numberrunnable.java

《Java2程序设计实用教程(第2版)》课件

//【例7.2】  声明自定义线程类实现Runnable接口实现奇数/偶数序列线程并发执行。

public class NumberRunnable implements Runnable
{
    private int k;
    
    public NumberRunnable(int k)
    {
        this.k = k;
    }

    public NumberRunnable()
    {
        this(0);
    }

    public void run()
    {
        int i = k;
        System.out.println();
        while (i<50)
        {
            System.out.print(i+"  ");
            i+=2;
        }
        System.out.println("结束！");
    }
    
    public static void main(String args[])
    {
        NumberRunnable odd = new NumberRunnable(1);        //创建具有线程体的目标对象
        Thread thread_odd = new Thread(odd,"奇数线程");    //以目标对象创建线程对象
        thread_odd.start();

        new Thread(new NumberRunnable(2),"偶数线程").start();

        System.out.println("currentThread="+Thread.currentThread().getName());//获得当前线程对象名
        System.out.println("activeCount="+thread_odd.activeCount());
    }
}


/*
程序运行结果如下：
currentThread=main
activeCount=3

1  3  5  7  9  11  13  15  17  19  21  23  25  27 29
2  4  6  8  10  12  14  16  18  20  22  24  26  28  30  32  34
  36  38  40  42  44  46  48  结束！
31  33  35  37  39  41  43  45  47  49  结束！

*/