public class Singleton { public static Singleton singleton = new Singleton();      public static int a;      public static int b = 0;     private Singleton() {           super();           a++;           b++;       }      public static Singleton GetInstence() {           return singleton;       }          public static void main(String[] args) {           Singleton mysingleton = Singleton.GetInstence();           System.out.println(mysingleton.a);           System.out.println(mysingleton.b);       }  }