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脚本之家。