🐛 Bug Report:

Describe the bug

I am trying to generate the service with yaml from the petstore for typescript-fetch with the following npm command, but Its not generating any code and I am getting a error sorry just in german I've tried to translate it

   (node:23588) UnhandledPromiseRejectionWarning: Error: The command "java" is either misspelled or
    could not be found.

Steps to Reproduce

I've just installed the open-api generator like descriped into my project and also globaly with the current version: 2.4.12

  openapi-generator-cli generate -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml --generator-name typescript-fetch -o /httpServices

Expected behavior

the client is created

Screenshots

Operation System (please complete the following information):

• OS: Windows 10