To create rainbow using drawArc

We can draw rainbow using 

1. fillArc

2. drawArc

Following code is using drawArc.

for fillArc click Here...

Code :- 

import java.applet.*;

import java.awt.*;

import java.lang.*;

/*<applet code="rainbow" height=800 width=700>

</applet> */

public class rainbow extends Applet

 {

void slep()

 {

      try {

    Thread.sleep(100);

  }  catch(InterruptedException ex) {

    Thread.currentThread().interrupt();

  }

}

public void init()

 {

}

public void paint(Graphics g) 

 {

int x,y,z;

x=0;y=50;z=100;

for(int i=0;i<200;i++)

 {

if(i%20==0)

{

Color c1=new Color(z,x,y);

x=(x+50)%255;

y=(y+70)%255;

z=(z+100)%255;

g.setColor(c1);

}

g.drawArc(400-(i),400-(i),1+(i*2),1+(i*2),0,180);

              slep();

   

}

 }

}

output:-