synchronized悲观锁例子,代码编译测试 - 在线编译器(yxjc123.com)

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                    import java.util.Date;
import java.util.concurrent.atomic.AtomicInteger;

public class CASExample2 extends Thread {
    public static int count = 0;

    public static long getTimeStamp(){
        Date date = new Date();
        long timestamp = date.getTime();//返回13位时间戳
        return timestamp;
    }
    //public static AtomicInteger count = new AtomicInteger();
    @Override
    public void run() {
        //循环的次数得设置大一些
        System.out.println();
        long time1 = getTimeStamp();
        for (int i=0; i<10000; i++) {
            synchronized(CASExample2.class){
                count++;
            }
            //count.incrementAndGet();

        }
        long time2 = getTimeStamp();
        System.out.println("线程 " + Thread.currentThread().getName() + "，时间差值 "+(time2-time1));
    }
    public static void main(String[] args) throws InterruptedException {

        CASExample2 task1 = new CASExample2();
        CASExample2 task2 = new CASExample2();
        task1.start();
        task2.start();
        Thread.sleep(2*1000);
        System.out.println(count);

    }
}
                

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