fishcatch.java

随着手机的日益普及、Java功能在移动设备上的实现

/*
 * FishCatch.java
 *
 * Copyright 2000 JJKING Software, Junichi Ito <[e-mail]>
 * Permission to use, copy, modify, and distribute this software and its
 * documentation without fee for NON-COMMERCIAL is free.
 */
 
import com.sun.kjava.*;

/**
 * This is the main application. 
 */
public class FishCatch extends Spotlet
	implements FrameListener
{
	/**
	 * The bounds of animation field.
	 */
	static Rectangle fieldBounds = new Rectangle(2, 18, 156, 140);

	/**
	 * The key code for home key.
	 */
	static final int KEY_HOME = 264;
	
	/**
	 * The animation manager.
	 */
	AnimManager animMgr;
	
	/**
	 * The kuma.
	 */
	Kuma kuma;
	
	/**
	 * The score.
	 */
	int score;
	
	/**
	 * Creates a spotlet and registers its event handlers.
	 */
	public static void main(String[] args)
	{
		(new FishCatch()).register(WANT_SYSTEM_KEYS);
	}

	/**
	 * Create screen and start programs.
	 */
	public FishCatch()
	{
		// initialize animation manager
		animMgr = new AnimManager(fieldBounds);
		animMgr.setFrameListener(this);
		
		// init game
		initGame();
	}

	/**
	 * Initialize game.
	 */
	void initGame()
	{
		// reset animation manager
		animMgr.reset();

		// init kuma
		kuma = new Kuma();
		try { animMgr.add(kuma); }
		catch(AnimException ex) {}
	
		// reset score
		score = 0;

		// Clear and draw border.
		Graphics g = Graphics.getGraphics();
		g.clearScreen();
		g.drawBorder(fieldBounds.x
			, fieldBounds.y
			, fieldBounds.width
			, fieldBounds.height
			, g.PLAIN
			, g.borderType(4, 0, 1));
		g.drawString("Score:", 0, 0);
		addScore(0);	// just draw current score.
	}

	/**
	 * Handle a key down event.
	 */
	public void keyDown(int keyCode)
	{
		switch(keyCode) {
 		case KEY_HARD2:
			if (!kuma.isBusy()) {
 				kuma.moveLeft();
		 		animMgr.update(kuma);
			}
			break;
		case KEY_HARD3:
			if (!kuma.isBusy()) {
	 			kuma.moveRight();
		 		animMgr.update(kuma);
			}
 			break;
 		case KEY_POWER:
 		case KEY_HOME:
 			System.exit(0);	
		}
        }

	/**
	 * invoked when the animation frame is changed.
	 * @event evt the animation event.
	 */
	public void changeFrame(FrameEvent evt)
	{
		if (kuma == null) { return; }

		// reset game
		if (kuma.getState() == Kuma.STATE_HIDE) {
			initGame();
			return;
		}
		
		// check hit
		AnimChar[] animChars = animMgr.getAnimChars();
		for (int i = 0; i < animChars.length; i++) {
			if (kuma.isHit(animChars[i])) {
				if ((animChars[i] instanceof Bomb
					|| animChars[i] instanceof Fire)
					&& kuma.isLive()) {
					kuma.setState(Kuma.STATE_GROGGY);
					animChars[i].setState(AnimChar.STATE_HIDE);
					break;
				}
				if (animChars[i] instanceof Fish
					&& ((Fish)animChars[i]).isEatable()
					&& !kuma.isBusy()) {
					kuma.setState(Kuma.STATE_EAT);
					animChars[i].setState(AnimChar.STATE_HIDE);
					addScore(1);
					break;
				}
			}
		}

		// add new fish
		if (AnimManager.random(8) == 0) {
			try {
				Fish fish = new Fish();
				animMgr.add(fish);
			}
			catch(AnimException ex) {}
		}

		// add new bomb
		int r = score < 50 ? 55 - score : 5;
		if (AnimManager.random(r) == 0) {
			try {
				Bomb bomb = new Bomb();
				animMgr.add(bomb);
			}
			catch(AnimException ex) {}

		}
	}

	/**
	 * Increment the score.
	 */
	void addScore(int s)
	{
		score += s;
		Graphics g = Graphics.getGraphics();
		g.drawString(String.valueOf(score), 32, 0);
	}
}