win7用本地文件做网站模板/百度客服电话号码

多线程实现的交替打印的多种实现形式。说白了就是使用java‘中的各种同步器实现这个交替打印的需求。

sync的实现方式

package com.AQS.JiaoTiDaYin;/*** @Author:XK* @Date: Created in 12:00 2022/4/20* @Description：多线程交替打印的多种实现方法 (sync)**/
public class JiaotiDayinSync {private static int counter=0;private static Object object= new Object();public static void main(String[] args) {new Thread(new Runnable() {@Overridepublic void run() {int cnt = 0;while (cnt<3){synchronized (object){if(counter%3!=0){try {object.wait();} catch (InterruptedException e) {e.printStackTrace();}}else {System.out.println("1");cnt++;counter++;}object.notifyAll();}}}}).start();new Thread(new Runnable() {@Overridepublic void run() {int cnt = 0;while (cnt<3){synchronized (object){if(counter%3!=1){try {object.wait();} catch (InterruptedException e) {e.printStackTrace();}}else {System.out.println("2");cnt++;counter++;}object.notifyAll();}}}}).start();new Thread(new Runnable() {@Overridepublic void run() {int cnt = 0;while (cnt<3){synchronized (object){if(counter%3!=2){try {object.wait();} catch (InterruptedException e) {e.printStackTrace();}}else {System.out.println("3");cnt++;counter++;}object.notifyAll();}}}}).start();}
}

lock类 ReentrantLock的实现方式

package com.AQS.JiaoTiDaYin;import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;/*** @Author:XK* @Date: Created in 12:10 2022/4/20* @Description：lock实现  ReentrantLock实现**/
public class Lock123 {private static int state = 0;private static Lock lock= new ReentrantLock();public static void main(String[] args) {new Thread(new Runnable() {@Overridepublic void run() {for (int i = 0; i < 3;) {lock.lock();try {while (state%3==0){System.out.println(1);state++;i++;}}finally {lock.unlock();}}}}).start();new Thread(new Runnable() {@Overridepublic void run() {for (int i = 0; i < 3;) {lock.lock();try {while (state%3==1){System.out.println(2);state++;i++;}}finally {lock.unlock();}}}}).start();new Thread(new Runnable() {@Overridepublic void run() {for (int i = 0; i < 3;) {lock.lock();try {while (state%3==2){System.out.println(3);state++;i++;}}finally {lock.unlock();}}}}).start();}
}

semaphore信号量实现

package com.AQS.JiaoTiDaYin;import java.util.concurrent.Semaphore;/*** @Author:XK* @Date: Created in 14:41 2022/4/20* @Description：**/
public class Sema123 {private static Semaphore A = new Semaphore(1);private static Semaphore B = new Semaphore(0);private static Semaphore C = new Semaphore(0);public static void main(String[] args) {new Thread(new Runnable() {@Overridepublic void run() {for (int i = 0; i < 3; i++) {try {A.acquire();System.out.println(1);B.release();} catch (InterruptedException e) {e.printStackTrace();}}}}).start();new Thread(new Runnable() {@Overridepublic void run() {for (int i = 0; i < 3; i++) {try {B.acquire();System.out.println(2);C.release();} catch (InterruptedException e) {e.printStackTrace();}}}}).start();new Thread(new Runnable() {@Overridepublic void run() {for (int i = 0; i < 3; i++) {try {C.acquire();System.out.println(3);A.release();} catch (InterruptedException e) {e.printStackTrace();}}}}).start();}
}