/*
   Chapter 6.6:   MyClass
   Programmer:    Brad Shedd
   Date:          July 17, 2006
   Filename:      MyClass.java
   Purpose:       This Program displays names of classes.
*/

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

public class MyClasses extends Frame implements ActionListener
{
   private Button keys[];
   private Panel keypad;
   private TextField lcd;
   private boolean foundKey;

   public MyClasses()
   {

      //construct components and initialize beginning values
      lcd = new TextField (20);
         lcd.setEditable(false);
      keypad = new Panel();
      keys = new Button[9];

      //construct and assing captions to the Buttons

      keys[0] = new Button("173");
      keys[1] = new Button("105");
      keys[2] = new Button("106");
      keys[3] = new Button("112");
      keys[4] = new Button("250");
      keys[5] = new Button("251");
      keys[6] = new Button("252");
     keys[7] = new Button("2421");
      keys[8] = new Button("2441");

      //set Frame and keypad layout to grid layout
      setLayout(new BorderLayout());
      keypad.setLayout(new GridLayout(3,3,10,10));

      for (int i=0; i<=2; i++)
         keypad.add(keys[i]);

      for (int i=3; i<=5; i++)
         keypad.add(keys[i]);

      for (int i=6; i<=8; i++)
         keypad.add(keys[i]);

      for (int i=0; i<keys.length; i++)
         keys[i].addActionListener(this);

      add(lcd, BorderLayout.NORTH);
      add(keypad, BorderLayout.CENTER);

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

   } // end of constructor method

   public void actionPerformed(ActionEvent e)
   {
  //test for button clicks
         foundKey = false;

         //search for the clicked key
         for (int i=0; i<keys.length && !foundKey; i++)
         {
            if(e.getSource() == keys[i])
            {
               foundKey=true;
               switch(i)
               {
                  // keys
                  case 0:
                     lcd.setText("PC Operating Systems Concepts");
                     break;
                  case 1:
                     lcd.setText("Program Design and Development");
                     break;
                  case 2:
                     lcd.setText("Computer Concepts");
                     break;
                  case 3:
                     lcd.setText("Systems Analysis and Design");
                     break;
                  case 4:
                     lcd.setText("Into to RPG");
                     break;
                  case 5:
                     lcd.setText("Advanced RPG");
                     break;
                  case 6:
                     lcd.setText("Intro to Java");
                     break;
                  case 7:
                     lcd.setText("Intermediate Java");
                     break;
                  case 8:
                     lcd.setText("Advanced Java");
                     break;
               } //end switch
            } //end if
         }
   }//end actionperformed
   public static void main(String args[])
     {
         // set frame properties
         MyClasses f = new MyClasses();
         f.setTitle("MyClasses");
         f.setBounds(100,130,250,300);
         f.setVisible(true);
      }//end main
}// end class

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