java多线程实现轮流输出数字和字母-创新互联

本案例演示3个线程轮流打印输出数字字母；代码如下

package thread;

public class ThreadTest {
   public static void main(String[] args) {
     Print print = new Print();
     new Thread(()->{
       print.printNum();
     }).start();

     new Thread(()->{
       print.printZimu();
     }).start();

     new Thread(()->{
       print.printZimuLittle();
     }).start();
   }
}

package thread;

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

public class Print {
   final Lock lock = new ReentrantLock();
   final Condition num = lock.newCondition();
   final Condition zimu = lock.newCondition();
   final Condition zimuLittle = lock.newCondition();

   public void printNum(){
     lock.lock();
     try {
       for (int i=1;i<53;i++){
         System.out.print(i);
         if (i%2==0){
           zimu.signal();
           num.await();
         }
       }
     } catch (InterruptedException e) {
       e.printStackTrace();
     } finally {
       lock.unlock();
     }
   }

   public void printZimu(){
     lock.lock();
     try {
       for (int i=0;i<26;i++){
         System.out.print((char)(i+'A'));
         zimuLittle.signal();
         zimu.await();
       }
     } catch (InterruptedException e) {
       e.printStackTrace();
     } finally {
       lock.unlock();
     }
   }

   public void printZimuLittle(){
     lock.lock();
     try {
       for (int i=0;i<26;i++){
         System.out.print((char)(i+'a'));
         num.signal();
         zimuLittle.await();
       }
     } catch (InterruptedException e) {
       e.printStackTrace();
     } finally {
       lock.unlock();
     }
   }
}

最终输出结果为12aA34bB56cC78dD910eE1112fF1314gG1516hH1718iI1920jJ2122kK2324lL2526mM2728nN2930oO3132pP3334qQ3536rR3738sS3940tT4142uU4344vV4546wW4748xX4950yY5152zZ

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