Moving Bicycle in Java Applet

MoveBicycle.java

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

/**

@author Firzan Ghulam

<applet code=MoveBicycle height=300 width=1300>

</applet>

*/

public class MoveBicycle extends Applet implements Runnable,ActionListener

{

private int theta=90,theta1=270,theta2=180,theta3=360,dist=0;

Thread t;

int th=1;

Button  b1,b2;

int x=100;

int x1=18,y1=18; //radius of a circle

int x2,y2,x3,y3,x4,y4,x5,y5;

int xx=0;

boolean flag=true ;

public MoveBicycle()

{

b1=new Button("Break");

b2=new Button("Accelarate");

add(b1);

add(b2);

b1.addActionListener(this);

b2.addActionListener(this);

t=new Thread(this);

t.start();

}

public void actionPerformed(ActionEvent e){

if(e.getActionCommand().equals("Break")){

pause();

}

else if(e.getActionCommand().equals("Accelarate")){

resume();

}

}

public void run()

{

while(flag)

{  

try

{

if(theta==360){

theta=90;

theta1=270;

theta2=180;

theta3=360;

}

else{

theta=theta+3;//line moving with the angle 3 deg

theta1=theta1+3;

theta2=theta2+3;

theta3=theta3+3;

}

if(x>=1250){

//flag=false;

x=100;

xx=0;

dist=0;

}

else{

x=x+1;

xx=xx+1;

}

Thread.sleep(10);

}catch(InterruptedException e){}

repaint();

}

}

public void paint(Graphics g)

{

x2=((int)(x1*Math.cos(theta*Math.PI/180)))-((int)(y1* Math.sin(theta*Math.PI/180)));

        y2=((int)(x1*Math.sin(theta*Math.PI/180)))+((int)(y1* Math.cos(theta*Math.PI/180)));

       

x3=((int)(x1*Math.cos(theta1*Math.PI/180)))-((int)(y1* Math.sin(theta1*Math.PI/180)));

        y3=((int)(x1*Math.sin(theta1*Math.PI/180)))+((int)(y1* Math.cos(theta1*Math.PI/180)));

       

x4=((int)(x1*Math.cos(theta2*Math.PI/180)))-((int)(y1* Math.sin(theta2*Math.PI/180)));

        y4=((int)(x1*Math.sin(theta2*Math.PI/180)))+((int)(y1* Math.cos(theta2*Math.PI/180)));

    

x5=((int)(x1*Math.cos(theta3*Math.PI/180)))-((int)(y1* Math.sin(theta3*Math.PI/180)));

        y5=((int)(x1*Math.sin(theta3*Math.PI/180)))+((int)(y1* Math.cos(theta3*Math.PI/180)));

     

//g.drawLine(110,151,900,150); //route line 

g.drawRect(80,150,1250,5);//   or route line 

g.setColor(Color.BLACK);

g.fillRect(80,150,1300,5);

//bycycle structure...

g.drawOval(x,100,50,50);

g.drawOval(x,100,49,49);

g.drawOval(x,100,48,48);

g.drawOval(x,100,47,47);

g.drawOval(x+100,100,50,50);

g.drawOval(x+100,100,49,49);

g.drawOval(x+100,100,48,48);

g.drawOval(x+100,100,47,47);

g.drawLine(x+25,125,x+125,125);

g.drawLine(170+xx,50,225+xx,125);

g.drawLine(140+xx,80,185+xx,30);

 

g.setColor(Color.RED);

g.drawLine(125+xx,125 ,125-y2+xx,125+x2);//spoke 1//tyre 1

g.setColor(Color.RED);

g.drawLine(125+xx,125,125-y3+xx,125+x3);//spoke 2//tyre 1

g.setColor(Color.BLUE);

g.drawLine(125+xx,125,125-y4+xx,125+x4);//spoke 1//tyre 1

g.setColor(Color.BLUE);

g.drawLine(125+xx,125,125-y5+xx,125+x5);//spoke 2//tyre 1

g.setColor(Color.RED);

g.drawLine(225+xx,125 ,225-y2+xx,125+x2);//spoke 1//tyre 2

g.setColor(Color.RED);

g.drawLine(225+xx,125,225-y3+xx,125+x3);//spoke 2//tyre 2

g.setColor(Color.BLUE);

g.drawLine(225+xx,125,225-y4+xx,125+x4);//spoke 1//tyre 2

g.setColor(Color.BLUE);

  g.drawLine(225+xx,125,225-y5+xx,125+x5);//spoke 2//tyre 2

g.drawOval(xx+120,120,10,10);// small wheel for tyre 1

g.setColor(Color.BLACK); 

g.fillOval(xx+120,120,11,11);

g.drawOval(xx+220,120,10,10);//small wheel for tyre 2

g.setColor(Color.BLACK);

g.fillOval(xx+220,120,11,11);

g.setColor(Color.RED);

g.drawString("Distance=>  "+String.valueOf(dist)+ " Meter",200,30);

if(x%100==0){

dist++;

}

}

public void pause(){

flag=false;

}

public void resume(){

th=1;

flag=true;

t=new Thread(this);

System.out.println(th++);

t.start();

}

}