What is the purpose of the static keyword in Java?

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In Java, the static keyword is used to indicate that a member (variable, method, block, or nested class) belongs to the class itself, rather than to instances (objects) of the class. This means it can be accessed without creating an object of the class.

Purpose of static in Java:

1.Static Variables (Class Variables):

These are shared among all instances of a class. Only one copy exists, saving memory when many objects are created.

2.Static Methods:
Can be called directly using the class name without creating an object. Static methods cannot access non-static (instance) members directly.

3.Static Blocks:
Used for static initialization of a class. It runs once when the class is first loaded into memory.

4.Static Nested Classes:

A nested class declared static can be instantiated without an object of the outer class. Useful for grouping classes logically.

Why Use static?

• To share data or methods across all objects.

• To access utility or helper methods without creating objects (e.g., Math.sqrt()).

• To perform class-level operations like counters or configuration setups.

In summary, the static keyword in Java is used to define class-level members that are shared across all instances and accessible without object creation.

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