请大家帮忙看一下
按照在线程中只改变一个已经声明的面板用repaint方法使小圆点移动的想法
进行编写但是画面仍是没有改变。
import java.awt.Color;
import java.awt.Graphics;
import java.util.ArrayList;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Game extends JFrame{
static int BeginX=50,EndX=450;
static int rabbitX=BeginX,rabbitY=100; //定义兔子的移动坐标
static int tortoiseX=BeginX,tortoiseY=300;//定以乌龟的移动坐标
static GamePanel gPanel = new GamePanel(rabbitX,rabbitY,tortoiseX,tortoiseY);
//将画面面板初始化
public Game(){
this.add(gPanel);//加入画面面板
this.setTitle("龟兔赛跑");
this.setSize(800,680);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
Race race = new Race();
race.setDistance(100);//声明比赛的长度
Racer r = new Rabbit("兔子",5,gPanel);//声明一个兔子选手
Racer t = new Tortoise("乌龟",1,gPanel);//声明一个乌龟选手
r.attend(race);//将兔子加入选手列表
t.attend(race);//将乌龟加入选手列表
race.start();//启动线程
}
public static void main(String[] args) {
new Game();//初始化画面
}
class Racer extends Thread{//选手类
String name;
Race race;
int speed;
int dis =0;//移动的距离
int isEnd =0;//判断是否结束
Racer(String name,int speed){
this.name = name;
this.speed = speed;
}
public void run() {
}
public void attend(Race r) {
race = r;
r.addRacer(this);
}
}
class Rabbit extends Racer{//兔子选手
boolean isSleep = false;
GamePanel g1;
Rabbit(String name, int speed,GamePanel g1) {
super(name, speed);
this.g1 = g1;//将Game类中声明的面板传入
}
public void run() {
while(dis<=race.getDistance()) {
dis += this.speed;
//System.out.println("兔纸走了"+dis+"米");
try {
Thread.sleep(1000);
rabbitX += (speed*4);
g1.repaint();//重绘画面但是无效
} catch (InterruptedException e) {
e.printStackTrace();
}
sleepy();
if(dis==race.getDistance()) {
isEnd=1;
}
}
}
public void sleepy() {//兔子睡觉50%的几率，一场比赛最多睡一次
if(!isSleep) {
int flag = (int)(Math.random()*2);
if(flag==1) { //兔子要睡觉了
System.out.println("----------兔子要睡觉了-----------");
int sleepTime = (int)(Math.random()*61+60);
try {
Thread.sleep(sleepTime*1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(sleepTime+"----------兔子睡醒了-------------");
isSleep = true;
}
}
}
}
class Tortoise extends Racer{//乌龟选手类
GamePanel g2;
Tortoise(String name, int speed,GamePanel g2) {
super(name, speed);
this.g2 = g2;//传入Game类声明的面板
}
public void run() {
while(dis<=race.getDistance()) {
tortoiseX += (speed*4);
dis +=speed ;
System.out.println("乌龟走了"+dis+"米");
try {
Thread.sleep(1000);
g2.repaint();//重绘但无效
} catch (InterruptedException e) {
e.printStackTrace();
}
if(dis==race.getDistance()) {
isEnd =2;
}
}
}
}
class Race{//比赛类
private int distance;//比赛距离
private ArrayList<Racer> racers= new ArrayList<Racer>();//比赛选手列表
public float getDistance() {
return distance;
}
public void setDistance(int distance) {
this.distance = distance;
}
public ArrayList<Racer> getRacers() {
return racers;
}
public void setRacers(ArrayList<Racer> racers) {
this.racers = racers;
}
//注册一个参赛者
public void addRacer(Racer racer) {
racers.add(racer);
}
public void start() {
for(Racer racer:racers) {
racer.start();
}
}
}
}
class GamePanel extends JPanel{//画面面板
int rabbitX,rabbitY,tortoiseX,tortoiseY;
GamePanel(int rabbitX,int rabbitY,int tortoiseX,int tortoiseY){
this.rabbitX = rabbitX;
this.rabbitY = rabbitY;
this.tortoiseX = tortoiseX;
this.tortoiseY = tortoiseY;
}
public void paint(Graphics g) {
//super.paint(g); //百度说这句可以刷新整个面板
g.setColor(Color.RED);
g.fillOval(rabbitX, rabbitY, 15, 15);
g.setColor(Color.BLACK);
g.fillOval(tortoiseX, tortoiseY ,15,15);
g.drawLine(600, 100, 600, 350);
g.drawString("终", 600, 120);
g.drawString("点", 600, 220);
g.drawString("线", 600,320);
}
}
