Monday, May 27, 2024
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Packages in Java

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Hello World! Today’s blog is about packages in java. Here, we will learn about what are packages and how we can use packages along with syntax and examples.

Definition For Packages In Java

Packages in java are collection of classes, interfaces (or) other packages. They are used for organizing java project. The primary purpose of using packages is to avoid naming conflicts and make it easier to manage code.

When we are creating a package, the name should be written in camelCase style.

To access the package from different packages, you need to use the “import” keyword:

Syntax For Importing Packages In Java

We can import packages from another packages in three different types:

Type 1: Importing A Certain Class Only

import java.util.Test; // if you want only certain class we can import like this.

Example for Type 1

import java.lang.Test;
class Test
{
public static void main (String args[])
{
System.out.println("Hello World")
}
}

Related Topics:

Check Array Formation Through Concatenation | Leetcode Problem 1640

Type 2: Accessing Any Class Within This Package

import java.lang.*; // In this type “*” means we can use any class from this package

Example for type 2

import java.lang.*;
class Mypack
{
public static void main (String args[])
{
System.out.println(“Hello World”);
}
}

Type 3: Directly Create Object Without Importing Any Package

Here we are not importing any kind of packages. We will write it directly when we are creating an object.

Example for type 3

class Test
{
public static void main ( String args[] )
{
java.lang.String Str = new java.lang.String("hello");
}
}

So that’s it for todays topic, we will reconnect with another interesting topic.

If there are any queries in this topic please let me know in the comments.

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