What is the Difference Between Package and Interface

The basic difference between packages and interfaces is that a package contains a group of classes and interfaces whereas, an interface contains methods and fields. ...

1. WHAT IS interface and package in Java?
2. What is meant by package?
3. Can packages have interfaces?
4. What is an example of an interface?
5. What is an interface for?
6. Can constructor be private?
7. What is package give an example?
8. What is package explain with example?
9. What class means?
10. How do we add class or interface to a package?
11. Is used to organize classes?
12. What does an interface contain?

WHAT IS interface and package in Java?

A package is a mechanism to group the similar type of classes, interfaces and sub-packages and provide access control. It organizes classes into single unit. In Java already many predefined packages are available, used while programming. For example: java.

What is meant by package?

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.

Can packages have interfaces?

Interfaces, like classes, can belong to a package by adding a package statement to the first line of the class file. Interfaces can also import other interfaces and classes from other packages, just as classes can.

What is an example of an interface?

An interface is a programming structure/syntax that allows the computer to enforce certain properties on an object (class). For example, say we have a car class and a scooter class and a truck class.

What is an interface for?

You use an interface to define a protocol of behavior that can be implemented by any class anywhere in the class hierarchy. Interfaces are useful for the following: Capturing similarities among unrelated classes without artificially forcing a class relationship.

Can constructor be private?

Yes, we can declare a constructor as private. If we declare a constructor as private we are not able to create an object of a class. We can use this private constructor in the Singleton Design Pattern.

What is package give an example?

A package means a complete version of an application software installed on your computer, phone etc.... For example, The MS Office package consists of Word, PowerPoint, Excel, Access, Publisher etc.... The Adobe package consists of photoshop, flash etc....

What is package explain with example?

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

What class means?

(Entry 1 of 2) 1a : a body of students meeting regularly to study the same subject Several students in the class are absent today. b : the period during which such a body meets. c : a course of instruction is doing well in her algebra class.

How do we add class or interface to a package?

To add a class or interface to a package:

1. Add package myPackageName ; as the first Java statement of the source file.
2. In your development directory, store the source file in a directory structure corresponding to your package name.

Is used to organize classes?

A package is a collection of classes and interfaces. Each package has its own name and organizes its top-level (that is, nonnested) classes and interfaces into a separate namespace, or name collection. ... But because many JVMs use directories to implement packages, this article equates packages with directories.

What does an interface contain?

Interfaces in Java

In the Java programming language, an interface is a reference type, similar to a class, that can contain only constants, method signatures, default methods, static methods, and nested types. Method bodies exist only for default methods and static methods.