sleep() Problem

[cozsmin]

Hy i`m new to java ,studin it for 3 months;
I got a code here ; works fine , no errors , but has a weird behavior
here is the code :

 import java.awt.*; 
import javax.swing.*;
 
 
public class MultiThread {
 
 
 
    public static void main (String []args) {
 
        Frame frame = new Frame("Frame");
 
        Frame frame2 = new Frame("Frame 2");
 
        Threads t1 = new Threads ();
 
        Threads t2 = new Threads ();
 
        frame.add(t1);
 
        frame.setVisible(true);
 
        frame.setSize(400,800);
 
        frame.setLocation(100, 0);
 
        frame2.add(t2);
 
        frame2.setVisible(true);
 
        frame2.setSize(400,800);
 
        frame2.setLocation(500, 0);
 
        new Thread(t1).start();
 
        new Thread(t1).start();
        new Thread(t2).start();
        new Thread(t1).start();
        new Thread(t2).start();
    }
 
}
 
 
class Threads extends JComponent
implements Runnable {
 
 
 
    int x,y;
 
    Threads( ) {}
 
 
 
    public void run () {
 
        while (x<100) {
 
            x++;
            y++;
 
            repaint();
 
            try {
 
                Thread.sleep(23);
            }
 
            catch (Exception e){};
        }
        if (x>=100) x =0;
    }
 
    public void paint (Graphics g) {
 
        g.drawLine(x,y,x+30,y+44);
 
        }
}
 

so far so good but just compile it and u will see that the lines will just have a bigger sleep time each time a Tread.strat() begins.
S oif someone can tell me how to stop sleep to sleep more each time pls tell me

Thank in advance

[JosAH]

Hy i`m new to java ,studin it for 3 months;
I got a code here ; works fine , no errors , but has a weird behavior
here is the code :

 import java.awt.*; 
import javax.swing.*;
[ ... ]
        new Thread(t1).start();
 
        new Thread(t1).start();
        new Thread(t2).start();
        new Thread(t1).start();
        new Thread(t2).start();
 

You are starting a thread more than once on the same Components t1 and t2;
a thread draws a little line and updates its coordinates; two threads can do
more than one (when one thread is sleeing the other one advances that little
line again); that's why the line is moving faster than you'd expected.

Start just two threads, once for eact t1 and t2 and see what happens.

kind regards,

Jos

[cozsmin]

THANX MAN , i was just wondering and now i understand, and seems so logical
THANKX AGAIN

[cozsmin]

i am shure that syncronizing it will solve the problem :D

[JosAH]

i am shure that syncronizing it will solve the problem :D

If you just use one drawer thread per component you don't need any synchronization
at all; the AWT dispatcher thread (the one that manages all actual drawing)
handles it and your two Components don't interfere with each other.

kind regards,

Jos