Как установить openjdk на windows 10

This tutorial provides all the steps required to install OpenJDK 18 on Windows 10. The steps to install OpenJDK 18 on other versions of Windows should be similar to the steps explained in this tutorial.

You may also install the popular IDEs to develop Java applications by following — How To Install Eclipse For Java On Windows, How To Install IntelliJ IDEA for Java on Windows, and How To Install VSCode For Java On Windows. You may also follow the How To Install OpenJDK 18 On Ubuntu to install the latest OpenJDK on Ubuntu and How To Install Java 18 On Ubuntu to install Oracle JDK.

Step 1 — Download OpenJDK

Open the JDK 18 GA Release site and download the distribution for Windows as highlighted in Fig 1.

Click the zip download link as highlighted in Fig 1 to download OpenJDK for Windows. Also, verify your download using the given sha256 checksum.

Step 2 — Install OpenJDK

Extract the downloaded zip to the desired location. In my case, I have extracted the downloaded zip to C:javaopenjdk. The final path should be C:javaopenjdkjdk-18.0.1.1.

This is the only step required to install OpenJDK on windows.

Step 3 — Set Environment Variables

In this step, we will configure the environment variables to use the OpenJDK from Command Prompt. Open Command Prompt and check the installed version of Java using the command java -version as shown in Fig 2.

It shows the version of Java 18 since my current version of Java is 18. In your case it might show another version of Java if it’s already installed, else it will show the message — Java is not recognized as internal or external command, operable program or batch file.

Right Click -> My Computer(This PC) -> Properties -> Advanced System Settings

The above steps will open the Windows Settings Panel as shown in Fig 3.

Now click the Environment Variables Button, select Path under the System Variables section, and click the Edit Button. We need to add the path of installed JDK to the system Path.

Click on the New/Edit Button and add/update the path to the installed JDK bin which is C:javaopenjdkopenjdk-18.0.1.1bin in our case. You might be required to update the path if it already exists. It should look like Fig 4.

Press the OK Button 3 times to close all the windows. This sets the JDK 18 on system environment variables to access the same from the console.

Notes: Remove existing PATH values specific to previously installed Java. Also update JAVA_HOME, in case it was already set. Also, you might be required to remove the previously installed JDK from the Global Path as shown in Fig 5.

Now again open the console and test the Java version as shown in Fig 6. Make sure to use a new console to test the version of the newly installed OpenJDK 18.

It must show the OpenJDK version as shown in Fig 6. You might need to restart the system in case it does not reflect the JDK version installed by us.

Getting started with Java — Hello World

In this step, we will write, compile, and execute our first program in Java using the standard Hello World example.

Now write the first Java program as shown below, save the program as HelloWorld.java and exit the editor. Make sure that the class name and file name are the same.

class HelloWorld {
	public static void main( String[] args ) {
		System.out.println( "Hello World !!n" );
	}
}

Now open the command prompt and navigate to the path where you have saved your Java program. Use the below-mentioned commands to compile and execute the program.

# Compile - Specify file name and extension
javac HelloWorld.java
# Execute - Spicy file name
java HelloWorld
# Output
Hello World !!

These are the easy-to-install steps required to install OpenJDK on Windows and write and execute the Java program.

Summary

This tutorial provided the steps required to download and install the most recent versions of OpenJDK i.e. JDK 18 and also provided the steps to write, compile, and execute the first Java program.

Open Java Development Kit (OpenJDK) is an open source implementation of the Java Standard Edition (Java SE) platform with contribution from Oracle and the open Java community. For more information, see OpenJDK.

Open JavaFX (OpenJFX) is an open source, next generation client application platform for desktop, mobile and embedded systems built on Java. For more information, see JavaFX.

Before JDK version 9, JavaFX libraries were included in the JDK distribution. Since JDK version 9, JavaFX (JFX) is provided as a separate package.

This document explains how to install the OpenJDK version 12 along with OpenJFX libraries for the following operating systems:

• Windows
• Linux
• MacOS

Install OpenJDK

To install OpenJDK, you must download it as follow:

1. Download the OpenJDK version 12 from https://jdk.java.net/archive/.
2. Extract the .tar file. The jdk-12.0.2 folder appears.

Install OpenJDK for Windows

This section explains how to install the OpenJDK version 12 for Windows:

1. Go to Start > Control Panel > System and Security > System.

2. Click Advanced system settings. The System Properties window appears.

3. Click Environment Variables…. The Environment Variables window appears.

4. Click New… in the User variables for <user name> section.

   Note If your JAVA_HOME variable is already created, select it and click Edit….

5. Enter JAVA_HOME in the variable name field and the JDK directory path, for example, C:UsersuserDesktopjdk-12.0.2, in the Variable value field.

6. Click OK. The Environment Variables window appears.

7. If you cannot find JAVA_HOME in System variables section, add the variable by repeating the 4, 5, and 6 steps.

8. Save and close the Environment Variables window.

9. Launch Command Prompt.

10. Run the following command to verify whether the OpenJDK version 12 is installed:

    java -version
    

Install OpenJDK for Ubuntu

This section explains how to install the OpenJDK version 12 for Ubuntu:

1. Launch the Terminal application.

2. Run the following command in the terminal to set the JAVA_HOME as OpenJDK directory path, for example:

   JAVA_HOME=/home/<username>/Desktop/openJDK/jdk-12.0.2/
   

3. Run the following commands in the terminal:

   sudo update-alternatives --install /usr/bin/java java ${JAVA_HOME}/bin/java 20000
   sudo update-alternatives --install /usr/bin/javac javac ${JAVA_HOME}/bin/javac 20000
   

4. Run the following command to get a list of JDK versions installed:

   sudo update-alternatives --config java
   

   Note If there are multiple JDK installed, select the required java version by entering the selection number.

5. Run the following command:

   sudo update-alternatives --config javac
   

   Note javac is for compilation. For more information on differences between java and javac, see https://docs.oracle.com.

6. Select the required javac version as mentioned above.

7. Run the following command to verify whether the OpenJDK version 12 is installed:

   java -version
   

Install OpenJDK for MacOS

This section explains how to install the OpenJDK version 12 for macOS:

1. Copy the downloaded jdk folder to the Library/Java/JavaVirtualMachines location. This is the default location where all the JDKs are available. Use the following command to copy the JDK directory.

   cp -aR <downloaded_jdk_path> /Library/Java/JavaVirtualMachines/
   

2. Launch Terminal application.

3. Run the following command to verify whether the OpenJDK version 12 is installed:

   java -version
   

   Note If the OpenJDK version 12 is not installed, add the export JAVA_HOME = /Library/Java/JavaVirtualMachines/jdk-12.jdk/Contents/Home command in the .profile or .bash_profile file.

Install OpenJFX

After installing OpenJDK, install the OpenJFX:

1. Download the OpenJFX version 11 from https://gluonhq.com/products/javafx.

   Note Download the appropriate JavaFX product for your operating system.

2. Extract the downloaded zip file.

3. Copy all files in lib folder to lib folder of JAVA_HOME.

   Note

   On Ubuntu, run the following command:

   cd javafx-sdk-11.0.1
   sudo cp -arf lib/* ${JAVA_HOME}/lib/
   

4. Copy all files in bin folder to bin folder of JAVA_HOME.

   Note This step is only required for Windows.