Keyword,Return type,Method,Objects,Void&Variables...

Keywords:

Static :

• static keyword refers to class specific information.

• Static keyword have only one memory copy.

• In the static keyword class can common for all object.

Non-static:

• Non-Static Keyword refers to object specific information.

• Non static have multiple memory copy.

• In the non static keyword object have the specific information.

Return Type:

• The return statement is used to exit from a method and optionally pass a value back to the code that called the method.

• Return statement is the last statement in the method definition.

• If the method has a return type (like int, String, boolean, etc.), return sends a value of that type back.

• If the method is declared as void, return; simply ends the method early (and doesn’t return any value).

Example:

String buy() { System.out.println("buy method"); return "thank you" } 

Method:

A method in Java is a block of code that performs a specific task. It is used to define behavior or functionality that can be reused.

Example:

String buy() { System.out.println("buy method"); } 

Object:

In Java, an object is an instance of a class. It represents a real-world entity with state (data) and behavior (methods).

## Key concepts:

• Class: A blueprint or template.
• Object: A real thing created from the blueprint.

syntax for object:

Home Person = new Home(); 

• Home - Home is the name of the class.

• Person - Person is the name of the variable.

• new Home - new Home is the keyword used to create new object from the class.

Void:

This method does not return anything.

It is used when a method performs an action, but doesn’t give back a result.

Variables:

Local Variables:

Local variable declared in side the function or block.

Global variables:

Global variable declared outside the function.