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Check Java Version with a Specified JAVA_HOME Using a Separate R Session

Source: R/java_env.R
java_check_version_rjava.Rd

This function sets the JAVA_HOME environment variable, initializes the JVM using rJava, and prints the Java version that would be used if the user sets the given JAVA_HOME in the current R session. This check is performed in a separate R session to avoid having to reload the current R session. The reason for this is that once Java is initialized in an R session, it cannot be uninitialized unless the current R session is restarted.

Usage

java_check_version_rjava(java_home = NULL, quiet = FALSE, .use_cache = FALSE)

Arguments

java_home

Path to Java home directory. If NULL, the function uses the JAVA_HOME environment variable.

quiet

A logical value indicating whether to suppress messages. Can be TRUE or FALSE.

.use_cache

Logical. If TRUE, uses cached results for repeated calls with the same JAVA_HOME. If FALSE (default), forces a fresh check. Set to TRUE for performance in loops or repeated checks within the same session.

Value

A character vector of length 1 containing the major Java version, or FALSE if rJava is not installed or the version check fails.

Examples

if (FALSE) { # \dontrun{
java_check_version_rjava()
} # }