Set JAVA_HOME environment variable on Windows 10

Java Setup

Install JDK and set JAVA_HOME

Download the Java Development Kit (JDK)

Then double click the JDK and follow all the installation steps.

To set JAVA_HOME on a Windows 10:

Tested with:

1. Windows 10
2. JDK 1.9

JAVA_HOME is the name of an environment variable on the operating system that points to the installation directory of JDK (Java Development Kit) or JRE (Java Runtime Environment).

Example:

JAVA_HOME = C:\Program Files\Java\jdk-19

1. Identify the Java home directory, which is generally under C:\Program Files\Java directory.

2. Advanced System Settings

Open the System Environment Variables dialog by typing environment in the search area on Start menu

Click the button Environment Variables

Create the JAVA_HOME environment variable by clicking the New button at the bottom.

In the New System Variable form, enter the name and value as follows:

JAVA_HOME
C:\Program Files\Java\jdk-19

Click OK, and you will see the JAVA_HOME variable is added to the list.

Update the PATH system variable. In the Environment Variables dialog, select the Path variable and click Edit:

Then in the Edit environment variable dialog, double click on the empty row just below the last text line, and enter %JAVA_HOME%\bin as follows:

The percent signs tell Windows that it refers to a variable JAVA_HOME, and the \bin specifies the location of java.exe and javac.exe programs which are used to run and compile Java programs, as well as other tools in the JDK. Click OK button to close all the dialogs. Now open application to verify. Or open a command prompt and type the following:

java -version
java version "19.0.1" 2022-10-18
Java(TM) SE Runtime Environment (build 19.0.1+10-21)
Java HotSpot(TM) 64-Bit Server VM (build 19.0.1+10-21, mixed mode, sharing)


javac -version
javac 19.0.1

Summary

You can add the path to the bin directory of Java home directly into the PATH variable, but it is recommend to follow the above steps to setup a JAVA_HOME variable because many Java programs depend on it. When you installed a JDK, this might not need to update the system variable because the installer already did it.

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