Question

我使用以下代码在线程中实现同步

package pkg.com.thread1;

public class Demo4 {

/**
 * @param args
 */

private static int count = 1;

public synchronized static void increment()
{
    count++;
}

public static void main(String[] args) {
    // TODO Auto-generated method stub

    Thread t1 = new Thread(new Runnable() {

        @Override
        public void run() {
            for (int i = 1; i <= 10000; i++)
            {
                increment();
            }
            // TODO Auto-generated method stub

        }
    });

    Thread t2 = new Thread(new Runnable() {

        @Override
        public void run() {
            for (int i = 1; i <= 10000; i++)
            {
                increment();
            }
            // TODO Auto-generated method stub

        }
    });

 t1.start();
 t2.start();

 try {
    t1.join();
    t2.join();
} catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

System.out.println("Count is : "+count);    

}

}

每次我运行代码时，我都会得到不同的输出。任何人都可以帮忙吗？我错过了什么吗？

Answer 1

而不是Synchronized方法over Count变量将count变量声明为Atomic Integer，如下所示。import java.util.concurrent.atomic.AtomicInteger;。它会解决你的问题。不要忘记包含{{1}}

Java查询：线程同步问题

1 个答案: