IMPLEMENTATION OF DDA LINE DRAWING ALGORITHM

/*
NAME:TEJAS J GHALSASI
DATE:29TH JULY 2013
TITLE:IMPLEMENTATION OF DDA LINE DRAWING ALGORITHM IN JAVA
*/
import java.applet.*;
import java.awt.*;
import java.util.*;

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

    Scanner sc=new Scanner(System.in);
    double xc,yc;
   
    public dda(){
    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)
    {
            try{
            dx=x2-x1;
        dy=y2-y1;
    if(Math.abs(dx)>Math.abs(dy))
        steps=Math.abs(dx);
        else
        steps=Math.abs(dy);
        xc=(dx/steps);
        yc=(dy/steps);
        x=x1;
        y=y1;
    //CODED BY TEJAS GHALSASI
        for(k=1;k<=steps;k++)
        {
            x=x+xc;
            y=y+yc;
            g.fillOval((int)x,(int)y,5,5);
           
        }
    }catch(Exception e){}
    }
}
/*<applet code="dda.class" width="1000" height="1000">
 </applet>*/

 /*
 OUTPUT:
 bash-3.00$ javac dda.java
bash-3.00$ appletviewer dda.java
ENTER X1 Y1
500
200
ENTER X2 Y2
600
500
*/