java 变色贪吃蛇

package org.han.snake.entities; import java.awt.Color; import java.awt.Graphics; import java.awt.Point; import java.util.HashSet; import java.util.LinkedList; import java.util.Set; import org.han.snake.SnakeListener.SnakeListener; import org.han.snake.util.Global; public class Snake { public static final int UP = -1; public static final int RIGHT = 2; public static final int DOWN = 1; public static final int LEFT = -2; private int oldDirection,newDirection; private Set<SnakeListener> listeners = new HashSet<SnakeListener>();//保存事件监听 private LinkedList<Point> body = new LinkedList<Point>(); private Point oldTail; private boolean life; public Snake() { init(); } public void init(){ int x = Global.WIDTH/2; int y = Global.HEIGHT/2; for(int i=0;i<5;i++){ body.addLast(new Point(x--,y)); } oldDirection = newDirection = RIGHT; life = true; } public void move(){ //System.out.println("Snake is moving..."); if(oldDirection + newDirection != 0){ oldDirection = newDirection; } //1.去尾 oldTail = body.removeLast(); int x = body.getFirst().x; int y = body.getFirst().y; switch(oldDirection){ case UP: y--; if(y<0){ y = Global.HEIGHT-1; } break; case RIGHT: x++; if(x>Global.WIDTH){ x = 0; } break; case DOWN: y++; if(y>Global.HEIGHT){ y = 0; } break; case LEFT: x--; if(x<0){ x = Global.WIDTH-1; } break; } //2.加头 Point newHead = new Point(x,y); body.addFirst(newHead); } public void eatFood(){ //System.out.println("Snake eat food."); body.addLast(oldTail); } public boolean isEatBody(){ for(int i=1;i<body.size();i++){ //if(body.get(i).equals(this.getHead())) if(body.get(i).x == body.getFirst().x && body.get(i).y == body.getFirst().y) return true; } return false; } public void changeDirection(int direction){ //System.out.println("snake is changeDirection"); newDirection = direction; } public void drawMe(Graphics g){ if(Global.SCORE<180){ g.setColor(Color.LIGHT_GRAY); }else if(Global.SCORE>=180&&Global.SCORE<360){ g.setColor(Color.PINK); }else if(Global.SCORE>=360&&Global.SCORE<540){ g.setColor(Color.WHITE); }else if(Global.SCORE>=540&&Global.SCORE<720){ g.setColor(Color.ORANGE); }else if(Global.SCORE>=720){ g.setColor(Color.BLACK); } for(Point p : body){ g.fill3DRect(p.x*Global.CELL_SIZE, p.y*Global.CELL_SIZE, Global.CELL_SIZE, Global.CELL_SIZE, true); } } private class SnakeThread implements Runnable{ public void run() { while(life){ move(); for(SnakeListener l : listeners){//遍历事件源 l.SnakeMoved(Snake.this); } try { Thread.sleep(150-body.size()*2); } catch (InterruptedException e) { e.printStackTrace(); } } } } public void start(){ new Thread(new SnakeThread()).start(); } public void addSnakeListener(SnakeListener l){//添加事件源 if(l!=null){ listeners.add(l); } } public Point getHead() { return body.getFirst(); } public void die() { life = false; } public LinkedList<Point> getBody() { return body; } }