图解设计模式-Singleton模式

public class Singleton {

    private static final Singleton singleton = new Singleton();

    private Singleton() {
        System.out.println("初始化");
    }

    public static Singleton getSingleton() {
        System.out.println("获得单例");
        return singleton;
    }
}

public class Main {
    public static void main(String[] args) {
        Singleton singleton = Singleton.getSingleton();

    }
}