dynamic update time

Today, I just need to get a time to update the relevant programs. By the way, I will record it. Newbies, please give me more advice.
Below is the code

package test;
import java.awt.Dimension;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class New extends JFrame
{
    
    
	private JPanel timePanel;
	private JLabel timeLabel;
	private JLabel displayArea;
	private String time;
	private int ONE_SECOND = 1000;	// 更新时间周期(1s)
 
	public static void main(String arg[])
	{
    
    
		New timeFrame=new New();
		timeFrame.setVisible(true); 
	} 
	public New()
	{
    
    
		timePanel = new JPanel();
		timeLabel = new JLabel("当前时间: ");
		displayArea = new JLabel();
  
		configTimeArea();	// 调用更新时间函数
  
		timePanel.add(timeLabel);	// 添加说明标签
		timePanel.add(displayArea);	//添加时间
		this.add(timePanel);
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setSize(new Dimension(200,70));
		this.setLocationRelativeTo(null);
	}
  
	private void configTimeArea() {
    
    
		Timer tmr = new Timer();
		tmr.scheduleAtFixedRate(new JLabelTimerTask(),new Date(), ONE_SECOND);
	}
  
	protected class JLabelTimerTask extends TimerTask{
    
    
		// 时间格式化
		SimpleDateFormat dateFormatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		@Override
		public void run() {
    
    
			// 使用Calendar方法获得时间
			time = dateFormatter.format(Calendar.getInstance().getTime());
			displayArea.setText(time);
		}
	}

}

operation result