单态学习

package com.zhao.day2;

public class SingletoTest {
 public static void main(String[] args) {
  Singleton singleton = Singleton.getInstance();
  Singleton singleton2 = Singleton.getInstance();
  System.out.println(singleton == singleton2);
 }
}

class Singleton {
 private static Singleton singleton = new Singleton();
    private Singleton(){
  
 }
 public static Singleton getInstance(){
  return singleton;
  
 }
}