Hey, I'm setting my button array to a string value and using a for loop to add then to panel as well as do various other things! My problem is when i answer yes then click the lets play button it gives me all these errors:
CODE
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at TicTacToe.Top(TicTacToe.java:52)
at TicTacToe.actionPerformed(TicTacToe.java:94)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
I'm not sure why its doing this. Thanks in advance!
Here's my code:
CODE
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class TicTacToe extends JFrame implements ActionListener, ItemListener
{
private JFrame Intro = new JFrame(), Stats = new JFrame(), Top = new JFrame(), Mid = new JFrame(), Bot = new JFrame();
private JButton start, btns[];
private JPanel pane, panel, panel1;
public TicTacToe()
{
int x = JOptionPane.showConfirmDialog(null, "Would you like to play Tic-Tac-Toe?");
if(x == JOptionPane.YES_OPTION)
{
Intro();
}
else
{
System.exit(0);
}
}
public JFrame Intro()
{
Intro.setTitle("IT'S TIC-TAC-TOE!");
Intro.setBounds(475, 425, 250, 143);
Intro.setResizable(false);
Intro.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pane = new JPanel();
Container con = Intro.getContentPane();
JLabel pic = new JLabel(new ImageIcon("funny.gif"));
start = new JButton("LET'S PLAY!");
start.addActionListener(this);
pane.add(pic);
pane.add(start);
con.add(pane);
Intro.setVisible(true);
return Intro;
}
public JFrame Stats()
{
Stats.setTitle("Stats");
Stats.setResizable(false);
Stats.setBounds(15, 300, 300, 600);
Stats.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Stats.setVisible(true);
return Stats;
}
public JFrame Top() throws NullPointerException
{
panel = new JPanel();
for(int i = 0; i < 9; i++)
{
btns[i] = new JButton(String.valueOf(i));
btns[i].setText("");
}
for(int i = 0; i < btns.length; i++)
{
btns[i].addActionListener(this);
panel.add(btns[i]);
btns[i].setSize(100, 100);
}
Top.setTitle("Top Level");
Top.setResizable(false);
Top.setBounds(320, 300, 300, 300);
Top.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Top.setVisible(true);
return Top;
}
public JFrame Mid()
{
panel1 = new JPanel();
Mid.setTitle("Middle Level");
Mid.setResizable(false);
Mid.setBounds(625, 300, 300, 300);
Mid.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Mid.setVisible(true);
return Mid;
}
public JFrame Bot()
{
Bot.setTitle("Bottom Level");
Bot.setResizable(false);
Bot.setBounds(930, 300, 300, 300);
Bot.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Bot.setVisible(true);
return Bot;
}
public void actionPerformed(ActionEvent e)
{
Object source = e.getSource();
if(source == start)
{
Intro.setVisible(false);
Stats();
Top();
Mid();
Bot();
}
else
{
//
}
}
public void itemStateChanged(ItemEvent e)
{
}
public static void main(String[] args)
{
TicTacToe panel = new TicTacToe();
}
}
This post has been edited by Mastergeek666: 15 Feb, 2008 - 10:37 PM
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