Multithreading_How to write several timers

1: Execute the task once after a fixed time: execute the task after 1000 milliseconds (execute only once)

2: Execute the task after 5000 milliseconds, and then execute the task again every 1000 milliseconds (infinite execution)

3: Alternate regeneration : The task is executed alternately in 2 seconds and 4 seconds (infinite execution),

4: Create two cyclic alternating tasks: after 2 seconds, task A is executed. A task B is created in task A and executed 4 seconds later, and a task A is created in task B and executed 2 seconds later, and so on.

1,2,3 codes:

import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
/**
 * @author Administrator @zsw 2012-7-19 下午04:37:19
 */
public class TraditionalTimer {
    public static void main(String[] args) {
        //1:
//      test1();

        //2:
//      test2();

        //3:
        test3();
        //用于打印时间秒数
        while (true) {
            System.out.println(new Date().getSeconds());
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }


    }

    //1:固定时间后执行一次任务：1000毫秒后执行任务(只执行一次)
    public static void test1() {
        new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                // TODO Auto-generated method stub
                System.out.println("bombing!");
            }
        }, 1000);
    }

    // 2:5000毫秒后，执行任务，以后每隔1000毫秒再执行一次任务(无限执行)
    public static void test2() {
        new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                // TODO Auto-generated method stub
                System.out.println("bombing!");
            }
        }, 5000, 1000);
    }


    //3:交替再生：任务2秒4秒交替的执行(无限执行)，
    static int count = 0;
    public static void test3() {

        class MyTimerTask extends TimerTask {
            @Override
            public void run() {
                count = (count + 1) % 2;
                System.out.println("bombing!");
                new Timer().schedule(new MyTimerTask(), 2000 + count * 2000);
            }
        }
        new Timer().schedule(new MyTimerTask(), 2000);
    }

}

4 codes

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

/**
 * @author Administrator @zsw 2012-7-20 下午08:08:42
 */
public class TraditionalTime2 {

    /*
     * 创建两个循环交替任务：2秒后，A任务执行。
     * A任务里面创建一个B任务4秒后执行，B任务里面又创建一个A任务2秒后执行，，如此往复。
     *
     */
    public static void main(String[] args) {
        TraditionalTime2 t2=new TraditionalTime2();
        new Timer().schedule(t2.new A(), 2000);

         //用于打印时间秒数
        while (true) {
            System.out.println(new Date().getSeconds());
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
    class A extends TimerTask {
        @Override
        public void run() {
            System.out.println("A bombing!");
            new Timer().schedule(new B(), 4000);

        }

    }

    class B extends TimerTask {
        @Override
        public void run() {
            System.out.println("B bombing!");
            new Timer().schedule(new A(), 2000);

        }
    }
}

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