Singleton Class vs Static Class

Singleton Class	Static Class
·         They can be extended	·         Cannot
·         They can be passed around as an object	·         Cannot
·         They can Garbage collected	·         Cannot
·         They can override methods defined in Singleton class by extending it.	·         Cannot as it leads to inflexibility
·         Easy to create mock object for JUnits	·         Difficult to create mock objects and hard to test
·         They can be LAZY loaded if it’s a heavy object	·         Always early loaded
·	·         Better performance as static methods  are bonded at compile time
·         Use when need full  OO capability i.e. inheritance and polymorphism	·         Use when need to store bunch of static methods together