Sep 25, 2014 Also see Java support in Safari 12. Before you can enable Java with Mac, you may need to verify and download it first. If Java is not enabled by default after you download and install it on your Mac, it might need to be manually enabled. To do so, launch the Java Control Panel on your Mac (Apple menu System Preferences Java). Compiling and running a Java application on Mac OSX, or any major operating system, is very easy. Apple includes a fully-functional Java runtime and development environment out-of-the-box with OSX, so all you have to do is write a Java program and use the built-in tools to compile and run it. Drag Visual Studio Code.app to the Applications folder, making it available in the macOS Launchpad. Add VS Code to your Dock by right-clicking on the icon to bring up the context menu and choosing Options, Keep in Dock. Launching from the command line. You can also run VS Code from the terminal by typing 'code' after adding it to the path. Cross-play with Java Edition: Windows, Mac, and Linux Allows you to play with other Java edition players. Split screen multiplayer (online multiplayer requires subscription sold separately) Playing split screen allows up to four players to play on the screen at the same time. A MAC mechanism that is based on cryptographic hash functions is referred to as HMAC. HMAC can be used with any cryptographic hash function, e.g., SHA256 or SHA384, in combination with a secret shared key. HMAC is specified in RFC 2104. Every implementation of the Java platform is required to support the following standard Mac algorithms: HmacMD5.

Support for Java in Visual Studio Code is provided through a wide range of extensions. Combined with the power of core VS Code, these extensions give you a lightweight and performant code editor that also supports many of the most common Java development techniques.

This article will give you an overview of different capabilities of Visual Studio Code for Java developers. For a quick walkthrough of editing, running, and debugging a Java program with Visual Studio Code, use the button below.

Overview

VS Code provides essential language features such as code completion, refactoring, linting, formatting, and code snippets along with convenient debugging and unit test support. VS Code also integrates with tooling and frameworks such as Maven, Tomcat, Jetty, and Spring Boot. Leveraging the power of Visual Studio Code, Java developers get an excellent tool for both quick code editing and also the full debugging and testing cycle. It's a great choice for your Java work if you're looking for a tool which:

• Is fast, lightweight, free, and open source.
• Supports many other languages, not just Java.
• Helps start your Java journey without installing and learning a complex IDE.
• Provides great microservices support including popular frameworks, container tooling, and cloud integration.
• Offers team-based collaboration features such as Visual Studio Live Share.
• Improves your productivity through IntelliSense and other code-aware editing features.

Install Visual Studio Code for Java

VS Code is a fast editor and ships with great editing features. Before you begin, you must have the Java SE Development Kit (JDK) on your local environment. To run VS Code for Java, Java SE 11 or above version is required; for projects, VS Code for Java supports projects with version 1.5 or above. For more details, refer to Configure JDK.

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.

Install the Coding Pack for Java - macOS

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.

Alternatively, you can also add Java language support to VS Code by installing the popular Java extensions by yourself.

Download VS Code - If you haven't downloaded VS Code yet, quickly install for your platform (Windows, macOS, Linux).

To help set up Java on VS Code, there is a Java Extension Pack, which contains the most popular extensions for most Java developers:

There are also other popular Java extensions you can pick for your own needs, including:

Thanks to the great Java community around VS Code, the list doesn't end there. You can search for more Java extensions easily within VS Code:

1. Go to the Extensions view (⇧⌘X (Windows, Linux Ctrl+Shift+X)).
2. Filter the extensions list by typing 'java'.

This document describes some of the key features included in those Java extensions.

Getting started

NOTE: If you are using VS Code on Windows and want to take advantage of the Windows Subsystem for Linux, see Developing in WSL.

For developers new to Java or new to VS Code, we provide a Getting Started experience. Once you've installed the Java Extension Pack, you can open the Getting Started experience from within VS Code with the Java: Getting Started command from the Command Palette. Open the Command Palette (⇧⌘P (Windows, Linux Ctrl+Shift+P)) and type 'Java: Getting Started'.

Working with Java source files

You can use VS Code to read, write, run, and debug Java source file(s) without creating a project. VS Code for Java supports two modes, lightweight and standard. Lightweight mode is ideal for scenarios that only deal with source file(s). If you want to work with a full scale project, standard mode will be required. You can easily switch from lightweight mode to standard mode, when needed. To learn more, see Lightweight Mode.

Working with Java project

There are three things you must understand to work with Java in VS Code:

1. How does VS Code handle Workspaces?
2. How does VS Code handle Java?
3. How does VS Code handle Workspaces that contain Java?

