How to download xlsx package

[Michell Payano]

Hi,

I am a begginer in R and I want to know what to do in order to download the xlsx package in order to use the function read.xlsx. Every time I write library(xlsx) I get this answer:

Error: package or namespace load failed for ‘xlsx’:

 .onLoad failed in loadNamespace() for 'rJava', details:

  call: fun(libname, pkgname)

  error: JAVA_HOME cannot be determined from the Registry

Thanks for your help.