final JLabel j1;j1 = new JLabel();add(j1);setVisible(true);Thread t = new Thread(new Runnable() {@Overridepublic void run(){Color color = g.getColor();g.setColor(Color.blue);j1.setText("哥?還在不?干嘛呢");g.setColor(color);try {Thread.sleep(5000);}catch (InterruptedException ex) {}j1.setText("");}});t.start();}