Visual studio java extension

Getting Started with Java in VS Code

This tutorial shows you how to write and run Hello World program in Java with Visual Studio Code. It also covers a few advanced features, which you can explore by reading other documents in this section.

For an overview of the features available for Java in VS Code, see Java Language Overview.

If you run into any issues when following this tutorial, you can contact us by entering an issue.

Setting up VS Code for Java development

Coding Pack for Java

To help you set up quickly, you can install the Coding Pack for Java, which includes VS Code, the Java Development Kit (JDK), and essential Java extensions. The Coding Pack can be used as a clean installation, or to update or repair an existing development environment.

Note: The Coding Pack for Java is only available for Windows and macOS. For other operating systems, you will need to manually install a JDK, VS Code, and Java extensions.

Installing extensions

If you are an existing VS Code user, you can also add Java support by installing the Extension Pack for Java, which includes these extensions:

The Extension Pack for Java provides a Quick Start guide and tips for code editing and debugging. It also has a FAQ that answers some frequently asked questions. Use the command Java: Tips for Beginners from the Command Palette ( ⇧⌘P (Windows, Linux Ctrl+Shift+P ) ) to launch the guide.

You can also install extensions separately. The Extensions Guide is provided to help you. You can launch the guide with the Java: Extensions Guide command.

For this tutorial, the only required extensions are:

Installing and setting up a Java Development Kit (JDK)

To use Java within Visual Studio Code, you need to install a Java Development Kit (JDK) on your local environment. JDK is a software development environment used for developing Java applications.

Supported Java versions

The Extension Pack for Java supports Java version 1.5 or above.

Note: To configure JDKs for your projects, see Configure Runtime for Projects. To enable Java preview features, see How can I use VS Code with new Java versions.

Installing a Java Development Kit (JDK)

If you have never installed a JDK before and need to install one, we recommend you to choose from one of these sources:

Creating a source code file

Create a folder for your Java program and open the folder with VS Code. Then in VS Code, create a new file and save it with the name Hello.java . When you open that file, the Java Language Server automatically starts loading, and you should see a language status item with a loading icon on the right side of the Status Bar showing the language status is busy. After it finishes loading, you can hover on the language status item and find the loading process has been finished successfully. You can also choose to pin the status item in the status bar.

Note: If you open a Java file in VS Code without opening its folder, the Java Language Server might not work properly.

VS Code will also try to figure out the correct package for the new type and fill the new file from a template. See Create new file.

You can also create a Java project using the Java: Create Java Project command. Bring up the Command Palette ( ⇧⌘P (Windows, Linux Ctrl+Shift+P ) ) and then type java to search for this command. After selecting the command, you will be prompted for the location and name of the project. You can also choose your build tool from this command.

Visual Studio Code also supports more complex Java projects — see Project Management.

Editing source code

You can use code snippets to scaffold your classes and methods. VS Code also provides IntelliSense for code completion, and various refactor methods.

To learn more about editing Java, see Java Editing.

Running and debugging your program

To run and debug Java code, set a breakpoint, then either press F5 on your keyboard or use the Run > Start Debugging menu item. You can also use the Run|Debug CodeLens option in the editor. After the code compiles, you can see all your variables and threads in the Run and Debug view.

The debugger also supports advanced features such as Hot Code Replace and conditional breakpoints.

More features

The editor also has many more capabilities to assist with your Java workload.

• Editing Java explains how to navigate and edit Java in more details
• Debugging illustrates all the key features of the Java Debugger
• Testing provides comprehensive support for JUnit and TestNG framework
• Java Project Management shows you how to use a project view and work with Maven
• Spring Boot and Tomcat and Jetty demonstrate great framework support
• Java Web Apps shows how to work with Java Web App in VS Code

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Java-Extension

Java-extension is a VS Code extension that simplifies Java programming. Select your preferred compiler, compile, and run with one Click.This VScode extension will saves your time and enhances your productivity.

