IMPLEMENTATION OF BRESNHAM LINE DRAWING ALGORITHM IN JAVA

/*
DATE:29TH JULY 2013
TITLE:IMPLEMENTATION OF BRESNHAM LINE DRAWING ALGORITHM IN JAVA
*/

import java.applet.*;
import java.awt.*;
import java.util.*;

public class bresnham extends Applet
{
    double x1,y1,x2,y2;
    double dx,dy,steps,x,y,k;

    Scanner sc=new Scanner(System.in);
    double xc,yc;
   
    public bresnham(){
    System.out.println("ENTER X1 Y1");
    x1=sc.nextDouble();
    y1=sc.nextDouble();
    System.out.println("ENTER X2 Y2");
    x2=sc.nextDouble();
    y2=sc.nextDouble();
    }
  
    public void paint(Graphics g)
    {
    int ch=6;
            dx=Math.abs(x2-x1);
        dy=Math.abs(y2-y1);
        x=x1;
        y=y1;
        double e=(2*dy)-(dx);
        int i=1;
        //THIS PROGRAM IS CODED BY TG6483
        one: for(int j=10;ch==6;j++)
        {
            g.fillOval((int)x,(int)y,5,5);
            while(e>=0)
            {
                y=y+1;
                e=e-(2*dx);
            }
            x=x+1;
            e=e+(2*dy);
            i++;
            if(i<=dx)
            ch=6;
            else
            break one;
        }
    }
}
/*<applet code="bresnham.class" width="1000" height="1000">
 </applet>*/
 /*
 OUTPUT:
 bash-3.00$ appletviewer bresnham.java
ENTER X1 Y1
500
200
ENTER X2 Y2
200
600

*/