Question

how do we tell java that we want to use a particular package in a file​

Answer 1

Answer:

A Package is a collection of related classes. It helps organize your classes into a folder structure and make it easy to locate and use them. More importantly, it helps improve re-usability. Each package in Java has its unique name and organizes its classes and interfaces into a separate namespace, or name group.

Answer 2

By using the "import" keyword we used the package in the java programming language.

Explanation:

• The package is the collection of functions and the class in the java programming language. The main advantage of the package provides the reusability feature in the programming language.
• In the predefined Package, the meaning of function and class is already defined only we used that package and uses that function in a very simple manner For example the Scanner class is defined in the java. util package.
• However, we also create there own package The advantage of creating there own package has used this package in multiple programs if required .to create any package used the syntax package package_name;
• we used the import keyword for using any package in java.

      For example :

                 import java.util.*;

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