Snake-Java贪吃蛇

package com.yl.snake; import java.awt.Color; import java.awt.Graphics; import java.awt.event.KeyEvent; import javax.swing.plaf.basic.BasicInternalFrameTitlePane.MoveAction; import com.sun.glass.ui.Size; import com.sun.javafx.geom.Rectangle; public class Snake { private Node headNode = null; private Node tailNode = null; private int size = 0; private Node node = new Node(20, 20, Dir.L); private Yard y; public Snake(Yard y){ this.y = y; headNode = node; tailNode = node; size = 1; } public void draw(Graphics g){ if(size <=0)return; move(); for(Node n=headNode;n!=null;n = n.nextNode){ n.draw(g); } } public void eat(Egg e){ if(this.getRect().intersection(e.getRect()).isEmpty() == false) { e.reAppear(); this.addToHead(); y.setScore(y.getScore() + 5); } } private Rectangle getRect(){ return new Rectangle(Yard.BLOCK_SIZE*headNode.col,Yard.BLOCK_SIZE*headNode.row,headNode.w,headNode.h); } private void move() { addToHead(); deleteFromTail(); checkDead(); } private void checkDead() { if (headNode.row < 2 || headNode.col < 0 ||headNode.row > Yard.ROWS || headNode.col > Yard.COLS) { y.stop(); } for(Node node = headNode.nextNode;node != null;node = node.nextNode){ if (headNode.row == node.row && headNode.col == node.col) { y.stop(); } } } private void deleteFromTail() { tailNode = tailNode.prevNode; tailNode.nextNode = null; } public void addToTail(){ Node n = null; switch(tailNode.dir){ case L: n = new Node(tailNode.row, tailNode.col + 1, tailNode.dir); break; case R: n = new Node(tailNode.row, tailNode.col - 1, tailNode.dir); break; case U: n = new Node(tailNode.row + 1, tailNode.col , tailNode.dir); break; case D: n = new Node(tailNode.row - 1, tailNode.col, tailNode.dir); break; } tailNode.nextNode = n; n.prevNode = tailNode; tailNode = n; size ++; } public void addToHead(){ Node n = null; switch(headNode.dir){ case L: n = new Node(headNode.row, headNode.col - 1, headNode.dir); break; case R: n = new Node(headNode.row, headNode.col + 1, headNode.dir); break; case U: n = new Node(headNode.row - 1, headNode.col , headNode.dir); break; case D: n = new Node(headNode.row + 1, headNode.col, headNode.dir); break; } n.nextNode = headNode; headNode.prevNode = n; headNode = n; size ++; } private class Node{ int w = Yard.BLOCK_SIZE; int h = Yard.BLOCK_SIZE; int row ,col; Dir dir = Dir.L; Node nextNode = null; Node prevNode = null; Node(int row,int col,Dir dir) { this.row = row; this.col = col; this.dir = dir; } void draw(Graphics g){ Color c = g.getColor(); g.setColor(Color.BLACK); g.fillRect(w*col, h*row, w, h); g.setColor(c); } } public void keyPressed(KeyEvent e) { int key = e.getKeyCode(); switch(key){ case KeyEvent.VK_LEFT : if (headNode.dir != Dir.R) headNode.dir = Dir.L; break; case KeyEvent.VK_RIGHT : if (headNode.dir != Dir.L) headNode.dir = Dir.R; break; case KeyEvent.VK_UP : if (headNode.dir != Dir.D) headNode.dir = Dir.U; break; case KeyEvent.VK_DOWN : if (headNode.dir != Dir.U) headNode.dir = Dir.D; break; } } }