boolean loginToGame()
{
String accountName = null;
String password = null;
 
UIStuff ui = new UIStuff();
ui.createAccountForm();
while(accountName == null)
{
accountName = ui.grabAccountName();
}
 
File accountFile = new File(accountName + "_main.rpg");
if(accountFile.exists() == false)
{
return false;
}
FileInput inFile = new FileInput(accountName + "_main.rpg");
ui.createPasswordForm();
while(password == null)
{
password = ui.grabPassword();
}
String passwordInFile = inFile.readLine();
if(!passwordInFile.equals(password))
{
return false;
}
return true;
}
}
/* End Of Login Class */
 
/* accountCreate Class */
class CreateAccount
{
public CreateAccount()
{

}
public void startCreate()
{
}
}
/* End Of accountCreate Class */
 
/*Start of Creature Class*/
class Creatures
{
int Hp;
int lvl;
int xsize; // pixils in width for the pic
int ysize; // pixils in highth for the pic
String mobname;
public void rabbit()
{
mobname = "Rabbit";
Hp = 5;
lvl = 1;
xsize = 200;
ysize = 200;

}
public void squirrel()
{
mobname = "Squirrel";
Hp = 5;
lvl = 1;
xsize = 130;
ysize = 130;
}
public void bigRabbit()
{
mobname = "Super giant ugly bunny";
Hp = 5897284;
lvl = 400;
xsize = 500;
ysize = 500;
}
public void CharredBeast()
{
mobname = "CharredBeast";

//lvl = Math.next(5) + 5;
Hp = lvl * 3;
xsize = 250;
ysize = 250;
}
public void GhostlumpHangman()
{
mobname = "GhostlumpHangman";
//lvl = Math.next(5) + 5;
Hp = lvl *3;
xsize = 300;
ysize = 200;

}
public void GlassmuckDisenchanter()
{
mobname = "Glass muck Disenchanter";
//lvl = Math.next(10) + 10;
Hp = lvl * 3;
xsize = 300;
ysize = 150;
}
public void Golemspore()
{

}
public void HauntedArmor()
{

}
public void HuntplatinumPosessor()
{

}
public void LordPuddingBlasphemer()
{

}
}
 
/* Start Of battleStuff Class */
class battleStuff
{
public battleStuff()
{

}
public void attack()
{

}
public void defend()
{

}
public void fireBall()
{

}
public void frostBolt()
{

}
public void arcaneBlast()
{

}
}
/* End Of battleStuff Class */
 
/*Start of the XpStuff Class */
class XpStuff 
{
double totalxp;
double xpremaining;
double xpgained;
int pl;
public double xp()
{
//login playl = new login();
//pl = playl.exportplayerleveltoOtherClass();
//int x = pl;
//totalxp = Math.pow(1.2 * x * 1.3, (x - (x / (5/4))) * (3/2));
//return totalxp;
return 0.0;
}
}
 
/* Start Of UIStuff Class */
class UIStuff
{
int min = 0;
int max = 1000;
JProgressBar xpBar;
JFrame attackFrame;
JFrame spellList;
JRootPane attackFrameRoot;
Container attackContent;
JPanel attackPanel;
JButton attackButton;
JButton fleeButton;
JButton SpellButton;
JPanel spellPanel;
JButton FireballButton;
JButton bringerOfDoomButton;
JButton FrostBoltButton;
JButton arcaneBlastButton;
JPanel xpPanel;
JLabel msg;
JFrame xpFrame;
JRootPane xpFrameRoot;
JLabel xpAmount;
Container xpContent;
Container spellContent;
JFrame spellFrame;
JLabel spellLabel;
JRootPane spellRootPane;
char[] accountName;
JPasswordField accountField;
JPanel accountPanel;
JLabel accountMsg;
JFrame accountFrame;
JRootPane accountRootPane;
Container accountContent;
char[] password;
JPasswordField passwordField;
JPanel paswordPanel;
JLabel passwordMsg;
JFrame passwordFrame;
Container passwordContent;
JPanel menuPanel;
JFrame menuFrame;
JLabel menuMsg;
JRootPane menuFrameRoot;
Container menuContent;

public String grabAccountName()
{
String fullName = "";
int aLoop = 0;
if(accountName != null)
{
while(aLoop <= accountName.length)
{
fullName = fullName + accountName[aLoop];
}
return fullName;
}
else return null;
}
public String grabPassword()
{
String fullPassword = "";
int bLoop = 0;
if(password != null)
{
while(bLoop <= password.length)
{
fullPassword = fullPassword + password[bLoop];
}
return fullPassword;
}
else return null;
}
public void createXPBar(int charXp)
{
xpPanel = new JPanel();
xpAmount = new JLabel(charXp + " / 1000", JLabel.CENTER);
xpFrame = new JFrame();
xpFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
xpFrameRoot = xpFrame.getRootPane();
xpContent = xpFrame.getContentPane();
xpContent.setLayout(new BorderLayout());
xpContent.add(xpAmount, BorderLayout.CENTER);
xpContent.add(xpPanel, BorderLayout.SOUTH);
xpContent.setSize(100,100);
xpContent.setVisible(true);
}
public void createHPBar(int charHPAmount)
{

