麻烦能不能帮我把这段代码详细的注释一下 谢谢 包括一些申明 定义什么的import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class SnakeGame{
public static void main(String[] args){
SnakeFrame frame = new SnakeFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
//----------记录状态的线程
class StatusRunnable implements Runnable{
public StatusRunnable(Snake snake,JLabel statusLabel,JLabel scoreLabel){
this.statusLabel = statusLabel;
this.scoreLabel = scoreLabel;
this.snake = snake;
}
public void run(){
String sta = "";
String spe = "";
while(true){
switch(snake.status){
case Snake.RUNNING:
sta = "Running";break;
case Snake.PAUSED:
sta = "Paused";break;
case Snake.GAMEOVER:
sta = "GameOver";break;
}
statusLabel.setText(sta);
scoreLabel.setText(""+snake.score);
try{
Thread.sleep(100);
}
catch(Exception e){
}
}
}
private JLabel scoreLabel;
private JLabel statusLabel;
private Snake snake;
}
//----------蛇运动以及记录分数的线程
class SnakeRunnable implements Runnable{
public SnakeRunnable(Snake snake,Component component){
this.snake = snake;
this.component = component;
}
public void run(){
while(true){
try{
snake.move();
component.repaint();
Thread.sleep(snake.speed);
}
catch(Exception e){
}
}
}
private Snake snake;
private Component component;
}
class Snake{
boolean isRun;//---------是否运动中
ArrayList<Node> body;//-----蛇体
Node food;//--------食物
int derection;//--------方向
int score ;
int status;
int speed;
public static final int SLOW = 500;
public static final int MID = 300;
public static final int FAST = 100;
public static final int RUNNING = 1;
public static final int PAUSED = 2;
public static final int GAMEOVER = 3;
public static final int LEFT = 1;
public static final int UP = 2;
public static final int RIGHT = 3;
public static final int DOWN = 4;
public Snake(){
speed = Snake.LOW;
score = 0;
isRun = false;
status = Snake.RUNNING;
derection = Snake.RIGHT;
body = new ArrayList<Node>();
body.add(new Node(60,20));
body.add(new Node(40,20));
body.add(new Node(20,20));
makeFood();
}
//------------判断食物是否被蛇吃掉
//-------如果食物在蛇运行方向的正前方，并且与蛇头接触，则被吃掉
private boolean isEaten(){
Node head = body.get(0);
if(derection == Snake.RIGHT && (head.x+Node.W) == food.x&&head.y == food.y )
return true;
if(derection == Snake.LEFT && (head.x-Node.W) == food.x&&head.y == food.y )
return true;
if(derection == Snake.UP && head.x == food.x&&(head.y-Node.H) == food.y )
return true;
if(derection == Snake.DOWN && head.x == food.x&&(head.y+Node.H) == food.y )
return true;
else return false;
}
//----------是否碰撞
private boolean isCollsion(){
Node node = body.get(0);