What is a Packages?

In Java, packages are uses to avoid naming conflicts, limit access, and make searching/locating and using classes, interfaces, enumerations, and annotations easier, among other things.

In addition, A Package is a collection of linked types (classes, interfaces, enumerations, and annotations) that provides namespace management and access control.

On the other hand, A Java package is a logical grouping of related classes, interfaces, and sub-packages. Built-in packages and user-defined packages are the two types of packages in Java.

For instance, Java, lang, awt, javax, swing, net, io, util, sql, and other built-in packages are available.

Some of the Java packages that are currently available are:

java.lang – Contains all of the core courses.

java.io – This package includes classes for input and output functions.

Programmers can create their own packages to gather together classes, interfaces, and other items. Furthermore,It’s a good idea to group related classes that you’ve implementing so that a programmer can quickly see how the classes, interfaces, enumerations, and annotations are connect.

Advantages

1) Firstly, The Java package is uses to organize the classes and interfaces in order to make them easier to maintain.

2) Secondly,Access control is provided via the Java package.

3) Lastly, The Java package eliminates naming conflicts.

Creating a package

In addition, When building a package, give it a name and include a package statement at the head of every source file that contains the classes, interfaces, enumerations, and annotation types that you want to include in the package.

Most importantly, the first line of the source file should contain the package statement. Each source file can only have one package statement that applies to all types in the file.

The class, interfaces, enumerations, and annotation types will placed in the current default package if no package statement is specified.

You must use the -d option to compile Java programmes with package statements, as illustrated below.

javac -d Destination_folder file_name.java

Moreover, the compiled class files will then, stores in a folder with the supplied package name in the requested destination.

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