binghuo007 wrote:
请帮忙看一下该怎么修改才能运行,多谢了

import javax.swing.*;
import java.util.GregorianCalendar;
import java.awt.Font;
/**
 *
 * @author FC
 */
public class MyThread extends JFrame implements Runnable{
    JPanel panel;
    JLabel label;
    GregorianCalendar cld;
    Font font;
    String date;
    String time;
    /** Creates a new instance of MyThread */
    public MyThread() {
        panel=new JPanel();
        label=new JLabel();
        cld=new GregorianCalendar();
        font=new Font("隶书", Font.ITALIC, 30);
        getContentPane().add(panel);
        panel.add(label);
        label.setFont(font);

        MyThread th=new MyThread(); // 问题在这行

        Thread td=new Thread(th);
        td.start();
    }
    void inita(){
        date=cld.get(cld.YEAR)+"-"+(cld.get(cld.MONTH)+1)+"-"+cld.get(cld.DATE);
        time=cld.get(cld.HOUR)+":"+cld.get(cld.MINUTE)+":"+cld.get(cld.SECOND);
        label.setText("日期：" +date+ "时间："+time);
        setVisible(true);
        setSize(400,400);
        setDefaultCloseOperation(3);
    }
        public void run(){ 
            while(true){
                inita();
                try{
                  Thread.sleep(100);
                }
                catch(Exception e){
                    System.out.println;
                }
            }    
        }
    public static void main(String args[]){
        MyThread ab=new MyThread();
    }
}