R Loading xlsx problem

require(xlsx)
Loading required package: xlsx
Loading required package: rJava
Error : .onLoad failed in loadNamespace() for 'rJava', details:
  call: fun(libname, pkgname)
  error: No CurrentVersion entry in Software/JavaSoft registry! Try re-installing Java and make sure R and Java have matching architectures.
Failed with error:  ‘package ‘rJava’ could not be loaded’


Problem answered by http://stackoverflow.com/questions/17376939/problems-when-trying-to-load-a-package-in-r-due-to-rjava

The reason is probably linked to the fact you are using a 64-bit OS and R version but do not have Java installed with the same architecture. What you have to do is to download Java 64-bit from this page: https://www.java.com/en/download/manual.jsp After that just try to reload the xlxs package. You shouldn't need to re-start R.