Extending the Thread Class
Here's the code for this applet:
TH1.java:
<![CDATA[
//Thread Example One:
// Extending Thread Class
import java.awt.*;
import java.applet.*;
public class TH1 extends Applet{
Thread bt; //declare the thread
Image offI;
Dimension d;
int x=10;
public void init(){
d = getSize();
offI = createImage(d.width, d.height);
bt = new BALL_THREAD(this); //initiate the thread
bt.start(); //start the thread running
}
public void mvX(int i){
// this method is called by the Thread class
x+=i;
repaint();
}
public void update(Graphics g){
paint(g);
}
public void paint(Graphics g){
Graphics offG = offI.getGraphics();
offG.setColor(Color.yellow);
offG.fillRect(0,0,d.width,d.height);
offG.setColor(Color.blue);
offG.fillOval(x,40,40,40);
g.drawImage(offI,0,0,this);
}
}
]]>
BALL_THREAD.java:
<![CDATA[
public class BALL_THREAD extends Thread{
TH1 app;
int x;
BALL_THREAD(TH1 th1){
app = th1;
}
public void run(){
boolean move_rt = true;
while(true){
if(move_rt && app.x>390){
move_rt = false;
}
if(!move_rt && app.x<5){
move_rt = true;
}
if(move_rt) app.mvX(3);
else app.mvX(-3);
try{
Thread.sleep(100);
}catch(InterruptedException e){};
}
}
}
]]>