本文实例为大家分享了java实现多线程交替打印两个数的具体代码，供大家参考，具体内容如下

方法1、使用wait和notify

package com.thread; public class T01 { public static void main(String[] args) { char[] char1 = "AAAAAA".toCharArray(); char[] char2 = "BBBBBB".toCharArray(); Object object = new Object(); Thread thread1 = new Thread(() -> { synchronized(object){//使用notify和wait时，必须要选获取到锁 for (int i = 0; i < char1.length; i++) { try { System.out.print(char1[i]); object.notify(); object.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } object.notify();//必须加上，否则程序无法结束，两个线程总有一个最后是wait状态，所以此处必须加 } },"t1"); Thread thread2 = new Thread( () -> { synchronized(object){ for (int i = 0; i < char2.length; i++) { try { System.out.print(char2[i]); object.notify(); object.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } object.notify(); } },"t2"); thread1.start(); thread2.start(); }}

方法2、使用LockSupport方法

package com.thread; import java.util.concurrent.locks.LockSupport; public class T02 { static Thread thread1 ; static Thread thread2 ; public static void main(String[] args) { char[] char1 = "AAAAAA".toCharArray(); char[] char2 = "BBBBBB".toCharArray(); thread1 = new Thread(() -> { for (int i = 0; i < char1.length; i++) { System.out.print(char1[i]); LockSupport.unpark(thread2); LockSupport.park(); } },"t1"); thread2 = new Thread(() -> { for (int i = 0; i < char2.length; i++) { LockSupport.park(); System.out.print(char2[i]); LockSupport.unpark(thread1); } },"t2"); thread1.start(); thread2.start(); } }

方法3、使用CAS自旋锁

package com.thread; public class T03 { enum ReadEnum{ T1, T2; } static volatile ReadEnum r = ReadEnum.T1; public static void main(String[] args) { char[] char1 = "AAAAAA".toCharArray(); char[] char2 = "BBBBBB".toCharArray(); Thread thread1 = new Thread(() ->{ for (int i = 0; i < char1.length; i++) { while (r != ReadEnum.T1) { } System.out.print(char1[i]); r = ReadEnum.T2; } },"t1"); Thread thread2 = new Thread(() ->{ for (int i = 0; i < char2.length; i++) { while (r != ReadEnum.T2) { } System.out.print(char2[i]); r = ReadEnum.T1; } },"t2"); thread1.start(); thread2.start(); }}

方法4、使用Condition方法

package com.thread; import java.util.concurrent.locks.Condition;import java.util.concurrent.locks.ReentrantLock; public class T04 { public static void main(String[] args) { char[] char1 = "AAAAAA".toCharArray(); char[] char2 = "BBBBBB".toCharArray(); ReentrantLock lock = new ReentrantLock(); Condition condition1 = lock.newCondition(); Condition condition2 = lock.newCondition(); Thread thread1 = new Thread(() ->{ try { lock.lock(); for (int i = 0; i < char1.length; i++) { System.out.print(char1[i]); condition2.signal();//唤醒线程2执行 condition1.await();//线程1等待 } condition2.signal(); }catch (Exception e) { e.printStackTrace(); }finally{ lock.unlock(); } },"t1"); Thread thread2 = new Thread(() ->{ try { lock.lock(); for (int i = 0; i < char2.length; i++) { System.out.print(char2[i]); condition1.signal(); condition2.await(); } condition1.signal(); } catch (Exception e) { e.printStackTrace(); }finally{ lock.unlock(); } },"t2"); thread1.start(); thread2.start(); }}

Condition与notify相比的好处是，Condition可以指定需要唤醒的线程，而notify是无法指定的，只能随机唤醒一个或者全唤醒(notifyAll)

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。