When a class is initialized in Java?

After class loading, initialization of class takes place by initializing all static members of class.

A Java class's static initialization usually happens immediately before the first time one of the following events occurs:

• an instance of the class is created,
• a static method of the class is invoked,
• a static field of the class is assigned,
• a non-constant static field is used, or
• for a top-level class, an assert statement lexically nested within the class is executed.

Reflection can also cause initialization of class. Some methods of java.lang.reflect package may cause class to be initialized.

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