Thread: Animation

Hi guys,

I would like to run a simple animation by pressing the run button. but It does not work and I don't know what is wrong with my code. I appreciate your help.

Iman

 
import javax.swing.*;
import java.awt.*; 
import java.awt.event.*; 
 
 
public class SimpleAnimation {
	JFrame frame; 
	JButton Animate;
	MyDrawPanel md;
	int x=70; 
	int y=70; 
 
	public static void main(String [] args){ 
 
		SimpleAnimation gui=new SimpleAnimation(); 
 
		gui.go(); 
 
	}
 
	public void go(){ 
 
		frame=new JFrame(); 
		JButton Animate=new JButton("Run"); 
 
 
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
 
		md=new MyDrawPanel(); 
 
		frame.getContentPane().add(BorderLayout.SOUTH,Animate); 
 
		frame.getContentPane().add(md); 
 
		Animate.addActionListener(new ButtonListener()); 
 
 
		frame.setSize(500,500);
		frame.setVisible(true); 
 
 
 
	}
 
	class ButtonListener implements ActionListener{ 
			public void actionPerformed(ActionEvent event){ 
				for(int i=0;i<130;++i){ 
 
					x++; 
					y++; 
 
					md.repaint(); 
 
					try{ 
						Thread.sleep(50); 
 
					}
					catch(Exception ex){}
 
				}
			}
	}
 
	class MyDrawPanel extends JPanel{ 
 
		public void paintComponent(Graphics g){ 
 
			Graphics2D g2d=(Graphics2D) g; 
 
			g2d.setColor(Color.white);
			g2d.fillRect(0, 0, this.getWidth(), this.getHeight()); 
 
			g2d.setColor(Color.green); 
 
			g2d.fillOval(x, y, 100, 100); 
 
		}
	}
}

I would like to press the run button for running the animation ( for loop inside the buttonlistener). If you copy that for loop inside the go method, its work perfectly but inside the buttonlistener it s not working.

Originally Posted by Norm

There are many ways for a program to "not work". Can you explain what the program does?

Please edit your post and wrap your code with
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.

If I add that for loop to gui.go(). it works. it shows a circle that move from x=0,y=0 to x=130,y=130. but I would like to do this when I press the run button.

I don't know how I can fix this. I appreciate if you can help me.