Difference Between Package and Interface in Java

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 package and interface in Java?
2. What is the difference between package and import in Java?
3. What is the difference between package and class in Java?
4. What is package in Java with example?
5. What is difference between package and interface?
6. Can constructor be private?
7. What is Java import?
8. How do imports work in Java?
9. What does import Java util * statement tells the compiler?
10. What is difference between class and interface?
11. What is meant by package?
12. Can package have interfaces in Java?

What is package and interface 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 the difference between package and import in Java?

Package is used to put all one Module related into one specified Folder for a better understanding ,whereas import is used to import the specific class that we need to run our application/class(Like we use Java. Util...etc). Here util is java predefined package and Scanner is the class present in util package.

What is the difference between package and class in Java?

A class is a declaration (and often implementation) which encapsulates the members properties and methods which instances of that type will posses. ... A package is simply a namespace under which you can categorize classes, analogous to a "folder" or "path", so you can group classes with related purpose or functionality.

What is package in Java with example?

A package in Java is used to group related classes. Think of it as a folder in a file directory. We use packages to avoid name conflicts, and to write a better maintainable code. ... Built-in Packages (packages from the Java API) User-defined Packages (create your own packages)

What is 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. ...

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 Java import?

import is a Java keyword. It declares a Java class to use in the code below the import statement. Once a Java class is declared, then the class name can be used in the code without specifying the package the class belongs to. ... import static java. lang.

How do imports work in Java?

To import java package into a class, we need to use java import keyword which is used to access package and its classes into the java program. Use import to access built-in and user-defined packages into your java source file so that your class can refer to a class that is in another package by directly using its name.

What does import Java util * statement tells the compiler?

For example, to import the Scanner class from the java. util package, you use "import java. ... The import statement tells the compiler where to locate the classes.

What is difference between class and interface?

A class describes the attributes and behaviors of an object. An interface contains behaviors that a class implements. A class may contain abstract methods, concrete methods. An interface contains only abstract methods.

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 package have interfaces in Java?

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.