jlabeltime1.java

一个KTV管理系统

package common.currenttime;

import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Calendar;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.Timer;

public class JLabelTime1 extends JLabel{
  private static final long serialVersionUID = 1L;

  private final static int ONE_SECOND = 1000;

  public String timeStyle = "";
  public JLabelTime1(){}
  public JLabelTime1(String text) {
    
    this.setBounds(0, 0, 400, 400);
//    this.setBackground(Color.red);
    this.setFont(new Font(null,Font.BOLD,15));
    timeStyle = "yyyy-MM-dd HH:mm:ss";
    timer.start();
  }
  Timer timer = new Timer(ONE_SECOND, new ActionListener() {
    public void actionPerformed(ActionEvent evt) {
      setCurrTimeToText();
    }
  });
  public void setCurrTimeToText() {
    this.setText(getCurrTime(timeStyle));
  }
  

  public String getCurrTime(String timeStyle) {
    Calendar cal = Calendar.getInstance();
    SimpleDateFormat fromatter = new SimpleDateFormat(timeStyle);
    String strCurrTime =  fromatter.format(cal.getTime());

    return strCurrTime;
  }
  public static void main(String[] args) {
    JLabelTime time = new JLabelTime("显示时间");
    JFrame mainFrame = new JFrame();
    mainFrame.setContentPane(time);
    mainFrame.setSize(500, 400);
    mainFrame.setVisible(true);
    System.out.println(new JLabelTime1().getCurrTime("yyyy-MM-dd HH:mm:ss"));
  }
}