关于多线程运行时的JLabel的setText()无效的问题
我的想法是利用多线程在JLabel中动态的显示时间，但是在线程运行期间没有效果，只有线程TERMINATED之后直接显示最终的结果，我很费解。其实在我的代码里的void start()方法下，显示下拉菜单的
String s = (String) JOptionPane.showInputDialog(null,CHOOSE_DIFFICULTY_TITLE,CHOOSE_DIFFICULTY_TITLE ,
JOptionPane.PLAIN_MESSAGE, new ImageIcon("icon.png"), difficulty, DIFFICULTY_EASY_TITLE);
之后就已经无效了，这里按理说线程还没有创建，怎么也会有这种问题呢？
求大神解答
代码如下
package gesture_now;Java 多线程 Swing
//This is the main window of the program
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.leapmotion.leap.Controller;
import com.leapmotion.leap.Listener;
import java.io.*;
public class MainFrame implements Strings{
JFrame mainFrame;//主窗口
int scoreNumber = 0;
int timeNumber = 0;
int roundNumber = 0;
MenuBar menuBar;//菜单栏
Menu menu1,menu2;//菜单栏两个按钮
MenuItem menu1_Start,menu1_Score,menu1_Exit;//第一个按钮下的三个按钮
MenuItem menu2_Help,menu2_About;//第二个按钮下的两个按钮
JPanel game;
JLabel gesturePic1,gesturePic2,gesturePic3,gesturePic4,gesturePic5;
JPanel score;
JLabel scoreTitle,labelScoreNumber;
JPanel bottom;
JLabel bottomTimeTitle,bottomTimeNumber,bottomRoundTitle,bottomRoundNumber;
Icon icon = new ImageIcon("DownGray.png");
ScoreBoardFrame sbf;
ScoreBoardMenu sbm;
ControllerListener controllerListener;
Controller controller;
public MainFrame(){
controllerListener = new ControllerListener();
controller = new Controller();
controller.addListener(controllerListener);
sbf = new ScoreBoardFrame();
sbm = new ScoreBoardMenu();
mainFrame = new JFrame(GAME_TITLE);//实例化窗体对象
mainFrame.setLayout(new BorderLayout(5,5));
//创建菜单栏
menuBar = new MenuBar();
menu1 = new Menu(MENU_FILE);
menu2 = new Menu(MENU_HELP);
menu1_Start = new MenuItem(MENU_ITEM_START);
menu1_Score = new MenuItem(MENU_ITEM_SCORE);
menu1_Exit = new MenuItem(MENU_ITEM_EXIT);
menu2_Help = new MenuItem(MENU_ITEM_HELP);
menu2_About = new MenuItem(MENU_ITEM_ABOUT);
menu1.add(menu1_Start);
menu1.add(menu1_Score);
menu1.addSeparator();
menu1.add(menu1_Exit);
menu2.add(menu2_About);
menu2.addSeparator();
menu2.add(menu2_Help);
menuBar.add(menu1);
menuBar.add(menu2);
mainFrame.setMenuBar(menuBar);
//添加菜单栏监听器
menu1_Start.addActionListener(new ActionListener(){//Start监听器
public void actionPerformed(ActionEvent e){
if(!controller.isConnected()){//如果没有连接，则弹出提示消息
JOptionPane.showMessageDialog( null , DISCONNECT_INFORMATION ,DISCONNECT_TITLE , JOptionPane.ERROR_MESSAGE);
}else{
start();//开始游戏
}
}
});
menu1_Score.addActionListener(new ActionListener(){//Score监听器
public void actionPerformed(ActionEvent e){
sbm.setVisible(true);
}
});
menu1_Exit.addActionListener(new ActionListener(){//Exit监听器
public void actionPerformed(ActionEvent e){
System.exit(1);
}
});
menu2_Help.addActionListener(new ActionListener(){//Help监听器
public void actionPerformed(ActionEvent e){
JOptionPane.showMessageDialog( null , HELP_INFORMATION ,MENU_ITEM_HELP , JOptionPane.INFORMATION_MESSAGE);
}
});
menu2_About.addActionListener(new ActionListener(){//About监听器
public void actionPerformed(ActionEvent e){
JOptionPane.showMessageDialog( null , ABOUT_INFORMATION ,MENU_ITEM_ABOUT , JOptionPane.INFORMATION_MESSAGE);
}
});
mainFrame.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent arg0){
System.exit(1);
}
});
//设置分数面板
score = new JPanel(new BorderLayout(0,3));
scoreTitle = new JLabel(SCORE_TITLE,JLabel.CENTER);
Font scoreTitleFont = new Font("Arial Black",Font.PLAIN,40);
scoreTitle.setFont(scoreTitleFont);
