gameapplet.java

一个java的游戏程序

import java.awt.*; 
import java.awt.event.*;
import java.applet.*;

public class GameApplet
    extends Applet
    implements ActionListener
{
    // data

    private Games _games;
    private RulesFrame _rulesWindow; 

    // menus

    private PopupMenu _fileMenu;
    private MenuItem _newItem;
    private MenuItem _exitItem;

    private PopupMenu _helpMenu;
    private Menu _aboutMenu;
    private MenuItem _rulesItem;
    private MenuItem _ticRulesItem;

    private PopupMenu _gameMenu;
    private MenuItem _tictactoeItem;
    
    private MenuItem _aboutItem;

    // buttons
    
    private Panel _buttonPanel;
    private Button _fileButton;
    private Button _helpButton;

    // initialization

    public void init() { 

	setLayout(new BorderLayout());
	
	// buttons

	_buttonPanel = new Panel(new FlowLayout(FlowLayout.LEFT));
	add(_buttonPanel, "North");

	// File menu

	_fileButton = new Button("File");
	_fileButton.addActionListener(this);
	_buttonPanel.add(_fileButton);

	_fileMenu = new PopupMenu("File");
	add(_fileMenu);

	_newItem = new MenuItem("New");
	_fileMenu.add(_newItem);

	_exitItem = new MenuItem("Exit");
	_fileMenu.add(_exitItem);

	_fileMenu.addActionListener(this);

	// Help menu

	_helpButton = new Button("Help");
	_helpButton.addActionListener(this);
	_buttonPanel.add(_helpButton);

	_helpMenu = new PopupMenu("Help");
	_helpMenu.addActionListener(this);
	add(_helpMenu);

	_rulesItem = new MenuItem("Rules");
	_helpMenu.add(_rulesItem);
	
	_aboutMenu = new Menu("About");
	_helpMenu.add(_aboutMenu);

       	_aboutItem = new MenuItem("Created by Eelco Visser, 1999, 2000");
	_aboutMenu.add(_aboutItem);

	// game	
	_games = new Games();
	play("TicTacToe");
    }

    // start a game

    public void play(String name)
    {
	Game game;

	if(!(_games.isCurrent(name)))
	    {
		game = _games.getCurrent();
		if(game != null)
		    remove(game);
		
		game = _games.select(name);
		
		if(game != null)
		    {
			Dimension d = game.getSize();
			add(game, "Center");
			resize(d.width,d.height + 70);
		    }
	    }
    }

    /**
     * Sets up actions to be performed when mouseclicks are detected
     * on the menuitems.
     */
    public void actionPerformed(ActionEvent e)
    {
	if(e.getActionCommand() == "File")
	    {
		_fileMenu.show(this, 5, 5);
	    }
	else if(e.getActionCommand() == "New")
	    {
		if(_games.getCurrent() != null)
		    _games.getCurrent().newGame();
	    }
	else if(e.getActionCommand() == "Exit")
	    {
	    }
	else if(e.getActionCommand() == "Help")
	    {
		_helpMenu.show(this, 45, 5);
	    }
	else if(e.getActionCommand() == "About")
	    {
	    }
	else if(e.getActionCommand() == "Rules")
	    {
		_rulesWindow = new RulesFrame(_games);
	    }
	else 
	    {
		play(e.getActionCommand());
	    }
    }

}