Implementation of the Singleton pattern--deferred initialization The placeholder class replaces the double-check lock for deferred initialization and thread safety purposes.

Package Org.test;public class Singleton {public static void main (string[] args) {//TODO auto-generated method Stubsinglet On Singleton=singleton.getinstance (); System.out.println (singleton);} Deferred initialization of the placeholder class overrides the double-check lock for deferred initialization and thread safety purposes. private static class Singletonholder{public static Singleton singleton=new Singleton ();} public static Singleton getinstance () {return Singletonholder.singleton;} Private String name= "test";p rivate Singleton () {}public String toString () {return name;}}

Implementation of the Singleton pattern--deferred initialization The placeholder class replaces the double-check lock for deferred initialization and thread safety purposes.