面试题--三个线程循环打印ABC10次的几种解决方法-Condition(3)

面试题--三个线程循环打印ABC10次的几种解决方法-Condition(3)

package com.ces.myThread;

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

public class ConditionExample {
    private Lock lock = new ReentrantLock();
    private Condition conditionA = lock.newCondition();
    private Condition conditionB = lock.newCondition();
    private Condition conditionC = lock.newCondition();
    private String name = "A";


    public class ThreadA implements Runnable {
        @Override
        public void run() {
            for (int i = 0; i < 2; i++) {
                lock.lock();
                try {
                    while (!"A".equals(name)) {
                        try {
                            conditionA.await();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }

                    System.out.print(name);
                    name = "B";
                    conditionB.signal();
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    lock.unlock();
                }
            }
        }
    }

    public class ThreadB implements Runnable {
        @Override
        public void run() {
            int count = 3;
            for (int i = 0; i < 3; i++) {
                lock.lock();
                try {
                    while (!"B".equals(name)) {
                        try {
                            conditionB.await();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }

                    System.out.print(name);
                    name = "C";
                    conditionC.signal();
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    lock.unlock();
                }
            }
        }
    }

    public class ThreadC implements Runnable {
        @Override
        public void run() {
            for (int i = 0; i < 3; i++) {
                lock.lock();
                try {
                    while (!"C".equals(name)) {
                        try {
                            conditionC.await();
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                    }

                    System.out.println(name);
                    name = "A";
                    conditionA.signal();
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    lock.unlock();
                }
            }
        }
    }

    public static void main(String[] args) {
        ConditionExample conditionExample = new ConditionExample();
        new Thread(conditionExample.new ThreadA()).start();
        new Thread(conditionExample.new ThreadB()).start();
        new Thread(conditionExample.new ThreadC()).start();
    }
}