GameObject类

package com.wh.game;

import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.KeyEvent;

public class Plane extends GameObject {
	boolean up, down, left, right;// 键盘控制的方向
	int speed = 20;
	boolean live = true;

	@Override
	public void printObject(Graphics g) {
		// TODO Auto-generated method stub
		if (live) {
			g.drawImage(img, (int) x, (int) y, null);
			if (up) {
				y -= speed;
			} else if (down) {
				y += speed;
			} else if (left) {
				x -= speed;
			} else if (right) {
				x += speed;
			}
		}

	}

	/**
	 * 按键的时候添加方向
	 */
	public void addDirection(KeyEvent k) {
		switch (k.getKeyCode()) {
		case KeyEvent.VK_UP:
			up = true;
			break;
		case KeyEvent.VK_DOWN:
			down = true;
			break;
		case KeyEvent.VK_LEFT:
			left = true;
			break;
		case KeyEvent.VK_RIGHT:
			right = true;
			break;
		}
	}

	/**
	 * 松键的时候删除方向
	 */
	public void delDirection(KeyEvent k) {
		switch (k.getKeyCode()) {
		case KeyEvent.VK_UP:
			up = false;
			break;
		case KeyEvent.VK_DOWN:
			down = false;
			break;
		case KeyEvent.VK_LEFT:
			left = false;
			break;
		case KeyEvent.VK_RIGHT:
			right = false;
			break;
		}
	}

	/**
	 * 初始化飞机类
	 */
	public Plane(Image img, int x, int y) {
		this.img = img;
		this.x = x;
		this.y = y;
		this.width = img.getWidth(null);
		this.height = img.getHeight(null);
	}
}