package jvm;

/**
 * @Description
 * @Author msli
 * @Date 2021年09月06日
 */

public class DCLSingleton {

 private volatile static DCLSingleton instance;

 public static DCLSingleton getInstance() {
 if (instance == null) {
 synchronized (DCLSingleton.class) {
 if (instance == null) {
 instance = new DCLSingleton();
 }
 }
 }
 return instance;
 }

 public static void main(String[] args) {
 DCLSingleton.getInstance();
 }
}