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  • 5.lock 锁

    中断: 线程实例.interrupt();
    lock锁的使用
    package com.jlong;
     
    import java.util.concurrent.locks.Condition;
    import java.util.concurrent.locks.Lock;
    import java.util.concurrent.locks.ReentrantLock;
     
     
    class User {
        public String name;
        public String sex;
     
        public boolean flag = false;
     
        public Lock lock = new ReentrantLock();
     
        public Condition conditionLock = lock.newCondition();
    }
     
    class InputThread extends Thread {
        private User user;
     
        public InputThread(User user) {
            this.user = user;
        }
     
        int cout = 0;
     
        @Override
        public void run() {
     
            while (true) {
    //加锁
                user.lock.lock();
                if (user.flag) {
                    try {
    //线程等待
                        user.conditionLock.await();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                try {
                    if (cout == 0) {
                        user.name = "jLong";
                        user.sex = "男";
                    } else {
                        user.name = "燕子";
                        user.sex = "女";
                    }
                    cout = (cout + 1) % 2;
                    user.flag = true;
    //唤醒一个在 await()等待队列中的线程。与Object.notify()相似
                    user.conditionLock.signal();
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
    //解锁
                    user.lock.unlock();
                }
     
     
            }
        }
    }
     
    class OutputThread extends Thread {
     
     
        private User user;
     
        public OutputThread(User user) {
            this.user = user;
        }
     
        @Override
        public void run() {
            while (true) {
                user.lock.lock();
                if (!user.flag) {
                    try {
                        user.conditionLock.await();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                try {
                    System.out.println(user.name + "--" + user.sex);
                    user.flag = false;
                    user.conditionLock.signal();
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    user.lock.unlock();
                }
     
     
            }
        }
    }
     
    public class ThreadDemo {
        public static void main(String[] args) {
            User user = new User();
            InputThread inputThread = new InputThread(user);
            OutputThread outputThread = new OutputThread(user);
            inputThread.start();
            outputThread.start();
        }
    }
     
     
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  • 原文地址:https://www.cnblogs.com/goldlong/p/10953878.html
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