Quick Answer: What Are Packages Used For?

Package in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces.

Packages are used for: Preventing naming conflicts.

What is package and how is it used?

A package is a namespace that organizes a set of related classes and interfaces. Conceptually you can think of packages as being similar to different folders on your computer. You might keep HTML pages in one folder, images in another, and scripts or applications in yet another.

What is a Java package and how is it used?

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.

What is need of package?

Packages are containers for classes that are used to keep the class name space compartmentalized. The package is both a naming and a visibility control mechanism. We can define classes inside a package that are not accessed by the code outside that package.

What is user defined package in Java?

A java package is a group of similar types of classes, interfaces and sub-packages. Package in java can be categorized in two form, built-in package and user-defined package. Here, we will have the detailed learning of creating and using user-defined packages.

What is package example?

Package in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for: For example there can be two classes with name Employee in two packages, college.staff.cse.Employee and college.staff.ee.Employee.

What is a package give an example?

Give example of a context where you would need to breakdown your task into a number of packages. A Java package is a set of classes which are grouped together. Every class is part of some package. All classes in a file are part of the same package. Multiple files can specify the same package name.

Why do we use packages in Java?

Packages are used in Java in order to prevent naming conflicts, to control access, to make searching/locating and usage of classes, interfaces, enumerations and annotations easier, etc.

What are the benefits of packages in Java?

The advantages of using packages in Java:

  • Programmers can define their own packages to bundle a group of classes/interfaces, etc.
  • It is a good practice to group related classes implemented by you so that a programmer can easily determine that the classes, interfaces, enumerations, and annotations are related.

Can we import same package twice?

Will the JVM load the package twice at runtime? One can import the same package or same class multiple times. Neither compiler nor JVM complains about it. And the JVM will internally load the class only once no matter how many times you import the same class.

What class means?

A class is used in object-oriented programming to describe one or more objects. It serves as a template for creating, or instantiating, specific objects within a program. While each object is created from a single class, one class can be used to instantiate multiple objects.

Which is the predefined package?

Predefined packages are those which are developed by SUN micro systems and supplied as a.

What is inheritance explain?

In object-oriented programming, inheritance is the concept that when a class of objects is defined, any subclass that is defined can inherit the definitions of one or more general classes.

How many packages does Java have?

There are two packages are available in java predefined and user defined… There are many packages including the sub packages.

What is object in Java?

A Java object is a combination of data and procedures working on the available data. An object has a state and behavior. The state of an object is stored in fields (variables), while methods (functions) display the object’s behavior. Objects are created from templates known as classes.

What is Subpackage in Java?

Subpackage in java

Package inside the package is called the subpackage. It should be created to categorize the package further. Let’s take an example, Sun Microsystem has definded a package named java that contains many classes like System, String, Reader, Writer, Socket etc.

Which package is imported by default?

java.lang is the package available by default in the java platforms i.e. all the functions of the java.lang package can be used by default in any java program without the need to import the package for any particular class.

What is inheritance in Java with example?

Inheritance is a mechanism in which one class acquires the property of another class. For example, a child inherits the traits of his/her parents. With inheritance, we can reuse the fields and methods of the existing class. Hence, inheritance facilitates Reusability and is an important concept of OOPs.

What is AWT package in Java?

The java.awt package is the main package of the AWT, or Abstract Windowing Toolkit. It contains classes for graphics, including the Java 2D graphics capabilities introduced in the Java 2 platform, and also defines the basic graphical user interface (GUI) framework for Java.