package com.consum.test;

/**
 * 测试多线程并发
 */
public class synchronizedCode implements Runnable {

    static synchronizedCode instance = new synchronizedCode();
    static int i = 0;

    static String key = "1";

    public static void main(String[] args) throws InterruptedException {
        for (int j=0;j<5;j++){
            Thread t1 = new Thread(instance);
            t1.start();
        }

        System.out.println("线程执行结束");
    }

    @Override
    public void run() {

        String myKey;
        if (key == "1"){
            myKey = "def";
            key = "2";
        } else {
            myKey = "abc";
            key="1";
        }

        System.out.println(Thread.currentThread().getName() + ":" + myKey);

        synchronized (myKey){
            System.out.println(Thread.currentThread().getName() + "开始运行");
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println("我叫"+ Thread.currentThread().getName()+"运行结束");
        }
    }
}