Complete Applet

We can now put all the pieces together. Below is the complete program. Following that, you will find an anchor you can use to run the applet.

import java.applet.Applet;
import java.awt.*;

public class step4 extends Applet{

// handles menu actions 

MyFrame outerBox = new MyFrame ( this );

Panel topPanel = new Panel ( );
Panel centerPanel = new Panel ( );
Panel bottomPanel = new Panel ( );

MenuBar menuBar = new MenuBar ( );
Menu fileMenu = new Menu ("File");
Menu editMenu = new Menu ("Edit");
Menu helpMenu = new Menu ("Help");

Scrollbar scrollbarV;
Scrollbar scrollbarH;

TextField message;

CheckboxGroup checkboxGroup;
Checkbox [ ] checkbox;


  public void init ( ){

    centerPanel . setBackground (Color.white);

// *** Build Menus

    fileMenu.add ( new MenuItem ( "New" ) );
    fileMenu.add ( new MenuItem ( "Open" ) );
    fileMenu.add ( new MenuItem ( "Close" ) );
    fileMenu.add ( new MenuItem ( "Save" ) );
    fileMenu.add ( new MenuItem ( "Quit" ) );

    editMenu.add ( new MenuItem ( "Cut" ) );
    editMenu.add ( new MenuItem ( "Copy" ) );
    editMenu.add ( new MenuItem ( "Paste" ) );
    editMenu.add ( new MenuItem ( "Delete" ) );

    helpMenu.add ( new MenuItem ( "Help" ) );

    menuBar .add ( fileMenu );
    menuBar .add ( editMenu );
    menuBar .add ( helpMenu );
    menuBar .setHelpMenu ( helpMenu );

    outerBox.setMenuBar ( menuBar );

// *** Build Scrollbars and Message area

    scrollbarV = new Scrollbar (Scrollbar.VERTICAL, 0, 100, 0, 1000 );
    scrollbarH = new Scrollbar (Scrollbar.HORIZONTAL, 0, 100, 0, 1000 );

    message = new TextField ( "Messages Displayed Here", 80 );
    message.setEditable ( false );


// *** Build Checkboxes

    checkboxGroup = new CheckboxGroup ( );
    checkbox = new Checkbox [ 3 ];
    checkbox [ 0 ] = new Checkbox ( "red", checkboxGroup, false );
    checkbox [ 1 ] = new Checkbox ( "green", checkboxGroup, false );
    checkbox [ 2 ] = new Checkbox ( "blue", checkboxGroup, true );


// *** Build display

    bottomPanel.setLayout ( new BorderLayout ( ) );
    bottomPanel.add ( "North", scrollbarH );
    bottomPanel.add ( "South", message );

    outerBox. setLayout (new BorderLayout ( ) );
    outerBox.add ("Center", centerPanel);
    outerBox.add ("South", bottomPanel);
    outerBox.add ("East", scrollbarV);
    outerBox.resize (600, 500);
    outerBox. setBackground (Color.white);
    outerBox.show( );

  } // end init


  public boolean action ( Event event, Object object )  {
    if ( event.target instanceof MenuItem )  {
      if ( (event.arg).equals("New") )  {
        System.out.println ( "File Menu: New selected" );
        return true;
      }
      if ( (event.arg).equals("Open") )  {
        System.out.println ( "File Menu: Open selected" );
        return true;
      }
      if ( (event.arg).equals("Close") )  {
        System.out.println ( "File Menu: Close selected" );
        return true;
      }
      if ( (event.arg).equals("Save") )  {
        System.out.println ( "File Menu: Save selected" );
        return true;
      }
      if ( (event.arg).equals("Quit") )  {
        System.out.println ( "File Menu: Quit selected" );
        return true;
      }

      if ( (event.arg).equals("Cut") )  {
        System.out.println ( "Edit Menu: Cut selected" );
        return true;
      }
      if ( (event.arg).equals("Copy") )  {
        System.out.println ( "Edit Menu: Copy selected" );
        return true;
      }
      if ( (event.arg).equals("Paste") )  {
        System.out.println ( "Edit Menu: Paste selected" );
        return true;
      }
      if ( (event.arg).equals("Delete") )  {
        System.out.println ( "Edit Menu: Delete selected" );
        return true;
      }

      if ( (event.arg).equals("Help") )  {
        System.out.println ( "Help Menu: Help selected" );
        return true;
      }

    }  // end menuitem test
    return false;
  }  // end action

  public boolean handleEvent ( Event event )  {

  if (  (event.target instanceof Scrollbar) && ( (event.id == 
  Event.SCROLL_ABSOLUTE) || 
  (event.id == Event.SCROLL_LINE_DOWN)  || 
  (event.id == Event.SCROLL_LINE_UP) || 
  (event.id == Event.SCROLL_PAGE_DOWN) || 
  (event.id == Event.SCROLL_PAGE_UP) )  )  {

    if ( event.target == scrollbarV )  {
System.out.println ( "scrollbarV:  y = "+((Integer)event.arg).intValue() );
    return true;
    }  // end scrollbarV

    if ( event.target == scrollbarH )  {
System.out.println ( "scrollbarH:  x = "+((Integer)event.arg).intValue() );
    return true;
    }  // end scrollbarH

    return super.handleEvent ( event );
  }  // end both scrollbars

    return super.handleEvent ( event );
  }  // end handleEvent

}// end step4 

// ************************  MyFrame Class ************************

class MyFrame extends Frame  {
  Applet source;

  MyFrame ( Applet a )  {
    super ( );
    source = a;
  }  // end constructor

  public boolean action ( Event event, Object object )  {
    if ( event.target instanceof MenuItem )  {
      return source.action ( event, object );
    }  // end if
    return false;
  }  // end action

  public boolean handleEvent ( Event event )  {
    if ( event.target instanceof Scrollbar )  {
      return source.handleEvent ( event );
    }  // end if
      return super.handleEvent ( event );
  }  // end handleEvent
}  // end MyFrame 

Run the applet