Java Package
Java Package
Java Package:
In Java, a package is a way of organizing related classes and interfaces into a single namespace. Packages are used to avoid naming conflicts, improve modularity and maintainability, and provide access protection.
Java provides a number of predefined packages, such as java.lang, java.util, and java.io, which contain a large number of classes and interfaces that can be used in Java programs. In addition, you can create your own packages to organize your own classes and interfaces.
To create a package in Java, you can use the package keyword followed by the name of the package. For example, if you want to create a package named com.example, you can create a directory named com/example and put your class files inside it. Then, you can add the following statement at the beginning of your class files:
package com.example;
This statement indicates that the classes inside this file belong to the com.example package. You can use the package name to access the classes from other packages.
For example, if you have a class named MyClass inside the com.example package, and you want to use it in another class, you can use the following statement:
import com.example.MyClass;
This statement imports the MyClass from the com.examplepackage, and allows you to use it in your code.
Packages can also be used to control access to the classes and interfaces. You can use the public, protected, private, and default (no modifier) access modifiers to control the visibility of the classes and interfaces inside the package.
In summary, packages are used in Java to organize related classes and interfaces into a single namespace, avoid naming conflicts, and provide access protection. You can create your own packages by using the packagekeyword, and access the classes and interfaces from other packages using the import statement.