SwingAnimator

[hao90]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SwingAnimation{
  Thread th;
  ImageIcon images;
  JFrame frame;
  JLabel lbl;
  int i = 0;
  int j;

  public static void main(String[] args){
    SwingAnimation sa = new SwingAnimation();
  }

  public SwingAnimation(){
    frame = new JFrame("Animation Frame");
    th = new Thread();
    lbl = new JLabel();
    Panel panel = new Panel();
    panel.add(lbl);
    frame.add(panel, BorderLayout.CENTER);
    frame.setSize(400, 400);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    for(j = 1; j <= 2; j++){
      SwingAnimator();
      if (j == 2)
        j = 0;
    }
  }

  public void SwingAnimator(){
    try{
      for(i = 1; i <= 5; i++){
        images = new ImageIcon("images/img" + i + ".gif");
        lbl.setIcon(images);
        th.sleep(1000);
      }
    }
    catch(InterruptedException e){}
  }
}

Can anyone explain this part for me? I just can't get it.. :

public void SwingAnimator(){
    try{
      for(i = 1; i <= 5; i++){
        images = new ImageIcon("images/img" + i + ".gif");
        lbl.setIcon(images);
        th.sleep(1000);
      }
    }
    catch(InterruptedException e){}
  }
}

Thanks for advances~

[mKorbel]

images are changed every second

th.sleep(1000);

isn't correct and good idea use of Thread.sleep(int dealy) for Swing, instead of sleep I'd prefer to use java.swing.Timer

[hao90]

images are changed every second

th.sleep(1000);

isn't correct and good idea use of Thread.sleep(int dealy) for Swing, instead of sleep I'd prefer to use java.swing.Timer

Actually i get this from some tutorial website..
How about this line ?

images = new ImageIcon("images/img" + i + ".gif");

[JamesCherrill]

reads files images/img1.gif images/img2.gif images/img3.gif etc
and uses them to create graphical icons that can be displayed in a JLabel

[mKorbel]

this code doesn't reads any ImageIcons and I think that doesn't generated any exceptions (API) from null imageIcon, that's all for this code

[JamesCherrill]

That's right. If new ImageIcon fails it doesn't throw anything, it just returns null, which is really dumb.

[hao90]

That's right. If new ImageIcon fails it doesn't throw anything, it just returns null, which is really dumb.

Sorry but i just a beginner on java =(..Do you got better coding for this? And where u guys go and learn these?

[JamesCherrill]

Do you got better coding for this?

Not really - just check for the ImageIcon not being null

And where u guys go and learn these?

The secret is to write lots and lots of programs, then use Google and DaniWeb (in that order) when you get stuck