}
public void setHPBar(int hp)
{

}
public void startOutputConsole()
{
try
{
    new Console();
    }
    catch(IOException e)
    {
    }
}
public void createAccountForm()
{
accountField = new JPasswordField("Account:");
    accountField.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
accountName = accountField.getPassword();
}
});
accountPanel = new JPanel();
accountPanel.add(accountField);
accountMsg = new JLabel("", JLabel.CENTER);
accountFrame = new JFrame();
accountFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
accountRootPane = accountFrame.getRootPane();
accountContent = accountFrame.getContentPane();
    accountContent.setLayout(new BorderLayout());
    accountContent.add(msg, BorderLayout.CENTER);
    accountContent.add(accountPanel, BorderLayout.SOUTH);
    accountFrame.setSize(400,100);
    accountFrame.setVisible(true);
}
public void createPasswordForm()
{
passwordField = new JPasswordField("Password: ");
//passwordField.setEchoChar('*');
passwordField.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
password = passwordField.getPassword();
}
});
}
public void createAttackButton()
{
attackButton = new JButton("Attack!");

 attackButton.addActionListener(new ActionListener()
 {
   public void actionPerformed(ActionEvent e)
   {
   battleStuff bs = new battleStuff();
   bs.attack();
   }
 }); 
}
public void createFleeButton()
{
fleeButton = new JButton("flee");
 
fleeButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
battleStuff bs = new battleStuff();
//bs.flee();
}
});
}
public void createSpellButtton()
{
SpellButton = new JButton("Spell");

SpellButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
battleStuff bs = new battleStuff();
//bs.Spell();
}
});
}
public void createFireballButton()
{
FireballButton = new JButton("FireBall");
 
FireballButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
battleStuff bs = new battleStuff();
//bs.Fireball();
}
});
}
public void createFrostBoltButton()
{
FrostBoltButton = new JButton("FrostBolt");
 
FrostBoltButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
battleStuff bs = new battleStuff();
//bs.FrostBolt();
}
});
}
public void createarcaneBlastButton()
{
arcaneBlastButton = new JButton("arcaneBlast");
 
arcaneBlastButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
battleStuff bs = new battleStuff();
//bs.arcaneBlast();
}
});
}
public void createbringerofDoomButton()
{
bringerOfDoomButton = new JButton("Bringer of Doom");

bringerOfDoomButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
battleStuff bs = new battleStuff();
//bs.bringerofdoom();
}
});
}
public void createBattlePanel()
{
attackPanel = new JPanel();

 
attackPanel.add(attackButton);
attackPanel.add(fleeButton);
attackPanel.add(SpellButton);


 
msg = new JLabel("Battle Panel", JLabel.CENTER);

attackFrame = new JFrame();
attackFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
attackFrameRoot = attackFrame.getRootPane();
attackFrameRoot.setDefaultButton(attackButton);

attackContent = attackFrame.getContentPane();
    attackContent.setLayout(new BorderLayout());
    attackContent.add(msg, BorderLayout.CENTER);
    attackContent.add(attackPanel, BorderLayout.SOUTH);
    attackFrame.setSize(400,100);
    attackFrame.setVisible(true);
 

}
public void createSpellPanel()
{
spellPanel = new JPanel();
 
login playl = new login();
//int pl = playl.exportplayerleveltoOtherClass();
 