VS Code Workspaces

In Visual Studio Code, a 'Workspace' means a collection of one or more filesystem folders (and their children) and all of the VS Code configurations that take effect when that 'Workspace' is open in VS Code. There are two kinds of 'Workspaces' in VS Code, 'folder workspaces' and 'multi-root workspaces'.

A 'folder workspace' is presented by VS Code when you open a filesystem folder (directory) in VS Code.

A 'multi-root workspace' can refer to multiple folders (directories) from disparate parts of the file system and VS Code displays the contents of the folder(s) of the workspace together in the File Explorer. To learn more, see Multi-root Workspaces.

Java project in VS Code

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In contrast to IDEs such as IntelliJ IDEA, NetBeans, or Eclipse, the concept of a 'Java project' is provided entirely by extensions, and is not a core concept in the base VS Code. When working with 'Java projects' in VS Code, you must have the necessary extensions installed to work with those project files.

For example, Maven, Eclipse, and Gradle Java projects are supported through Language Support for Java(TM) by Red Hat, by utilizing M2Eclipse, which provides Maven support, and Buildship, which provides Gradle support through the Eclipse JDT Language Server.

With Maven for Java, you can generate projects from Maven Archetypes, browse through all the Maven projects within your workspace, and execute Maven goals easily from an embedded explorer. Projects can also be created and managed with the Project Manager for Java extension.

Visual Studio Code also supports working with standalone Java files outside of a Java project, described in the Java Tutorial with VS Code.

VS Code Workspaces that contain Java project

Assuming the necessary Java extensions are installed, opening a VS Code workspace that contains Java artifacts will cause those extensions to understand those artifacts and present options for working with them.

More details about Java project support can be found in Java Project Management in Visual Studio Code and Build Tools.

Editing

Code Navigation

Java in Visual Studio Code also supports source code navigation features such as search for symbol, Peek Definition, and Go to Definition. The Spring Boot Tools extension provides enhanced navigation and code completion support for Spring Boot projects.

One of the key advantages of VS Code is speed. When you open your Java source file or folder, within a few seconds, with the help of Lightweight Mode, you will be able to navigate your code base with Outline view as well as commands such as Go to Definition and Go to Reference. This is especially useful when you open a project for the first time.

Code Completion

IntelliSense is a general term for language features, including intelligent code completion (in-context method and variable suggestions) across all your files and for built-in and third-party modules. VS Code supports code completion and IntelliSense for Java through Language Support for Java(TM) by Red Hat. It also provides AI-assisted IntelliSense called IntelliCode by putting what you're most likely to use at the top of your completion list.

See also in Java Code Navigation and Editing. VS Code also supports a range of Refactoring and Linting features.

Debugging

Debugger for Java is a lightweight Java Debugger based on Java Debug Server. It works with Language Support for Java by Red Hat to allow users to debug Java code within Visual Studio Code.

Starting a debugging session is easy, click on the Run|Debug button available at the CodeLens of your main() function, or press F5. The debugger will automatically generate the proper configuration for you.

Although it's lightweight, the Java debugger supports advanced features such as expression evaluation, conditional breakpoints, and hot code replacement. For more debugging related information, visit Java Debugging.

Testing

With the support from the Java Test Runner extension, you can easily run, debug, and manage your JUnit and TestNG test cases.

For more about testing, read Testing Java.

Spring Boot, Tomcat, and Jetty

To further improve your Java productivity in VS Code, there are extensions for most popular frameworks and tools such as Spring Boot, Tomcat, and Jetty created by the community.

The Tomcat extension includes an explorer to easily navigate and manage your Tomcat servers. You can create, start, debug, stop, and rename your Tomcat server with the extension.

See Application Servers to learn more about support for Tomcat and Jetty as well as other application servers with VS Code.

Spring Boot support is provided by Pivotal. There are also Spring Initializr Java Support and Spring Boot Dashboard extensions available from Microsoft to further improve your experience with Spring Boot in Visual Studio Code.

See Spring Boot with VS Code to learn more about Spring Boot support with VS Code.

Next steps

You may Sign up to follow the latest of Java on Visual Studio Code.

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Learn more about Java in VS Code

Read on to find out more about Visual Studio Code:

• Basic Editing - Learn about the powerful VS Code editor.
• Code Navigation - Move quickly through your source code.
• Tasks - use tasks to build your project and more
• Debugging - find out how to use the debugger with your project

• Class

Class Mac

• • javax.crypto.Mac

Java Code For Washing Machine

• All Implemented Interfaces:

  Cloneable

  
  
  This class provides the functionality of a 'Message Authentication Code' (MAC) algorithm.

