多线程交替输出

Question

package com.umbrella.container.queue;

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

public class ThreadTest {
    static Lock lock = new ReentrantLock();
    static Condition w = lock.newCondition();
    static Condition n = lock.newCondition();
    static boolean isW = false;

    public void printW() {
        try {
            lock.lock();
            while (!isW) {
                w.await();
            }
            System.out.println("w");
            n.signalAll();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }

    public void printN() {
        try {
            lock.lock();
            while (isW) {
                n.await();
            }
            System.out.println("n");
            w.signalAll();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            lock.unlock();
        }
    }
    public static void main(String[] args) {
        ThreadTest t = new ThreadTest();
        new Thread(() -> {
            t.printW();
        }, "w").start();

        new Thread(() -> {
            t.printN();
        }, "n").start();
    }
}

用lock锁 想要做成两个线程交替输出 但老是搓的  哪里错了啊

Answer 1

isW的值都没动态变化过