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This function connects the R environment to a gateway server that runs in Java.
connectToJava(
port = 18011,
extensionPath = NULL,
memorySize = NULL,
debug = FALSE
)the local port (the port is set to 18011 by default)
the path to jar files that can be loaded by the system classloader
the memory size of the Java Virtual Machine in Mb (if not specified, the JVM runs with the default memory size)
for debugging only (should be left as is)
a logical TRUE if the function managed to get connected to the server or if it was already connected or FALSE if the connection has failed