package jvm;

/**
 * @Description
 * @Author msli
 * @Date 2021年09月01日
 */

public class VolatileTest {

 public static volatile int race = 0;

 public static void increase() {
 race++;
 }

 private static final int THREADS_COUNT = 20;

 public static void main(String[] args) {
 Thread[] threads = new Thread[THREADS_COUNT];
 for (int i = 0; i < threads.length; i++) {
 threads[i] = new Thread(new Runnable() {
 @Override
 public void run() {
 for (int j = 0; j < 10000; j++) {
 increase();
 }
 }
 });
 threads[i].start();
 }
 // 等待所有累加线程都结束
 while (Thread.activeCount() > 2) {
 System.out.println(Thread.activeCount());
 Thread.yield();
 }

 System.out.println(race);
 }
}