Java Archive Downloads - Java SE 13 - Oracle
Java SE Development Kit (JDK) 13.0.2 12.0.2 11.0.5 10.0 9.0.4 Free Download
If you are a Java developer or enthusiast, you might be interested in downloading the latest version of Java SE Development Kit (JDK) for free. JDK is a software package that provides you with everything you need to create, compile, run, debug, and test Java applications and applets on various platforms.
Java SE Development Kit (JDK) 13.0.2 12.0.2 11.0.5 10.0 9.0.4 Free Download
In this article, we will explain what JDK is, how to download it for free, how to use it to develop Java applications, and how to update it to the latest version.
What is Java SE Development Kit (JDK)?
JDK stands for Java SE Development Kit, where SE stands for Standard Edition. It is a software development environment that enables you to create applications and applets using the Java programming language.
The components of JDK
JDK consists of several components, such as:
Java Runtime Environment (JRE): This is the core component of JDK that provides the Java virtual machine (JVM), the libraries, and the components that are required to run Java applications and applets.
Java Compiler: This is a tool that converts your source code into bytecode that can be executed by the JVM.
Java Debugger: This is a tool that helps you find and fix errors in your Java code.
Java Documentation Generator: This is a tool that generates HTML documentation from your Java code comments.
Java Archive (JAR) Tool: This is a tool that creates and manages compressed files that contain your Java classes and resources.
Java Launcher: This is a tool that launches your Java applications and applets from the command line or a graphical user interface.
Other tools and utilities: These are additional tools and utilities that help you with various tasks, such as testing, profiling, monitoring, security, internationalization, and deployment of your Java applications and applets.
The benefits of using JDK
Some of the benefits of using JDK are:
It is free: You can download and use JDK for free for personal use and development use under the Oracle Technology Network License Agreement for Oracle Java SE.
It is cross-platform: You can use JDK on various operating systems, such as Windows, Linux, macOS, Solaris, etc.
It is compatible: You can use JDK to develop applications and applets that are compatible with different versions of Java SE and other Java platforms, such as Java EE and Java ME.
It is comprehensive: You can use JDK to develop applications and applets that use various features and functionalities of the Java programming language and platform, such as object-oriented programming, concurrency, generics, lambda expressions, streams, modules, annotations, reflection, networking, security , graphics, database, web, etc.
It is updated: You can use JDK to develop applications and applets that use the latest features and enhancements of the Java programming language and platform, such as records, text blocks, switch expressions, pattern matching, sealed classes, etc.
How to download JDK for free?
If you want to download JDK for free, you need to follow these steps:
The system requirements for JDK
Before you download JDK, you need to make sure that your system meets the minimum requirements for JDK. These are:
Operating system: You need to have a supported operating system, such as Windows 10, Windows 8.1, Windows 7 SP1, Linux x64, macOS x64, Solaris SPARC x64, etc.
Processor: You need to have a processor that supports the 64-bit instruction set.
Memory: You need to have at least 2 GB of RAM for Windows and Linux, and at least 4 GB of RAM for macOS and Solaris.
Disk space: You need to have at least 250 MB of free disk space for Windows and Linux, and at least 300 MB of free disk space for macOS and Solaris.
Internet connection: You need to have a stable internet connection to download JDK from the official website.
The steps to download and install JDK
After you verify that your system meets the requirements for JDK, you can proceed to download and install JDK by following these steps:
Go to the official website of Oracle Java SE: You can visit this link https://www.oracle.com/java/technologies/javase-downloads.html to access the official website of Oracle Java SE.
Select the version of JDK that you want to download: You can choose from various versions of JDK that are available on the website, such as JDK 13.0.2, JDK 12.0.2, JDK 11.0.5, JDK 10.0.2, JDK 9.0.4, etc. You can also select the operating system that you are using from the drop-down menu.
Accept the license agreement and click on the download link: You need to accept the Oracle Technology Network License Agreement for Oracle Java SE before you can download JDK. You can read the terms and conditions of the license agreement here. After you accept the license agreement, you can click on the download link that corresponds to your operating system and version of JDK.
Save the file and run the installer: You need to save the file that you have downloaded in a location that you can access easily. The file name will have the format jdk-version_os-platform_bin.exe for Windows, jdk-version_os-platform_bin.tar.gz for Linux and Solaris, and jdk-version_os-platform_bin.dmg for macOS. After you save the file, you need to run the installer by double-clicking on it or using the command line.
Follow the instructions on the screen: You need to follow the instructions on the screen to complete the installation process of JDK. You can choose the default settings or customize them according to your preferences. You will also need to agree to some additional terms and conditions during the installation process.