labelScoreNumber = new JLabel(Integer.toString(scoreNumber),JLabel.CENTER);
Font scoreNumberFont = new Font("Arial Black",Font.PLAIN,60);
labelScoreNumber.setFont(scoreNumberFont);
score.add(scoreTitle, BorderLayout.NORTH);
score.add(labelScoreNumber,BorderLayout.SOUTH);
score.setBackground(Color.WHITE);
mainFrame.add(score,BorderLayout.NORTH);
//设置游戏面板
game = new JPanel(new GridLayout(1,5,3,3));
gesturePic1 = new JLabel("",icon,JLabel.CENTER);
gesturePic2 = new JLabel("",icon,JLabel.CENTER);
gesturePic3 = new JLabel("",icon,JLabel.CENTER);
gesturePic4 = new JLabel("",icon,JLabel.CENTER);
gesturePic5 = new JLabel("",icon,JLabel.CENTER);
game.add(gesturePic1);
game.add(gesturePic2);
game.add(gesturePic3);
game.add(gesturePic4);
game.add(gesturePic5);
game.setBackground(Color.WHITE);
mainFrame.add(game,BorderLayout.CENTER);
//设置底部提示栏
bottom = new JPanel(new GridLayout(1,2,5,5));
bottomTimeTitle = new JLabel(BOTTOM_TIME_TITLE,JLabel.CENTER);
bottomTimeNumber = new JLabel(Integer.toString(timeNumber),JLabel.CENTER);
bottomRoundTitle = new JLabel(BOTTOM_ROUND_TITLE,JLabel.CENTER);
bottomRoundNumber = new JLabel(Integer.toString(roundNumber),JLabel.CENTER);
Font bottomFont = new Font("Arial",Font.PLAIN,30);
bottomTimeTitle.setFont(bottomFont);
bottomTimeNumber.setFont(bottomFont);
bottomTimeNumber.setForeground(Color.RED);
bottomRoundTitle.setFont(bottomFont);
bottomRoundNumber.setFont(bottomFont);
bottom.add(bottomTimeTitle);
bottom.add(bottomTimeNumber);
bottom.add(bottomRoundTitle);
bottom.add(bottomRoundNumber);
bottom.setBackground(Color.WHITE);
mainFrame.add(bottom,BorderLayout.SOUTH);
//设置主窗体属性
mainFrame.setSize(800,480);//默认大小800
mainFrame.setBackground(Color.WHITE);//背景颜色为灰色
mainFrame.setLocation(300,200);//默认位置为300,200
mainFrame.setVisible(true);//设置窗体可见
}
void start() {
System.out.println("Start");
int time = 8;
Object[] difficulty = {DIFFICULTY_EASY_TITLE,DIFFICULTY_MEDIUM_TITLE,DIFFICULTY_HARD_TITLE};
String s = (String) JOptionPane.showInputDialog(null,CHOOSE_DIFFICULTY_TITLE,CHOOSE_DIFFICULTY_TITLE ,
JOptionPane.PLAIN_MESSAGE, new ImageIcon("icon.png"), difficulty, DIFFICULTY_EASY_TITLE);
switch(s){
case DIFFICULTY_EASY_TITLE:
time = 8;break;
case DIFFICULTY_MEDIUM_TITLE:
time = 5;break;
case DIFFICULTY_HARD_TITLE:
time = 3;break;
}
bottomTimeNumber.setText("caocaocao");
Time.time = time;
TimeCalculator tc = new TimeCalculator();
Thread x;
roundNumber = 1;
boolean flag=true;
while(3-roundNumber >= 0){
x = new Thread(tc);
x.start();
System.out.println("Number="+roundNumber);
while(flag){
flag=x.isAlive();
}
flag = true;
roundNumber++;
Time.time = time;
}
}
class TimeCalculator implements Runnable{
public void run(){
while(Time.time>=0){
synchronized(this){
try{
bottomRoundNumber.setText(Integer.toString(roundNumber));
bottomTimeNumber.setText(Integer.toString(Time.time));
Thread.sleep(1000);
}catch(Exception e){
e.printStackTrace();
}
System.out.println(Time.time--);
}
}
}
}
}
class Time{
public static int time;
public Time(int time){
Time.time = time;
}
}
class ControllerListener extends Listener{
private boolean isConnected=false;
public void onInit(Controller controller){
System.out.println("Initialized");
}
public void onConnect(Controller controller){
System.out.println("Connected");
isConnected = true;
}
public boolean isConnected(){
return isConnected;
}
}
