CODEWITHSUNDEEP
javarscalar-package
Soroush Homayounpour
Soroush Homayounpour

Reputation: 5

A Checker function in a R package that finds the version of JDK installed in the client machine

I am new to developing a package in R and I was wondering if someone can lead me in the right direction?

My problem

I am writing a package in R that calls Scala code. So to develop this package I assume that JDK (Java Development Kit) 1.8 is installed on any machine that uses my package.

I want to know how I can write a function that checks if Java is being installed in the machine. If so, what is its version? If Java is not installed then it prompts a message and notifies the user about the problem.

Upvotes: 0

Views: 218

Answers (1)

Gregor Thomas
Gregor Thomas

Reputation: 145965

On my machine:

> x = system2("java", args = "-version", stdout = TRUE)
> x
[1] "java version \"1.8.0_261\""                                      
[2] "Java(TM) SE Runtime Environment (build 1.8.0_261-b12)"           
[3] "Java HotSpot(TM) 64-Bit Server VM (build 25.261-b12, mixed mode)"

Upvotes: 1

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