Java多线程之多线程之间按顺序调用

蔚落 2022-02-01 07:23 264阅读 0赞

# Java多线程之多线程之间按顺序调用 #

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##### 多线程之间按顺序调用，实现A->B->C #####

##### 1. 要求： #####

*  AA打印5次，BB打印10次，CC打印15次
 *  接着
 *  AA打印5次，BB打印10次，CC打印15次
 *  …来10轮

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#### 代码实现： ####

import java.util.concurrent.locks.Condition;
    import java.util.concurrent.locks.Lock;
    import java.util.concurrent.locks.ReentrantLock;
    
    class ShareResource {
        
        private int number = 1; // 1: A  2:B  3:C
        private Lock lock = new ReentrantLock();
        private Condition c1 = lock.newCondition();
        private Condition c2 = lock.newCondition();
        private Condition c3 = lock.newCondition();
    
        public void print5(int totalLoop) {
        
            lock.lock();
            try {
        
                //1.判断
                while (number !=1) {
        
                    c1.await();
                }
    //            2.干活
                for (int i = 1; i <= 5; i++) {
        
                    System.out.println(Thread.currentThread().getName() + "\t" + i+"\t totalLoop:"+totalLoop);
                }
    //            3，通知
                number =2;
                c2.signal();
            } catch (Exception e) {
        
                e.printStackTrace();
            } finally {
        
                lock.unlock();
            }
        }
    
        public void print10(int totalLoop) {
        
            lock.lock();
            try {
        
                //1.判断
                while (number !=2) {
        
                    c2.await();
                }
    //            2.干活
                for (int i = 1; i <= 10; i++) {
        
                    System.out.println(Thread.currentThread().getName() + "\t" + i+"\t totalLoop:"+totalLoop);
                }
    //            3，通知
                number =3;
                c3.signal();
            } catch (Exception e) {
        
                e.printStackTrace();
            } finally {
        
                lock.unlock();
            }
        }
    
        public void print15(int totalLoop) {
        
            lock.lock();
            try {
        
                //1.判断
                while (number !=3) {
        
                    c3.await();
                }
    //            2.干活
                for (int i = 1; i <= 15; i++) {
        
                    System.out.println(Thread.currentThread().getName() + "\t" + i+"\t totalLoop:"+totalLoop);
                }
    //            3，通知
                number =1;
                c1.signal();
            } catch (Exception e) {
        
                e.printStackTrace();
            } finally {
        
                lock.unlock();
            }
        }
    }
    
    
    public class ThreadOrderAccess {
        
        public static void main(String[] args) {
        
            ShareResource sr = new ShareResource();
    
            new Thread(() -> {
        
                for (int i = 1; i <=10 ; i++) {
        
                    sr.print5(i);
                }
            },"A").start();
    
            new Thread(() -> {
        
                for (int i = 1; i <=10 ; i++) {
        
                    sr.print10(i);
                }
            },"B").start();
    
            new Thread(() -> {
        
                for (int i = 1; i <=10 ; i++) {
        
                    sr.print15(i);
                }
            },"C").start();
    
        }
    }

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#### 多线程技巧口诀： ####

##### 1. 线程 操作 资源类 #####

##### 2. 高内聚 低耦合 #####

体会！