Demonstrating Colors

 import java.awt.*;
 import javax.swing.*;
 import java.awt.event.*;

 public class ShowColors extends JFrame 
 {
	 public ShowColors()
	 {
		 super( "Using colors" );

		 setSize( 400, 130 );
		 show();
	 }

	 public void paint( Graphics g )
	 {
		 // set new drawing color using integers
		 g.setColor( new Color( 255, 0, 0 ) );
		 g.fillRect( 25, 25, 100, 20 );
		 g.drawString( "Current RGB: " + g.getColor(), 130, 40 );

		 // set new drawing color using floats
		 g.setColor( new Color( 0.0f, 1.0f, 0.0f ) );
		 g.fillRect( 25, 50, 100, 20 );
		 g.drawString( "Current RGB: " + g.getColor(), 130, 65 );

		 // set new drawing color using static Color objects
		 g.setColor( Color.blue );
		 g.fillRect( 25, 75, 100, 20 );
		 g.drawString( "Current RGB: " + g.getColor(), 130, 90 );

		 // display individual RGB values
		 Color c = Color.magenta;
		 g.setColor( c );
		 g.fillRect( 25, 100, 100, 20 );
		 g.drawString( "RGB values: " + c.getRed() + ", " + c.getGreen() + ", " + c.getBlue(), 130, 115 );
	 }

	 public static void main( String args[] )
	 {
		 ShowColors app = new ShowColors();

		 app.addWindowListener( new WindowAdapter() 
		 {
			 public void windowClosing( WindowEvent e )
			 {
				 System.exit( 0 );
			 }
		 } );
	 }
 }