Source of HelloGUIApp1.java

Structures and functions

public class HelloGUIApp1
class GUI1 extends Frame  

  1: //HelloGUIApp1.java
  2: //An application to display "Hello, world!" in a window.

  4: import java.awt.Frame;
  5: import java.awt.Graphics;


  8: public class HelloGUIApp1
  9: {
 10:     public static void main(String[] args)
 11:     {
 12:         GUI1 gui = new GUI1("Hello GUI Application Version 1");
 13:         gui.setSize(500, 100);
 14:         gui.setVisible(true);
 15:     }
 16: }


 19: class GUI1 extends Frame  //which in turn extends Window
 20: {
 21:     public GUI1(String s)
 22:     {
 23:         super(s);
 24:     }

 26:     public void paint(Graphics g)
 27:     {
 28:         g.drawString("Hello, world!", 180, 65);
 29:     }
 30: }