FlashingText.java閃滅文字

/* @description: 閃滅文字
* @source: Introduction to Java Programming Sixth Edition,Y.DANIEL LIANG
* @chapter: MultiThreading, p.806
**/
import java.awt.*;
import javax.swing.*;

public class FlashingText extends JFrame implements Runnable {
  public static final String welcomeMessage = "Welcome to WindFlyer\'s CyberSpace.";
  private JLabel lblText = new JLabel(welcomeMessage);
  Container contentPane;
  public FlashingText() {
      super("FlashingText Demo");
      contentPane = getContentPane();
      contentPane.add(lblText);
   
  }
  public void run() {
      try {
          while(true) {
              if(lblText.getText() == null) {
                  lblText.setText(welcomeMessage);
              }else {
                  lblText.setText(null);
              }
                  Thread.sleep(370);
          }
      }catch(InterruptedException iE) {
          iE.printStackTrace();
      }
  }
  public static void main(String args[]) {
      FlashingText text = new FlashingText();
      text.setSize(225 , 100);
      text.setLocation(300 , 300);
      text.setVisible(true);
      text.setResizable(false);
      text.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   
      Thread flashThread = new Thread(text);
      flashThread.start();
   
  }

}