Any additional classes to include in the Java class
paths (i.e. locations of Java classes to use). This path will be
prepended to paths specified in the CLASSPATH environment
variable.
parameters
character vector of parameters to be passed to
the virtual machine. They are implementation dependent and apply
to JDK version 1.2 or higher only. Please note that each parameter
must be in a separate element of the array, you cannot use a
...
Other optional Java initialization parameters (implementation-dependent).
silent
If set to TRUE no warnings are issued.
Value
The return value is an integer specifying whether and how the VM was
initialized. Negative values indicate failure, zero denotes successful
initialization and positive values signify partially successful
initilization (i.e. the VM is up, but parameters or class path could
not be set due to an existing or incompatible VM).
Details
Stating with version 0.3-8 rJava is now capable of modifying the class
path on the fly for certain Sun-based Java virtual machines, even when
attaching to an existing VM. However, this is done by exploiting the
way ClassLoader is implemented and may fail in the future. In general
it is officially not possible to change the class path of a running
VM.
At any rate, it is impossible to change any other VM parameters of a
running VM, so when using .jinit in a package, be generous with
limits and don't use VM parameters to unnecessarily restrict
resources.