JAVA中怎么使用Lock与Condition实现排它同步通信

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package com.study;import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.Lock;import java.util.concurrent.locks.ReentrantLock;public class Demo {  public static void main(String[] args) {    Demo demo = new Demo();    final OutPutClass putPutClass = demo.new OutPutClass();    Thread thread = new Thread(new Runnable() {      @Override      public void run() {        while (true) {          putPutClass.ins();        }      }    });    thread.start();    Thread thread2 = new Thread(new Runnable() {      @Override      public void run() {        while (true) {          putPutClass.des();        }      }    });    thread2.start();  }  class OutPutClass {    Lock lock = new ReentrantLock();    Condition condition = lock.newCondition();    private boolean isSync = true;    public void ins() {      lock.lock();      try {        while (!isSync) {          condition.await();        }        Thread.sleep(1000L);        System.out.println("正在上传中....");        isSync = false;        condition.signal();      } catch (InterruptedException e) {        e.printStackTrace();      } finally {        lock.unlock();      }    }    public void des() {      lock.lock();      try {        while (isSync) {          condition.await();          Thread.sleep(1000L);        }        System.out.println("下载结束....");        isSync = true;        condition.signal();      } catch (InterruptedException e) {        e.printStackTrace();      } finally{        lock.unlock();      }    }  }}

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