Java多线程常用Demo

两个线程交替打印奇偶数

使用synchronized、wait、notify

三个线程交替打印ABC

使用volatile实现状态变化

public class ThreadABC extends Thread {
    private volatile static int state = 0;	// 利用state判断当前哪个线程应该打印
    private static char[] list = new char[]{'A', 'B', 'C'};
    private int type;

    public ThreadABC(int type) {
        this.type = type;
    }

    @Override
    public void run() {
        for (int i=0; i<10; ) {
            if (state % 3 == type) {
                System.out.println(list[type]);
                state++;
                i++;
            }
        }
    }

    public static void main(String[] args) {
        new ThreadABC(0).start();
        new ThreadABC(1).start();
        new ThreadABC(2).start();
    }
}

使用Lock与state状态

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