import java.awt.BorderLayout;
import java.awt.Container;
import java.util.Date;
import javax.swing.JButton;
import javax.swing.JFrame;

class MyFrame extends JFrame {
  JButton timeButton;

  public MyFrame() {
    setSize(400, 200);
    setEnabled(true);
    setTitle("时间表");
    Container container = getContentPane();
    timeButton = new JButton();
    container.add(timeButton, BorderLayout.CENTER);
    setVisible(true);

    String timeStr;
    String year;
    String month;
    String day;
    String hour;
    String minute;
    String second;
    while (true) {
      try {
        Thread.sleep(1000);
      } catch (InterruptedException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
      }
      Date date = new Date();
      year = String.valueOf(date.getYear() + 1900);
      month = String.valueOf(date.getMonth() + 1);
      day = String.valueOf(date.getDate());
      hour = String.valueOf(date.getHours());
      minute = String.valueOf(date.getMinutes());
      second = String.valueOf(date.getSeconds());
      timeStr = "现在时刻是：" + year + "年" + month + "月" + day + "日" + " "
          + hour + "时" + minute + "分" + second + "秒";
      timeButton.setText(timeStr);
    }
  }
}

public class TimeTest {
  public static void main(String[] args) {
    MyFrame myFrame = new MyFrame();
    myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}