Java Algorithm interview questions: Write a Singleton, javasingleton

Java Algorithm interview questions: Write a Singleton, javasingleton

Package com. swift; public class Singleton {public static void main (String [] args) {/** write a Singleton */ORC_Hungry.getOrc (). fun (); ORC_Lazy.getOrc (). fun () ;}} class ORC_Hungry {// hungry Chinese private static ORC_Hungry orc = new ORC_Hungry (); private ORC_Hungry () {} public static ORC_Hungry getOrc () {return orc ;} public void fun () {System. out. println ("This is a hungry Singleton ..... ") ;}} class ORC_Lazy {// lazy private static ORC_Lazy orc; private ORC_Lazy () {} public static synchronized ORC_Lazy getOrc () {if (orc = null) {orc = new ORC_Lazy ();} return orc;} public void fun () {System. out. println ("This is a lazy Singleton ..... ");}}