Need help to build jar & update it

I am a newbie to using Gradle.

Need steps to build & update an existing jar file [update the JDK update version].

Gradle install is successful & i am able to run the gradle -v command.

Have now place the ‘gradle-wrapper.jar’ at “C:\Gradle\gradle-6.4\bin” & trying to build the jar using the commands: >gradle build grade-wrapper.jar & it fails with this error:

FAILURE: Build failed with an exception.

  • What went wrong:
    Task ‘gradle-wrapper’ not found in root project ‘bin’.

Do let me know how to move ahead.