What is packages in Java?

In Java, a package is a namespace that organizes a set of related classes and interfaces. Conceptually, you can think of a package as a folder in a file system that holds various files (classes) related to a specific purpose or application. Using packages helps to avoid name conflicts and makes it easier to manage and maintain large software projects.

Java provides built-in packages such as java.lang, java.util, and java.io, among others. You can also create your own packages to further organize your code.

Here's an example of how to create and use a package in Java:

// File: MyClass.java package mypackage; // Declaring a package public class MyClass { public void display() { System.out.println("Hello from MyClass in mypackage!"); } } // File: TestClass.java import mypackage.MyClass; // Importing the package public class TestClass { public static void main(String[] args) { MyClass myClass = new MyClass(); myClass.display(); // Calling method from MyClass } }

Java packages Java programming class organization Java namespace custom packages

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