Verify the installation of JDK: After you finish the installation process of JDK, you need to verify that it has been installed correctly on your system. You can do this by opening a command prompt or a terminal window and typing java -version. You should see a message that displays the version of Java that you have installed.
The license agreement for JDK
As mentioned earlier, you need to accept the Oracle Technology Network License Agreement for Oracle Java SE before you can download and use JDK for free. This license agreement grants you a non-exclusive, non-transferable, limited license to use JDK for personal use and development use only. You are not allowed to use JDK for any commercial or production purposes without obtaining a separate license from Oracle or its affiliates.
You also need to comply with all applicable laws and regulations when using JDK. You are not allowed to modify, decompile, reverse engineer, or distribute JDK without prior written consent from Oracle or its affiliates. You are also responsible for any damages or liabilities that may arise from your use of JDK.
How to use JDK to develop Java applications?
After you download and install JDK, you can use it to develop Java applications and applets on your system. Here are some of the ways you can use JDK to develop Java applications:
The tools and commands in JDK
JDK provides you with various tools and commands that help you with different aspects of Java development, such as:
javac: This is the Java compiler that converts your source code into bytecode that can be executed by the JVM.
java: This is the Java launcher that launches your Java applications and applets from the command line or a graphical user interface.
jar: This is the Java archive tool that creates and manages compressed files that contain your Java classes and resources.
javadoc: This is the Java documentation generator that generates HTML documentation from your Java code comments.
jdb: This is the Java debugger that helps you find and fix errors in your Java code.
jshell: This is the Java shell tool that allows you to execute Java expressions and statements interactively from the command line.
jlink: This is the Java linker tool that creates custom runtime images that contain only the modules and dependencies that your application requires.
jmod: This is the Java module tool that creates and manipulates modular JAR files.
jpackage: This is the Java packaging tool that creates native installers and launchers for your Java applications.
jps: This is the Java process status tool that displays information about the Java processes running on your system.
jstat: This is the Java statistics tool that monitors the performance and resource consumption of the JVM.
jvisualvm: This is the Java visual VM tool that provides a graphical user interface for monitoring and analyzing the JVM and Java applications.
Other tools and utilities: These are additional tools and utilities that help you with various tasks, such as testing, profiling, monitoring, security, internationalization, and deployment of your Java applications and applets.
The examples of using JDK
To give you a better idea of how to use JDK to develop Java applications, here are some examples of using JDK:
- Example 1: Creating a simple Hello World application using JDK
To create a simple Hello World application using JDK, you need to follow these steps:
Create a source file named HelloWorld.java: You need to create a source file that contains the following code:
public class HelloWorld public static void main(String[] args) System.out.println("Hello World!");
Compile the source file using javac: You need to compile the source file using the javac command. You can do this by opening a command prompt or a terminal window and typing: javac HelloWorld.java
This will create a bytecode file named HelloWorld.class in the same directory as the source file.
Run the application using java: You need to run the application using the java command. You can do this by typing: java HelloWorld
This will launch the application and display the message "Hello World!" on the screen.
- Example 2: Creating a JAR file using JDK
To create a JAR file using JDK, you need to follow these steps:
Create a source file named Greeting.java: You need to create a source file that contains the following code:
public class Greeting public static void sayHello(String name) System.out.println("Hello " + name + "!");
Compile the source file using javac: You need to compile the source file using the javac command. You can do this by typing: javac Greeting.java
This will create a bytecode file named Greeting.class in the same directory as the source file.
Create a manifest file named MANIFEST.MF: You need to create a manifest file that contains information about the JAR file, such as its name, version, main class, etc. You can do this by creating a text file named MANIFEST.MF in the same directory as the source file and typing: Manifest-Version: 1.0 Created-By: 13.0.2 (Oracle Corporation) Main-Class: Greeting
This will specify that the JAR file is created by JDK 13.0.2, and that the main class of the JAR file is Greeting.
Create a JAR file using jar: You need to create a JAR file using the jar command. You can do this by typing: jar cvfm Greeting.jar MANIFEST.MF Greeting.class
This will create a JAR file named Greeting.jar that contains the manifest file and the bytecode file.
Run the JAR file using java: You need to run the JAR file using the java command. You can do this by typing: java -jar Greeting.jar
This will launch the JAR file and display the message "Hello null!" on the screen. You can also pass an argument to the JAR file to specify a name, such as: java -jar Greeting.jar John
This will display the message "Hello John!" on the screen.
