Introduction of packages and access modifier in Java

Morning Everybody

In this article today we are going to learn " Introduction of packages and access modifier in Java ". So let`s get started.

1) Packages:

A package is group of java classes, interfaces and sub packages. There are types of packages.

1) Built-in packages: 

Java provide many built in packages like java, lang, util, sql etc.

2) User Define packages:

User can create own package is call user define package.

2) Access Modifier: 

It defines the accessibility of data member (Variable) and member method (function). There are four types of access modifier in java are as follows:

1) Public: 

If we assign public access modifier to class members than it can access by any class.

2) Default:

If we assign don`t any access modifier to class members than it treated as default. It behaves like public access modifier in same package.

3) protected: 

If we assign protected access modifier to class members than it can access in same class and it`s child class and also use in other package with inheritance.

4) Private:

If we assign private access modifier to class members than it can access by same class public members only.

Thank you. Have a nice day.

" Be Student , Be Curious "

For more detail watch this video :