?? clocklabel.java
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package calculator;import java.util.Date;import java.awt.event.*;import javax.swing.*;public class ClockLabel extends JLabel implements ActionListener{ public ClockLabel() { super("" + new Date()); Timer t = new Timer(1000, this); t.start(); } public void actionPerformed(ActionEvent ae) { setText((new Date()).toString()); } }?? 快捷鍵說(shuō)明
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