  A MAC provides a way to check the integrity of information transmitted over or stored in an unreliable medium, based on a secret key. Typically, message authentication codes are used between two parties that share a secret key in order to validate information transmitted between these parties.

  A MAC mechanism that is based on cryptographic hash functions is referred to as HMAC. HMAC can be used with any cryptographic hash function, e.g., SHA256 or SHA384, in combination with a secret shared key. HMAC is specified in RFC 2104.

  Every implementation of the Java platform is required to support the following standard Mac algorithms:

  • HmacMD5
  • HmacSHA1
  • HmacSHA256

  These algorithms are described in the Mac section of the Java Cryptography Architecture Standard Algorithm Name Documentation. Consult the release documentation for your implementation to see if any other algorithms are supported.

  Since:

  1.4

• • Constructor Summary

    Constructors

    Modifier	Constructor and Description
    protected	Mac(MacSpi macSpi, Provider provider, String algorithm)

  • Method Summary

    Methods

    Modifier and Type	Method and Description
    Object	clone() Returns a clone if the provider implementation is cloneable.
    byte[]	doFinal()
    byte[]	doFinal(byte[] input) Processes the given array of bytes and finishes the MAC operation.
    void	doFinal(byte[] output, int outOffset)
    String	getAlgorithm() Returns the algorithm name of this Mac object.
    static Mac	getInstance(String algorithm) Returns a Mac object that implements the specified MAC algorithm.
    static Mac	getInstance(String algorithm, Provider provider) Returns a Mac object that implements the specified MAC algorithm.
    static Mac	getInstance(String algorithm, String provider) Returns a Mac object that implements the specified MAC algorithm.
    int	getMacLength()
    Provider	getProvider() Returns the provider of this Mac object.
    void	init(Key key)
    void	init(Key key, AlgorithmParameterSpec params) Initializes this Mac object with the given key and algorithm parameters.
    void	reset()
    void	update(byte input) Processes the given byte.
    void	update(byte[] input)
    void	update(byte[] input, int offset, int len) Processes the first len bytes in input, starting at offset inclusive.
    void	update(ByteBuffer input) Processes input.remaining() bytes in the ByteBuffer input, starting at input.position().

    • Methods inherited from class java.lang.Object

      equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

• • Constructor Detail

    • Mac

      Parameters:

      macSpi - the delegate

      provider - the provider

      algorithm - the algorithm

  • Method Detail

    • getAlgorithm

      Returns the algorithm name of this Mac object.

      This is the same name that was specified in one of the getInstance calls that created this Mac object.

      Returns:

      the algorithm name of this Mac object.

    • getInstance

      Returns a Mac object that implements the specified MAC algorithm.

      This method traverses the list of registered security Providers, starting with the most preferred Provider. A new Mac object encapsulating the MacSpi implementation from the first Provider that supports the specified algorithm is returned.

      Note that the list of registered providers may be retrieved via the Security.getProviders() method.

      Parameters:

      algorithm - the standard name of the requested MAC algorithm. See the Mac section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard algorithm names.

      Returns:

      the new Mac object.

      Throws:

      NoSuchAlgorithmException - if no Provider supports a MacSpi implementation for the specified algorithm.

      See Also:

      Provider

    • getInstance

      Returns a Mac object that implements the specified MAC algorithm.

      A new Mac object encapsulating the MacSpi implementation from the specified provider is returned. The specified provider must be registered in the security provider list.

      Note that the list of registered providers may be retrieved via the Security.getProviders() method.

      Parameters:

      algorithm - the standard name of the requested MAC algorithm. See the Mac section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard algorithm names.

      provider - the name of the provider.

      Returns:

      the new Mac object.

      Throws:

      NoSuchAlgorithmException - if a MacSpi implementation for the specified algorithm is not available from the specified provider.

      NoSuchProviderException - if the specified provider is not registered in the security provider list.

      IllegalArgumentException - if the provider is null or empty.

      See Also:

      Provider

    • getInstance

      Returns a Mac object that implements the specified MAC algorithm.

      A new Mac object encapsulating the MacSpi implementation from the specified Provider object is returned. Note that the specified Provider object does not have to be registered in the provider list.

      Parameters:

      algorithm - the standard name of the requested MAC algorithm. See the Mac section in the Java Cryptography Architecture Standard Algorithm Name Documentation for information about standard algorithm names.

      provider - the provider.

