Singleton design pattern is used to create only one instance.I want to a an example when we are using this singleton design pattern in real life.generally the dao classes like insertDao,updateDao,dele...
Singleton Design Pattern is used when we would like to have a single instance. A class distributes the only instance of itself. It will be used with Connection Pool usually.
As there is no predefined method in Java. We can use an indirect approach. We can calculate the memory of an object by taking the difference of the amount of memory used by the program before creatin...