为什么单例模式下程序多次启动对象hash值不变？

题主初步接触单例模式，在写了一个懒汉加载的单例模式demo之后，发现主方法运行多次时，创建的单例hash值一样，为什么重新启动程序单例的hash值还是一样呢

public class Singleton {

private static Singleton singleton = new Singleton();

public static Singleton getInstance(){
    return singleton;
}

public static void main(String[] args) {
    System.out.println(getInstance());
    System.out.println(LocalDateTime.now());
}

}

Singleton@74a14482
2022-06-15T23:18:22.014

Process finished with exit code 0

Singleton@74a14482
2022-06-15T23:18:46.888

Process finished with exit code 0