'java' is not recognized as an internal or external command, operable program or batch file

Question

When I open the Windows 10 command line and write "java -version" at the cursor, the response is: java version "1.8.0_391" Java(TM) SE Runtime Environment (build 1.8.0_391-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.391-b13, mixed mode)

However, when I use the OSGeo4W Shell command line, and type "java -version", the response is: 'java' is not recognized as an internal or external command, operable program or batch file.

When I try to use the Whitebox Tools tools for rasters, this error message appears: 'java' is not recognized as an internal or external command, operable program or batch file. Process returned error code 1

How to fix this error?

Answer 1

In your OSGeo4W window, check the value of JAVA_HOME environmental variable. This example is from my computer:

C:\OSGeo4W>set java_home
JAVA_HOME=C:\Program Files\Eclipse Adoptium\jdk-11.0.21.9-hotspot\

Add bin at the end of the java directory and append that path into the OSGeo4W search path

C:\OSGeo4W>set path=%path%;C:\Program Files\Eclipse Adoptium\jdk-11.0.21.9-hotspot\bin

Now java is found.

C:\OSGeo4W>java -version
openjdk version "11.0.21" 2023-10-17
OpenJDK Runtime Environment Temurin-11.0.21+9 (build 11.0.21+9)
OpenJDK 64-Bit Server VM Temurin-11.0.21+9 (build 11.0.21+9, mixed mode)

For making the change permanent edit the o4w_env.bat file that is located in the [OSGEO4W_ROOT]/bin directory. The line to edit is

set path=%OSGEO4W_ROOT%\bin;%WINDIR%\system32;%WINDIR%;%WINDIR%\system32\WBem

Add your java bin directory at the end of the line.

After updating OSGeo4W with the installer program, check if the bat file has been overwritten.