Example of Graphics class and Color class..

import java.awt.*;

class Test extends Frame

{

Test() {

setSize(300,300);

setVisible(true);

setLayout(null);

setTitle("hungry4java");

setBackground(Color.gray);

Color c = new Color(255,0,0);

Graphics g = getGraphics();

g.setColor(c);

g.drawString("Hello welcome to hungry4java.blogspot.com",10,290);

g.drawLine(50,50,100,100);

g.drawRect(150,150,10,10);

g.fillRect(100,100,30,30);

g.drawOval(10,10,100,100);

g.setColor(Color.green);

g.fillOval(200,200,50,50);

}

public static void main(String[] args) {

Test obj = new Test();

}

}