The best practices and tips for using JDK
To make the most of JDK, you should follow some of the best practices and tips for using JDK, such as:
Use an integrated development environment (IDE): While you can use JDK from the command line or a text editor, you can also use an IDE that provides you with a graphical user interface and various features that make Java development easier and faster, such as code completion, syntax highlighting, debugging, testing, refactoring, etc. Some of the popular IDEs for Java development are Eclipse, NetBeans, IntelliJ IDEA, etc.
Use a build tool: While you can use JDK to compile and run your Java applications and applets, you can also use a build tool that automates and simplifies the process of building, testing, and deploying your Java applications and applets. Some of the popular build tools for Java development are Maven, Gradle, Ant, etc.
Use a version control system: While you can use JDK to manage your source files and bytecode files, you can also use a version control system that helps you track and manage the changes in your code over time. This allows you to collaborate with other developers, revert to previous versions, branch and merge your code, etc. Some of the popular version control systems for Java development are Git, SVN, Mercurial, etc.
Use a testing framework: While you can use JDK to test your Java applications and applets, you can also use a testing framework that provides you with various tools and methods to write and run automated tests for your code. This helps you ensure the quality and functionality of your code, find and fix bugs, prevent regressions, etc. Some of the popular testing frameworks for Java development are JUnit, TestNG, Spock, etc.
Use a code analysis tool: While you can use JDK to analyze your Java applications and applets, you can also use a code analysis tool that provides you with various metrics and reports to measure and improve the quality and performance of your code. This helps you identify and resolve issues such as code smells, bugs, vulnerabilities, complexity, duplication, etc. Some of the popular code analysis tools for Java development are SonarQube, PMD, Checkstyle, etc.
Use a documentation tool: While you can use JDK to generate documentation for your Java applications and applets, you can also use a documentation tool that provides you with various features and formats to create and publish comprehensive and user-friendly documentation for your code. This helps you communicate and document your code design, functionality, usage, etc. Some of the popular documentation tools for Java development are Asciidoctor , Javadoc, Sphinx, etc.
How to update JDK to the latest version?
If you want to update JDK to the latest version, you need to follow these steps:
The security baselines and critical patch updates for JDK
Before you update JDK, you need to be aware of the security baselines and critical patch updates for JDK. These are:
Security baselines: These are the minimum recommended versions of JDK that contain the latest security fixes and enhancements. You should always use the security baseline version or higher for your JDK installation. You can check the security baseline versions for different versions of JDK here.
Critical patch updates: These are the quarterly updates that provide security fixes and enhancements for JDK. You should always apply the latest critical patch update for your JDK installation. You can check the critical patch updates for different versions of JDK here.
The steps to update JDK
After you check the security baselines and critical patch updates for JDK, you can proceed to update JDK by following these steps:
Go to the official website of Oracle Java SE: You can visit this link https://www.oracle.com/java/technologies/javase-downloads.html to access the official website of Oracle Java SE.
Select the version of JDK that you want to update: You can choose from various versions of JDK that are available on the website, such as JDK 13.0.2, JDK 12.0.2, JDK 11.0.5, JDK 10.0.2, JDK 9.0.4, etc. You can also select the operating system that you are using from the drop-down menu.
Accept the license agreement and click on the download link: You need to accept the Oracle Technology Network License Agreement for Oracle Java SE before you can download JDK. You can read the terms and conditions of the license agreement here. After you accept the license agreement, you can click on the download link that corresponds to your operating system and version of JDK.
Save the file and run the installer: You need to save the file that you have downloaded in a location that you can access easily. The file name will have the format jdk-version_os-platform_bin.exe for Windows, jdk-version_os-platform_bin.tar.gz for Linux and Solaris, and jdk-version_os-platform_bin.dmg for macOS. After you save the file, you need to run the installer by double-clicking on it or using the command line.
Follow the instructions on the screen: You need to follow the instructions on the screen to complete the update process of JDK. You can choose to overwrite your existing installation or install a new one in a different location. You will also need to agree to some additional terms and conditions during the update process.
Verify the update of JDK: After you finish the update process of JDK, you need to verify that it has been updated correctly on your system. You can do this by opening a command prompt or a terminal window and typing java -version. You should see a message that displays the updated version of Java that you have installed.
The compatibility and migration issues for JDK
When you update JDK, you might encounter some compatibility and migration issues for your Java applications and applets. These are:
Compatibility issues: These are issues that arise when your Java applications and applets do not work as expected with the updated version of JDK due to changes in the Java programming language and platform. For example, some features might be deprecated, removed, or modified in the updated version of JDK.
Migration issues: These are issues that arise when you need to modify your Java applications and applets