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Oct 4, 2024 · Packages in Java are a mechanism to encapsulate a group of classes, interfaces, and sub-packages. In Java, it is used for making search/locating and usage of classes, interfaces, enumerations, and annotations easier. It can be considered data encapsulation also. In other words, we can say a package is a container of a group of related classes where
- 13 min
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.
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. There are many built-in packages such as java, lang, awt, javax, swing, net, io, util, sql etc.
A package is a namespace that organizes a set of related classes and interfaces in Java. Learn how to use packages, access the Java Platform API, and find the complete listing of classes and methods.
- Introduction
- Overview of Java Packages
- Creating A Package
- Compiling with Javac
- Conclusion
In this quick tutorial, we’ll cover the basics of packages in Java. We’ll see how to create packages and access the types we place inside them. We’ll also discuss naming conventions and how that relates to the underlying directory structure. Finally, we’ll compile and run our packaged Java classes.
In Java, we use packages to group related classes, interfaces, and sub-packages. The main benefits of doing this are: 1. Making related types easier to find – packages usually contain types that are logically related 2. Avoiding naming conflicts – a package will help us to uniquely identify a class; for example, we could have a com.baeldung.Applica...
To create a package, we have to use the package statement by adding it as the very first line of code in a file. Let’s place a type in a package named com.baeldung.packages: It’s highly recommended to place each new type in a package. If we define types and don’t place them in a package, they will go in the defaultor unnamed package. Using default ...
When it’s time to compile our packaged classes, we need to remember our directory structure. Starting in the source folder, we need to tell javacwhere to find our files. We need to compile our TodoItem class first because our TodoListclass depends on it. Let’s start by opening a command line or terminal and navigating to our source directory. Now, ...
In this short article, we learned what a package is and why we should use them. We discussed naming conventions and how packages relate to the directory structure. We also saw how to create and use packages. Finally, we went over how to compile and run an application with packages using the javac and javacommands. The full example code is available...
- Amy Degregorio
May 30, 2024 · A package as the name suggests is a pack (group) of classes, interfaces and other packages. In java we use packages to organize our classes and interfaces. We have two types of packages in Java: built-in packages and the packages we can create (also known as user defined package).
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A package is a grouping of related types providing access protection and name space management. Learn how to create and use packages in Java with examples of classes, interfaces, and enumerations.