Java-Extension

Java-Extension is a VS Code extension that simplifies Java programming. It provides code snippets, compiler integration, and an enhanced development experience.

Prerequisites

Before using this extension, you need to install the Java compiler. You can download the Java Development Kit (JDK) from the official Oracle website: Java SE Downloads

Features

• Code snippets for common Java patterns
• Integration with the Java compiler
• Saves time and enhances productivity

Installation

1. Launch Visual Studio Code.
2. Go to the Extensions view (Ctrl+Shift+X).
3. Search for «Java-Extension».
4. Click on the «Install» button.

Usage

1. Open a Java file in Visual Studio Code.
2. Use the provided code snippets to insert common Java patterns.
3. Click the «Run» button or use the java-extension.brj command to compile and run your Java code.

Snippets

The extension provides the following code snippets:

• !jmain : Java template for a class with a main method.
• !jif : Java template for an if-else if-else statement.
• !jswitch : Java template for a switch statement.
• !jwhile : Java template for a while loop.
• !jdowhile : Java template for a do-while loop.
• !jfor : Java template for a for loop.
• !jmethod : Java template for a method.
• !jinterface : Java template for an interface.
• !jclass : Java template for a class.

Contributing

Contributions are welcome! If you encounter any issues or have suggestions for improvement, please report them in the issue tracker.

License

This extension is licensed under the MIT License.

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Extension Pack for Java

Extension Pack for Java is a collection of popular extensions that can help write, test and debug Java applications in Visual Studio Code. Check out Java in VS Code to get started.

Extensions Included

• 📦 Language Support for Java™ by Red Hat
  • Code Navigation
  • Auto Completion
  • Refactoring
  • Code Snippets
  • Debugging
  • Run & Debug JUnit/TestNG Test Cases
  • Project Scaffolding
  • Custom Goals
  • Manage Java projects, referenced libraries, resource files, packages, classes, and class members
  • AI-assisted development
  • Completion list ranked by AI

  Other Recommendations

  You can do more with VS Code. Here are some more recommendations that could help.

  Spring

  Spring Tools 4 (ST4) is also available in Visual Studio Code. It understands Spring so you can navigate Spring code at the level of beans, routes, etc. It can also show live information of the running Spring Boot applications. Check out the ST4 website to see a complete list of its features.

  To use ST4, install 📦 Spring Boot Extension Pack. Please also check out the User Guide to make the most of it.

  Eclipse MicroProfile

  The 📦 Extension Pack for MicroProfile is a collection of extensions that can help develop your Java microservices using Eclipse MicroProfile. You can quickly generate a MicroProfile project and utilize development tools for runtimes such as Open Liberty and Quarkus.

  Quarkus

  📦 Quarkus Tools for Visual Studio Code is a feature-packed extension tailored for Quarkus application development within Visual Studio Code. You can quickly get started by using the extension’s project generation and project debugging feature. The extension also provides amazing language features (completion, hover, validation etc.) for your project’s application.properties file.

  Containers and Microservices

  You can use 📦 Docker extension to build docker images and work with image registries.

  📦 Kubernetes extension provides an explorer view to manage clusters and the nodes inside. It also provides advanced syntax support for editing Kubernetes manifest files.

  Tomcat and Jetty

  Both 📦 Tomcat and 📦 Jetty extension are available. They provide dedicated views to help work with your favorite web servers.

  Linting

  The 📦 SonarLint extension lets you detect bugs and vulnerabilities as you write code in VS Code. The extension will simply run in the background and highlight code that poses a quality or security concern.

  At the same time, 📦 CheckStyle is also available.

  Questions & Issues

  Each extension mentioned above is a separate open-source project and has its own repository. To make things easier, simply 🙋 open an issue in this repository. The new issue will be triaged and redirected.

  Telemetry

  This extension collects telemetry data to help us build a better experience for building Java applications with VS Code. We only collect data on which commands are executed. We do not collect any information about names, addresses, paths, etc. The extension respects the telemetry.enableTelemetry setting which you can learn more about in our FAQ.

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