[Blackat]

E' un po' rozzo...ma funziona....

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
import javax.swing.event.*;

import java.util.TimerTask;
import java.util.Timer;

public class BlinkTextField extends JTextField {
	
	private final Timer timer = new Timer();
	private Color oldColor;
	private Color saveColor;
	public BlinkTextField() {
		oldColor = Color.WHITE;
		startBlink();
	}
	public void startBlink() {
		
		SwingTimerTask updatePanTask = new SwingTimerTask() {
		public void doRun() {
		    blink();
		    repaint();
		    
		}
	    };
	    int tempoDiBlink = 500; // In millisecondi
	 

	    timer.schedule(updatePanTask, 0,tempoDiBlink);
	}
	
	public void blink() {
		
		saveColor = this.getForeground();
		this.setForeground(oldColor);
		oldColor = saveColor;
	}
}

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;
import javax.swing.event.*;

import java.util.TimerTask;
import java.util.Timer;

public abstract class SwingTimerTask extends java.util.TimerTask {
	public abstract void doRun();
	public void run() {
	    if (!EventQueue.isDispatchThread()) {
		EventQueue.invokeLater(this);
	    } else {
		doRun();
	    }
	}
    }