SingleTon in Java
Singleton is a design pattern that ensures that a class can only have one object . Define a class that has only one instance and provides a global point of access to it . Static member: It gets memory only once because of static, it contains the instance of the Singleton class. Private constructor: It will prevent instantiating the Singleton class from outside the class. Static factory method: This provides the global point of access to the Singleton object and returns the instance to the caller. Its used in Logging, Caching, thread pools, configuration settings etc.. Advantages: Saves memory because the object is not created at each request. An only a single instance is reused again and again. Thread Safe class Playground { public static void main ( String [ ] args ) { SingleTon singleTonClass = SingleTon . getInstance (); System . out . println ( "Hello Java" ); } } class Singl...