// File: TestSwing4.java (Module 9)
//
// Author: Rahul Simha
// Created: October 13, 2000
//
// Hello world in a frame.

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

// Extend JPanel to override it's paintComponent() method:

class NewPanel extends JPanel {

    // Set background in constructor.

    public NewPanel () 
    {
	this.setBackground (Color.cyan);
    }
    
    
    // Override paintComponent():
    
    public void paintComponent (Graphics g)
    {
	// Always call super.paintComponent (g):
	super.paintComponent(g);
	
	// drawString() is a Graphics method.
	// Draw the string "Hello World" at location 100,100
	g.drawString ("Hello World!", 100, 100);
	
	// Let's find out when paintComponent() is called.
	System.out.println ("Inside paintComponent");
    }
    
}

public class TestSwing4 {
    
    public static void main (String[] argv)
    {
	// Create a frame
	JFrame f = new JFrame ();
	
	// Set the title and other parameters.
	f.setTitle ("Hello World Test");
	f.setResizable (true);
	// Background is going to be Panel's background.
	// f.getContentPane().setBackground (Color.cyan);
	f.setSize (500, 300);
	
	// Add the panel using the default BorderLayout
	NewPanel panel = new NewPanel ();
	Container cPane = f.getContentPane ();
	cPane.add (panel);
	
	// Show the frame.
	f.setVisible (true);
    }
    
}