Google App Engine JSP can't deploy: java.lang.RuntimeException: Cannot get the System Java Compiler. Please use a JDK, not a JRE

Question

this is hopefully something simple but... Eclipse has been working relatively fine for everything except deploying to GAE.

I can run my GAE app locally, but when I

Answer 1

Removing the JRE file located in my C:/Program Files(*86)/Java folder , reopening the eclipse IDE resolved the issue.

I had Java JDK installed in my C:/Program Files/Java folder which was not detected earlier.