Fail updating forge1.15.2

[NeatFoxes]

I just uninstalled my java of old version and installed a new version.

F:\Minecraft\forge>gradlew.bat setupDecompWorkspace

ERROR: JAVA_HOME is set to an invalid directory: C:\Program Files\Java\jdk1.8.0_241\bin\java.exe

Please set the JAVA_HOME variable in your environment to match the
location of your Java installation.

Help me,please.

[NeatFoxes]

I've updated my variable value of "JAVA_HOME" in "Environment variables",but it still doesn't work.

[NeatFoxes]

Oh I restarted my computer and solved this problem.Thank you all the same,@diesieben07