MID POINT CIRCLE

                                    

Program : 

/*<applet code = circle height=400 width= 400>

</applet>*/

import java.awt.*;

import java.applet.*;

import java.awt.event.*;

public class circle extends Applet implements ActionListener {

Label l1 = new Label("x0 = ");

Label l2 = new Label("y0 = ");

Label l3 = new Label("radius = ");

TextField t1 = new TextField(3);

TextField t2 = new TextField(3);

TextField t3 = new TextField(3);

Button bw = new Button("DRAW");

public void init(){

add(l1);

add(t1);

add(l2);

add(t2);

add(l3);

add(t3);

add(bw);

bw.addActionListener(this);

}

public void  paint(Graphics g)

{

int xc=Integer.parseInt(t1.getText());

int yc=Integer.parseInt(t2.getText());

int rad=Integer.parseInt(t3.getText());

int X=0;

int Y=rad;

int p = 5/4-rad;

while(X<Y)

{

if(p<0)

{

X++;

p=p+2*X+2+1;

}

else

{

X++;

Y--;

p = p+2*X+2+1-2*Y+2;

}

g.drawString(".",xc+X,yc+Y);

g.drawString(".",xc+Y,yc-X);

g.drawString(".",xc-Y,yc+X);

g.drawString(".",xc-X,yc+Y);

g.drawString(".",xc+X,yc-Y);

g.drawString(".",xc+Y,yc+X);

g.drawString(".",xc-Y,yc-X);

g.drawString(".",xc-X,yc-Y);

}

}

public void actionPerformed(ActionEvent aw)

{ 

repaint();

}

}