Qus:    What is singleton class? where is it used?
Aug 14, 2021 13:05 1 Answers Views: 367 VAMSI
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ROHAN Aug 16, 2021 06:32
Answer:   Singleton is a design pattern meant to provide one and only one instance of an object. Other objects can get a reference to this instance through a static method (class constructor is kept private) and I will tell you Why do we need one? Sometimes it is necessary, and often sufficient, to create a single instance of a given class. This has advantages in memory management, and for Java, in garbage collection. Moreover, restricting the number of instances may be necessary or desirable for technological or business reasons--for example, we may only want a single instance of a pool of database connections.

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