import java.util.Random;/*** TODO 在此写上类的相关说明.<br>* @author gongqiang <br>* @version 1.0.0 2021年6月3日<br>* @see * @since JDK 1.5.0*/
public class SynchronizedDemo {/*** 中间值.*/private Integer value;/*** @param args*/public static void main(String[] args) {final SynchronizedDemo syn = new SynchronizedDemo();new Thread(() -> {while (true) {try {synchronized (SynchronizedDemo.class) {final Integer value = new Random().nextInt();syn.value = value;System.out.println("设置共享" + value);Thread.sleep(3000);}// 休眠，让获取线程能够读取共享变量.try {Thread.sleep(100);} catch (InterruptedException e) {Thread.currentThread().interrupt();}} catch (InterruptedException e) {Thread.currentThread().interrupt();}}}).start();new Thread(() -> {while (true) {synchronized (SynchronizedDemo.class) {final Integer value = syn.value;System.out.println("获取共享" + value);}// 休眠，让设置线程能够设置共享变量.try {Thread.sleep(500);} catch (InterruptedException e) {Thread.currentThread().interrupt();}}}).start();try {Thread.sleep(60 * 60 * 1000);} catch (InterruptedException e) {// 无需处理.}}
}