echo %JAVA_HOME% returns %JAVA_HOME%

If you are sure that you have set them properly, you can print your environment variables like JAVA_HOME using any of the below methods in Windows 10.

1. Windows Command prompt ( cmd.exe )

   C:\>echo %JAVA_HOME%
   C:\Program Files\Java\jdk1.7.0_80
   

2. Git Bash within windows, you need to use the bash format

   user12231@TP-UN103 MINGW64 /c
   $ echo $JAVA_HOME
   C:\Program Files\Java\jdk1.7.0_80
   

3. From the conversation, it looks like you are using Windows 10 powershell.
   To print the environment variable in windows powershell, use one of the following commands as below

   PS C:\>Get-ChildItem Env:JAVA_HOME
   
   Name                           Value
   ----                           -----
   JAVA_HOME                      C:\Program Files\Java\jdk1.7.0_80
   

   or

   PS C:\> echo $env:JAVA_HOME
   C:\Program Files\Java\jdk1.7.0_80
   

   ---

   You can refer the Powershell documentation here.

   https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_environment_variables?view=powershell-6#displaying-environment-variables