Access modifiers are used to control access for variables, methods, and sometimes inner classes.
There are 4 access modifiers available:
public
— accessible from everywhere. If we mark it as public it will be accessible from everywhere.
protected
— accessible within the same package and child classes.
default
— if we don't put anything it’s the default access modifier. It’s accessible within the same package only.
private
— accessible within the same class only.
Let’s take a look at the examples with methods:
Main
andPractice
are in the same package.- We can use
public, protected, and default
methods inPractice
class, but we have compiler error for ourprivate
method. Because it is accessible within the same class only.
The access modifiers are needed to encapsulate our code and are used with one of the OOP concepts — encapsulation.
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Welcome to Java Programming Language
Variables and Primitives in Java
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Methods with Java
Java Math Operators and special operators
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Access modifiers in Java
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OOP: Encapsulation in Java
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