Java

actionPerformed won't work

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Join Date: Oct 2009

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CuteCat

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actionPerformed won't work

Nov 19th, 2009

I can't figure out what's wrong - I was remaking the code from an older and messier version, but now I've hit a roadblock because what I say in the actionPerformed section just doesn't happen.

I suspect that it's because of the Timer, which a friend adviced me to link to an empty method (NullListener). But even when I move around using the keyListener, nothing happens! Why?

(Please remember that the things currently in the actionPerformed section are only there so I can see if it works at all, so the problem can't be within the method itself.)

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 Java Syntax (Toggle Plain Text) 
import java.awt.event.*;
import javax.swing.*;
 
public class gameinit implements ActionListener
{
	public static int number;
	public static JFrame p;
	public static Timer t;
	public static JLabel Iz;
	public static char rar = 'T';
 
	public static void main(String args[])
	{
		p = new JFrame("Version 2.4");
		p.setSize(600,393);
 
		NullListener Blanky = new NullListener();
		t = new Timer(50, Blanky);
		t.start();
		Maps.map0();
		p.setVisible(true);
		p.addKeyListener(new KeyListen());
	}
 
		public void actionPerformed(ActionEvent e)
		{
			Izzy.hittable();
			Izzy.movement();
 
			if(rar == 'T')
			{
				System.out.print("Sky High(Grand Nuave)");
			}
		}
 
	static class KeyListen implements KeyListener
	{
		KeyListen(){}
 
		public void keyPressed(KeyEvent e)
		{
			if(e.getKeyCode() == 39)
			{
				number = 1;
				Controls.test(number);
			}
			if(e.getKeyCode() == 37)
			{
				number = 2;
				Controls.test(number);
			}
			if(e.getKeyCode() == 32)
			{
				number = 3;
				Controls.test(number);
			}
		}
 
		public void keyReleased(KeyEvent e)
		{
			if(e.getKeyCode() == 39 || e.getKeyCode() == 37)
			{
				char direction = Controls.test(number), dir;
				Izzy.stop(direction);
			}
		}
 
		public void keyTyped(KeyEvent e)
		{}
	}
}
import java.awt.event.*;
import javax.swing.*;

public class gameinit implements ActionListener
{
	public static int number;
	public static JFrame p;
	public static Timer t;
	public static JLabel Iz;
	public static char rar = 'T';

	public static void main(String args[])
	{
		p = new JFrame("Version 2.4");
		p.setSize(600,393);

		NullListener Blanky = new NullListener();
		t = new Timer(50, Blanky);
		t.start();
		Maps.map0();
		p.setVisible(true);
		p.addKeyListener(new KeyListen());
	}

		public void actionPerformed(ActionEvent e)
		{
			Izzy.hittable();
			Izzy.movement();

			if(rar == 'T')
			{
				System.out.print("Sky High(Grand Nuave)");
			}
		}

	static class KeyListen implements KeyListener
	{
		KeyListen(){}

		public void keyPressed(KeyEvent e)
		{
			if(e.getKeyCode() == 39)
			{
				number = 1;
				Controls.test(number);
			}
			if(e.getKeyCode() == 37)
			{
				number = 2;
				Controls.test(number);
			}
			if(e.getKeyCode() == 32)
			{
				number = 3;
				Controls.test(number);
			}
		}

		public void keyReleased(KeyEvent e)
		{
			if(e.getKeyCode() == 39 || e.getKeyCode() == 37)
			{
				char direction = Controls.test(number), dir;
				Izzy.stop(direction);
			}
		}

		public void keyTyped(KeyEvent e)
		{}
	}
}

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Join Date: Dec 2007

Posts: 2,062

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javaAddict javaAddict is offline

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Postaholic

Nov 19th, 2009

In order for this method to execute:

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
public void actionPerformed(ActionEvent e)
		{
			Izzy.hittable();
			Izzy.movement();
 
			if(rar == 'T')
			{
				System.out.print("Sky High(Grand Nuave)");
			}
		}
public void actionPerformed(ActionEvent e)
		{
			Izzy.hittable();
			Izzy.movement();

			if(rar == 'T')
			{
				System.out.print("Sky High(Grand Nuave)");
			}
		}

You need to add its listener to a component. The methods in the 'KeyListen' are executed because you do this:

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
p.addKeyListener(new KeyListen());
p.addKeyListener(new KeyListen());

When you want the actionPerformed method to execute?
Also since it it the gameinit class that implements the listener, it is an instance of that class that you will add:

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 Java Syntax (Toggle Plain Text) 
someComponent.addActionListener(new gameinit());
someComponent.addActionListener(new gameinit());

I murdered thousands for the Emperor and he gave me nothing except his damning silence. Now his lapdogs yap for every life I take, while the gods promise me the galaxy.
- Svane Vulfbad -

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Join Date: Oct 2009

Posts: 10

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CuteCat

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Nov 19th, 2009

Strangely, I tried that - but the program complains about not finding the command. When looking at my old program, I found that it didn't contain the command, and thought that no such command was needed...

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
C:\Documents and Settings\agnasp\Skrivbord\game02\gameinit.java:23: cannot find symbol
symbol  : method addActionListener(gameinit)
location: class javax.swing.JFrame
		p.addActionListener(new gameinit());
C:\Documents and Settings\agnasp\Skrivbord\game02\gameinit.java:23: cannot find symbol
symbol  : method addActionListener(gameinit)
location: class javax.swing.JFrame
		p.addActionListener(new gameinit());

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Join Date: Dec 2007

Posts: 2,062

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javaAddict javaAddict is offline

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Postaholic

Nov 19th, 2009

Check the API.

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
p.addActionListener(new gameinit());
p.addActionListener(new gameinit());

The JFrame class doesn't have such method: addActionListener.
Then search the API some more to find which elements accept an ActionListener (Buttons and such)

I murdered thousands for the Emperor and he gave me nothing except his damning silence. Now his lapdogs yap for every life I take, while the gods promise me the galaxy.
- Svane Vulfbad -