What is the difference between package and class in java

Change Language. Related Articles. Basics of Java. Operators in Java. Packages in Java. Flow Control in Java. Loops in Java. Jump Statements in Java. Arrays in Java. Strings in Java. OOPS in Java. Constructors in Java. Interfaces in Java. Keywords in Java. Exception Handling in Java.

Collection Framework. Multi-threading in Java. Table of Contents. Save Article. Improve Article. Like Article. Vector is imported, hence we are. The following example will import ALL the classes in the java.

To create your own package, you need to understand that Java uses a file system directory to store them. Just like folders on your computer:. The -d keyword specifies the destination for where to save the class file. Note: The package name should be written in lower case to avoid conflict with class names. We just launched W3Schools videos. Get certified by completing a course today! If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:.

Syntax import package. What is Interface in Java 4. Java provides a large number of classes. Keeping all the classes in a single folder can be difficult because it is hard to access. This can affect the program manageability. Java uses packages to arrange classes. It is similar to a folder. Java API groups classes into different packages according to the functionality.

Therefore, each package contains a related set of classes. Few example packages are as follows. The java. Those are few Java API packages. When the programmer wants to use a certain class in the program, he should import that package.

If the programmer wants to use the BufferInputStream class in the java. According to the above example, the employee is the package name. The Employee class is a part of the employee package. This file saves as Employee. Furthermore, it is possible to import a public class from one package to another. Refer the following example. Class A is in package 1, and it contains the public method called display.

Class B is in package 2, and it contains the main method. A component runs within a context called a container. Container: A component runs within a context called a container. How the services will be provided and accessed is determined by a contract, which is an agreement between the Web application and the container. This provides a considerable amount of security in the Java EE framework because the client applications are unaware of the existence of the container and therefore it cannot be accessed directly.

Thus, the Web container is responsible for initializing Web application components and invoking client requests on the components. Framework: Frameworks impose a definite structure on the code that uses them, whereas libraries do not.

In software, framework is set of reusable software program that forms the basis for an application. Frameworks helps the programmers to build the application quickly.