//if(pl >= 2)
//{
spellPanel.add(FireballButton);
//}
//if(pl >= 7)
//{
spellPanel.add(FrostBoltButton);
//}
//if(pl >= 12)
//{
spellPanel.add(arcaneBlastButton);
//}
//if(pl >= 40)
//{
spellPanel.add(bringerOfDoomButton);
//}
 
spellLabel = new JLabel("Spell Panel", JLabel.CENTER);
spellFrame = new JFrame();
spellFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
spellRootPane = spellFrame.getRootPane();
spellRootPane.setDefaultButton(FireballButton);
 
spellContent = spellFrame.getContentPane();
spellContent.setLayout(new BorderLayout());
spellContent.add(spellLabel, BorderLayout.CENTER);
spellContent.add(attackPanel, BorderLayout.SOUTH);
spellFrame.setSize(400,100);
spellFrame.setVisible(false);
}
public void createMainMenu()
{
menuPanel = new JPanel();
JButton loginButton = new JButton("Login");
loginButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
login l = new login();
l.loginToGame();
}
});
JButton createAccountButton = new JButton("Create Account");
createAccountButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
}
});
JButton quitButton = new JButton("Quit");
quitButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
});
 
menuPanel.add(loginButton);
menuPanel.add(createAccountButton);
menuPanel.add(quitButton);


 
menuMsg = new JLabel("Main Menu", JLabel.CENTER);

menuFrame = new JFrame();
menuFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
menuFrameRoot = menuFrame.getRootPane();
menuFrameRoot.setDefaultButton(loginButton);

menuContent = menuFrame.getContentPane();
    menuContent.setLayout(new BorderLayout());
    menuContent.add(menuMsg, BorderLayout.CENTER);
    menuContent.add(menuPanel, BorderLayout.SOUTH);
    menuFrame.setSize(400,100);
    menuFrame.setVisible(true);
}
public void showBattlePanel(boolean bp)
{
attackFrame.setVisible(bp);
}
public void showSpellPanel(boolean sp)
{
spellFrame.setVisible(sp);
}
}
/* End Of UIStuff Class */
 
/* Start Of Online Class */
class Online
{
ServerSocket serverSocket;
Socket clientSocket;
public void createServerSocket()
{
Online o = new Online();
try
{
serverSocket = new ServerSocket(o.getPort());
}
catch(IOException e)
{
}
}
public void createClientSocket()
{
try
{
InetAddress addr = InetAddress.getByName("shadowwhispers.servegame.com");
Online o = new Online();
clientSocket = new Socket(addr , o.getPort());
}
catch(UnknownHostException e)
{
}
catch(IOException e)
{
}
}
public int getPort()
{
return 4001;
}
public byte[] getIPAddr() throws IOException
{
byte[] ipAddr;
InetAddress addr = InetAddress.getLocalHost();
ipAddr = addr.getAddress();
return ipAddr;
}
public String getHostName() throws UnknownHostException
{
InetAddress hName = InetAddress.getLocalHost();
String hostname = hName.getHostName();
return hostname;
}
public void clientWriteToSocket()
{
ConsoleIO console = new ConsoleIO();
try
{
BufferedWriter write = new BufferedWriter(new OutputStreamWriter(clientSocket.getOutputStream()));
write.write("");
write.flush();
}
catch(IOException e)
{
}
}
public void clientReadSocket()
{
try
{
BufferedReader read = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String line;
while((line = read.readLine()) != null)
{

}
read.close();
}
catch(IOException e)
{
}
}
}
/* End Of Online Class */
    

[marc weber]

Well, the code doesn't help much, because it won't compile as is -- probably because I don't have the chn.util package.

When you get the exception, it should tell you the line number that caused the problem. Please tell us where the problem is, and we can probably help you.

[Kyle Berry]

well... heres a pic with all the errors in it with the lines...

http://img54.imageshack.us/img54/9128/runescape00007xf.jpg

[Michael Dunn]

in createAccountForm
accountContent.add(msg, BorderLayout.CENTER);
msg could be null

msg is created in createBattlePanel(), but I don't know
which method is called first

[Kyle Berry]

Originally posted by Michael Dunn:
in createAccountForm
accountContent.add(msg, BorderLayout.CENTER);
msg could be null

msg is created in createBattlePanel(), but I don't know
which method is called first

oh two msgs... whoops lol x_X'' smart of me... and createBattlePanel() isn't called yet...

[Kyle Berry]

great now my program lags my comp like crazy for some reason when it tries to load my loginToGame method..

[Michael Dunn]

from loginToGame()
while(accountName == null)
{
accountName = ui.grabAccountName();
}

then from grabAccountName()
if(accountName != null) //<---check value of accountName
...
else return null;

could be that grabAccountName is returning null, causing infinite loop
in the while() of loginToGame

[Kyle Berry]

Originally posted by Michael Dunn:
from loginToGame()
while(accountName == null)
{
accountName = ui.grabAccountName();
}

then from grabAccountName()
if(accountName != null) //<---check value of accountName
...
else return null;

could be that grabAccountName is returning null, causing infinite loop
in the while() of loginToGame

thanks... ill try a different way of doing this later...