华为多线程面试题解法三(Condition)

最新推荐文章于 2024-12-08 03:31:34 发布

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本文通过示例代码详细解析了华为多线程面试题目，利用Java的ReentrantLock和Condition实现两个线程交替打印数字和字母。该方案展示了如何使用Condition来精确控制线程间的交互。

										华为多线程面试题解法三(Condition)

package src.main.java.com.qqjx.thread;


/*
 * Condition本质是锁资源上不同的等待队列
 * @Auther  wangpeng
 * @Date 2021/2/2
 */

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class T09_00_lock_condition {

    public static void main(String[] args) {

        char[] aI = "1234567".toCharArray();
        char[] aC = "ABCDEFG".toCharArray();

        Lock lock = new ReentrantLock();
        Condition conditionT1 = lock.newCondition();
        Condition conditionT2 = lock.newCondition();

        new Thread(()->{
            try {
                lock.lock();

                for(char c : aI) {
                    System.out.println(c);
                    conditionT2.signal();//叫醒另一个
                    conditionT1.await();//当前的等待
                }

                conditionT2.signal();

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }

        }, "t1").start();

        new Thread(()->{
            try {
                lock.lock();

                for(char c : aC) {
                    System.out.println(c);
                    conditionT1.signal();
                    conditionT2.await();
                }

                conditionT1.signal();

            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                lock.unlock();
            }

        }, "t2").start();
    }
}

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A
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B
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C
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D
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E
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F
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G