problem with Threads

[yngwievanhendri]

Hello everyone , im new to this forum and to Java, i started learning it couple of weeks ago and i have a problem with Thread-Class.

i want to create a simple application("Main") that exteds Frame. in this Application i want to call a class("RectTest") that exteds Component and implements Runnable. i'Ve overriden all the methods (run() and paint()) .. the thing is when i start my application("Main") and create a "RectTest" class the Thread runs but the Graphics dont get updated.
can anyone help???

i managed to get it work when the "RectTest" in the "Main" implemented. but i dont want that i want separeted classes.

P.S. i forgot to uncomment lines (21,34,35)

Thanks

[surreal5335]

It's best to just post the code on the thread here. You will get a lot more responses bc no one will have to download anything to view it.

[yngwievanhendri]

surreal5335 Thanks for the tipp. So here is the code for

RectTest.java

package threadtest2;
import java.awt.Component;
import java.awt.Graphics;

/**
 *
 * @author a
 */
public class RectTest extends Component implements Runnable {

    APunkt oL;
    APunkt oR;
    APunkt uL;
    APunkt uR;
    APunkt center;
    Thread thread;
    boolean runOK;
    int sleepTime;

    public RectTest(APunkt oL,APunkt oR, APunkt uL, APunkt uR){
        sleepTime = 100;
        this.oL = oL;
        this.oR = oR;
        this.uL = uL;
        this.uR = uR;
        center = new APunkt();
        center = calcCenter();
        runOK = true;
        thread = new Thread(this);
        thread.start();

    }
    public APunkt calcCenter() {
        int tX = (oL.getX()+oR.getX())/2;
        int tY = (oL.getY()+uL.getY())/2;
        this.center.setX(tX);
        this.center.setY(tY);
        return this.center;
    }
    public APunkt moveStepXY(int x,int y){
        this.oL.moveStepX(x);
        this.oR.moveStepX(x);
        this.uL.moveStepX(x);
        this.uR.moveStepX(x);

        this.oL.moveStepY(y);
        this.oR.moveStepY(y);
        this.uL.moveStepY(y);
        this.uR.moveStepY(y);
        this.center = calcCenter();
        return this.center;
    }
    public APunkt moveStepY(int step) {
        this.oL.moveStepY(step);
        this.oR.moveStepY(step);
        this.uL.moveStepY(step);
        this.uR.moveStepY(step);
        this.center = calcCenter();
        return this.center;
    }
    public APunkt moveStepX(int step) {
        this.oL.moveStepX(step);
        this.oR.moveStepX(step);
        this.uL.moveStepX(step);
        this.uR.moveStepX(step);
        this.center = calcCenter();
        return this.center;
    }



    public void run() {
        int counter = 0;
        while(runOK) {
            //counter++;
            moveStepX(4);
            try {
                Thread.sleep(sleepTime);
            }
            catch(Exception e) {

            }
            if (counter < 20){
                moveStepX(4);
            }
            if ((counter > 20) && (counter < 30)) {
                moveStepY(4);
            }
            if ((counter > 30) && (counter < 40)) {
                moveStepXY(4,2);
            }
            if (counter > 40 ) {
                runOK = false;
                System.exit(1);
            }
            counter++;
            //System.out.println(counter);
            this.center.show();
            repaint();
        }
    }
    @Override
     public void paint(Graphics g) {
        // oL ->> oR
        g.drawLine(oL.getX(),oL.getY(),oR.getX(),oR.getY());
        // oR ->> uR
        g.drawLine(oR.getX(),oR.getY(),uR.getX(),uR.getY());
        // uR ->> uL
        g.drawLine(uR.getX(),uR.getY(),uL.getX(),uL.getY());
        // uL ->> oL
        g.drawLine(uL.getX(),uL.getY(),oL.getX(),oL.getY());
        this.center.show();
     }
}

and for Main.java

package threadtest2;
import java.awt.*;

/**
 *
 * @author a
 */
public class Main extends Frame {
    public Main(){
        //Frame wnd = new Frame("f");
        super("test");
        int side = 600;
        //Frame wnd = new Frame("Test");
        setSize(side,side);
        setBackground(Color.lightGray);
        setVisible(true);
    }
    public static void main(String[] args) {
        //super("Test");
        Main wnd = new Main();
        APunkt oL = new APunkt(200,200);
        APunkt oR = new APunkt(300,200);
        APunkt uL = new APunkt(200,100);
        APunkt uR = new APunkt(200,200);
        RectTest r = new RectTest(oL,oR,uL,uR);

    }

}

if anyone could help i will be very gratefull. Thanks