Swing文本字段中延迟的文本颜色更改

package test;

import java.awt.Color;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JOptionPane;import javax.swing.JTextField;import javax.swing.SwingUtilities;import javax.swing.Timer;public class BlinkColorTextField {    BlinkColorTextField() {        final JTextField blinkingText = new JTextField("Red & Blue");        ActionListener blinker = new ActionListener() { boolean isRed = true; public void actionPerformed(ActionEvent ae) {     if (isRed) {         blinkingText.setForeground(Color.BLUE);     } else {         blinkingText.setForeground(Color.RED);     }     isRed = !isRed; }        };        Timer timer = new Timer(1000, blinker);        timer.start();        JOptionPane.showMessageDialog(null, blinkingText);    }    public static void main(String[] args) {        SwingUtilities.invokeLater(new Runnable(){ public void run() {     new BlinkColorTextField(); }        });    }}