Java Implementation Singleton mode

2015-09-19

1  Public classprivatetest2{//single-case mode3      Public Static voidMain (String args[])4     {5Singleton singleton1=singleton.getinstance ();6Singleton singleton2=singleton.getinstance ();7System.out.println (singleton1==singleton2);8     }9 }Ten classSingleton One { A     PrivateSingleton () {}; -      Public StaticSingleton getinstance ()//a static method or variable, like an interface variable, is a direct class name (or interface name). Method name (or variable name) -{//In addition, static methods can only access static variables, stating that it is convenient to invoke the static method directly the         //if (singleton = = NULL) -         //singleton=new Singleton ();//This method requires simultaneous processing in multithreading -         returnSingleton; -     } +     //attribute Area -     Private StaticSingleton singleton=NewSingleton ();//static variables, which are executed 1 times in all objects, similar to global variables +}

It is very useful in multi-threading.

Java Implementation Singleton mode