      Returns:

      the new Mac object.

      Throws:

      NoSuchAlgorithmException - if a MacSpi implementation for the specified algorithm is not available from the specified Provider object.

      IllegalArgumentException - if the provider is null.

      See Also:

      Provider

    • getProvider

      Returns:

      the provider of this Mac object.

    • getMacLength

      Returns the length of the MAC in bytes.

      Returns:

      the MAC length in bytes.

    • init

      Parameters:

      key - the key.

      Throws:

      InvalidKeyException - if the given key is inappropriate for initializing this MAC.

    • init

      Initializes this Mac object with the given key and algorithm parameters.

      Parameters:

      key - the key.

      params - the algorithm parameters.

      Throws:

      InvalidKeyException - if the given key is inappropriate for initializing this MAC.

      InvalidAlgorithmParameterException - if the given algorithm parameters are inappropriate for this MAC.

    • update

      Parameters:

      input - the input byte to be processed.

      Throws:

      IllegalStateException - if this Mac has not been initialized.

    • update

      Processes the given array of bytes.

      Parameters:

      input - the array of bytes to be processed.

      Throws:

      IllegalStateException - if this Mac has not been initialized.

    • update

      Processes the first len bytes in input, starting at offset inclusive.

      Parameters:

      input - the input buffer.

      offset - the offset in input where the input starts.

      len - the number of bytes to process.

      Throws:

      IllegalStateException - if this Mac has not been initialized.

    • update

      Processes input.remaining() bytes in the ByteBuffer input, starting at input.position(). Upon return, the buffer's position will be equal to its limit; its limit will not have changed.

      Parameters:

      input - the ByteBuffer

      Throws:

      IllegalStateException - if this Mac has not been initialized.

      Since:

      1.5

    • doFinal

      Finishes the MAC operation.

      A call to this method resets this Mac object to the state it was in when previously initialized via a call to init(Key) or init(Key, AlgorithmParameterSpec). That is, the object is reset and available to generate another MAC from the same key, if desired, via new calls to update and doFinal. (In order to reuse this Mac object with a different key, it must be reinitialized via a call to init(Key) or init(Key, AlgorithmParameterSpec).

      Returns:

      the MAC result.

      Throws:

      IllegalStateException - if this Mac has not been initialized.

    • doFinal

      Finishes the MAC operation.

      A call to this method resets this Mac object to the state it was in when previously initialized via a call to init(Key) or init(Key, AlgorithmParameterSpec). That is, the object is reset and available to generate another MAC from the same key, if desired, via new calls to update and doFinal. (In order to reuse this Mac object with a different key, it must be reinitialized via a call to init(Key) or init(Key, AlgorithmParameterSpec).

      The MAC result is stored in output, starting at outOffset inclusive.

      Parameters:

      output - the buffer where the MAC result is stored

      outOffset - the offset in output where the MAC is stored

      Throws:

      ShortBufferException - if the given output buffer is too small to hold the result

      IllegalStateException - if this Mac has not been initialized.

    • doFinal

      Processes the given array of bytes and finishes the MAC operation.

      A call to this method resets this Mac object to the state it was in when previously initialized via a call to init(Key) or init(Key, AlgorithmParameterSpec). That is, the object is reset and available to generate another MAC from the same key, if desired, via new calls to update and doFinal. (In order to reuse this Mac object with a different key, it must be reinitialized via a call to init(Key) or init(Key, AlgorithmParameterSpec).

      Parameters:

      input - data in bytes

      Returns:

      the MAC result.

      Throws:

      IllegalStateException - if this Mac has not been initialized.

    • reset

      Resets this Mac object.

      A call to this method resets this Mac object to the state it was in when previously initialized via a call to init(Key) or init(Key, AlgorithmParameterSpec). That is, the object is reset and available to generate another MAC from the same key, if desired, via new calls to update and doFinal. (In order to reuse this Mac object with a different key, it must be reinitialized via a call to init(Key) or init(Key, AlgorithmParameterSpec).

    • clone

      Returns a clone if the provider implementation is cloneable.

      Overrides:

      clone in class Object

      Returns:

      a clone if the provider implementation is cloneable.

      Throws:

      CloneNotSupportedException - if this is called on a delegate that does not support Cloneable.

      See Also:

      Cloneable

• Class

• Summary:
• Nested |
• Field |
• Constr |

• Detail:
• Field |
• Constr |

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