tank.java

坦克大战的初级模型1.0 坦克大战的初级模型1.0

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

public class Tank {
	public static final int XSPEED = 5;
	public static final int YSPEED = 5;
	private int x,y;
	private boolean bL = false,bU = false,bR = false,bD = false;
	
	enum Direction {L,LU,U,RU,R,RD,D,LD,STOP}
	private Direction dir = Direction.STOP;
	
	public Tank(int x, int y) {
		this.x = x;
		this.y = y;
	}
	
	public void draw(Graphics g) {
		Color c = g.getColor();
		g.setColor(Color.RED);
		g.fillOval(x, y,30, 30);
		g.setColor(c);
		
		move();
	}
	
	void move() {
		switch(dir) {
		case L:
			x -= XSPEED;
			break;
		case LU:
			x -= XSPEED;
			y -= YSPEED;
			break;
		case U:
			y -= YSPEED;
			break;
		case RU:
			x += XSPEED;
			y -= YSPEED;
			break;
		case R:
			x += XSPEED;
			break;
		case RD:
			x += XSPEED;
			y += YSPEED;
			break;
		case D:
			y += YSPEED;
			break;
		case LD:
			x -= XSPEED;
			y += YSPEED;
			break;
		case STOP:
			break;
		}
	}
	
	public void keyPressed(KeyEvent e) {
		int  key = e.getKeyCode();
		switch(key) {
		case KeyEvent.VK_LEFT :
			bL = true;
			break;
		case KeyEvent.VK_UP :
			bU = true;
			break;
		case KeyEvent.VK_RIGHT :
			bR = true;
			break;
		case KeyEvent.VK_DOWN :
			bD = true;
			break;
		}
		locateDirection();
	}
	
	void locateDirection() {
		if(bL && !bU && !bR && !bD) dir = Direction.L;
		else if(bL && bU && !bR && !bD) dir = Direction.LU;
		else if(!bL && bU && !bR && !bD) dir = Direction.U;
		else if(!bL && bU && bR && !bD) dir = Direction.RU;
		else if(!bL && !bU && bR && !bD) dir = Direction.R;
		else if(!bL && !bU && bR && bD) dir = Direction.RD;
		else if(!bL && !bU && !bR && bD) dir = Direction.D;
		else if(bL && !bU && !bR && bD) dir = Direction.LD;
		else if(!bL && !bU && !bR && !bD) dir = Direction.STOP;
	}

	public void keyReleased(KeyEvent e) {
		int  key = e.getKeyCode();
		switch(key) {
		case KeyEvent.VK_LEFT :
			bL = false;
			break;
		case KeyEvent.VK_UP :
			bU = false;
			break;
		case KeyEvent.VK_RIGHT :
			bR = false;
			break;
		case KeyEvent.VK_DOWN :
			bD = false;
			break;
		}
		locateDirection();
	}
}