创建并使用一个Timer对象

JDK 1.3 (或者更高的版本) 提供了两个新类分别是java.util.Timer 和 java.util.TimerTask.
import java.util.Timer;
import java.util.TimerTask;

public class ToDo {
Timer timer;

public ToDo ( int seconds ) {
timer = new Timer ( ) ;
timer.schedule ( new ToDoTask ( ) , seconds*1000 ) ;
}

class ToDoTask extends TimerTask {
public void run ( ) {
System.out.println ( "OK, It's time to do something!" ) ;
timer.cancel ( ) ; //终止线程
}
}

public static void main ( String args [ ] ) {
System.out.println ( "Schedule something to do in 5 seconds." ) ;
new ToDo ( 5 ) ;
System.out.println ( "Waiting." ) ;
}
}

Swing也提供了一个Timer类,一个Timer对象将发送一个ActionEvent给一个注册了的监听器

import javax.swing.Timer;
import java.awt.event.*;
import java.util.*;

public class TimerDemo implements ActionListener {
Timer t = new Timer(1000,this);

TimerDemo() {
t.start();
}

public static void main(String args[]) {
TimerDemo td = new TimerDemo();
java.awt.Frame dummy = new java.awt.Frame();
dummy.setVisible(true);
}

public void actionPerformed(ActionEvent e) {
if (e.getSource() == t) {
System.out.println
("/007Being ticked " + Calendar.getInstance().getTime());
}
}
}

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