Built an applet that displays a horizontal rectangle in its center. Let the rectangle fill with color from left to right.

1.3 Built an applet that displays a horizontal rectangle in its center. Let the rectangle fill with color from left to right.

FillingRect.java

import java.applet.*;
import java.awt.*;
/*
<applet code="FillingRect.class" width=600 height=400>
</applet>
*/
public class FillingRect extends Applet
{
    public void paint(Graphics g)
    {
            Dimension d=getSize(); 
            int x = d.width/2;
            int y = d.height/2;
            g.setColor(Color.green);
            g.drawRect(x-25,y-25,100,50);
            for(int i=100;i<200;i++)
            {
                try
                {
                    Thread.sleep(30);
                    g.fillRect(i+(x-125),y-25,5,50);
                }
                catch(Exception e){}
            }
    }
}

Output

Try this code to see output with animation.

Happy Coding :)