suggests rJavaEnv

Author: rafapereirabr

README.md

@@ -40,12 +40,17 @@ You can install `r5r`:
 
 Please bear in mind that you need to have *Java Development Kit (JDK) 21* installed on your computer to use `r5r`. No worries, you don't have to pay for it. There are numerous open-source JDK implementations, any of which should work with `r5r`. If you don't already have a preferred JDK, we recommend [Adoptium/Eclipse Temurin](https://adoptium.net/). Other open-source JDK implementations include [Amazon Corretto](https://aws.amazon.com/corretto/), and [Oracle OpenJDK](https://jdk.java.net/21/). You only need to install one JDK.
 
-If you don't know what version of Java you have installed on your computer,
-can check it by running this on R console.
+The easiest way to install JDK is using the new [{rJavaEnv}](https://www.ekotov.pro/rJavaEnv/) package in R:
 
 ```R
-rJava::.jinit()
-rJava::.jcall("java.lang.System", "S", "getProperty", "java.version")
+# install.packages('rJavaEnv')
+
+# check version of Java currently installed (if any) 
+rJavaEnv::java_check_version_rjava()
+
+# install Java 21
+rJavaEnv::java_quick_install(version = 21)
+
 ```
 
 ## Usage

r-package/DESCRIPTION

@@ -61,6 +61,7 @@ Suggests:
     knitr,
     parallel,
     patchwork,
+    rJavaEnv,
     rmarkdown,
     testthat
 VignetteBuilder: 

r-package/vignettes/r5r.Rmd

@@ -60,11 +60,24 @@ numerous open-source JDK implementations, and you only need to install one JDK.
 - [Amazon Corretto](https://aws.amazon.com/corretto/)
 - [Oracle OpenJDK](https://jdk.java.net/21/). 
 
+The easiest way to install JDK is using the new [{rJavaEnv}](https://www.ekotov.pro/rJavaEnv/) package in R:
 
-If you don't know what version of Java you have installed on your computer, you can check it by running this on R console.
 ```{r, eval = FALSE}
-  rJava::.jinit()
-  rJava::.jcall("java.lang.System", "S", "getProperty", "java.version")
+# install {rJavaEnv} from CRAN
+install.packages("rJavaEnv")
+
+# check version of Java currently installed (if any) 
+rJavaEnv::java_check_version_rjava()
+
+## if this is the first time you use {rJavaEnv}, you might need to run this code
+## below to consent the installation of Java.
+# rJavaEnv::rje_consent(provided = TRUE)
+
+# install Java 21
+rJavaEnv::java_quick_install(version = 21)
+
+# check if Java was successfully installed
+rJavaEnv::java_check_version_rjava()
 
 ```