Returns a Java object reference (jobjRef) to the object
obj, changing the object class.
Arguments
obj
a Java object reference
new.class
fully qualified class name in JNI notation
(e.g. "java/lang/String").
check
logical. If TRUE, it is checked that the object
effectively is an instance of the new class. See %instanceof%.
Using FALSE (the default) for this argument, rJava does not perform type check and this
will cause an error on the first use if the cast is illegal.
convert.array
logical. If TRUE and the object is an array,
it is converted into a jarrayRef reference.
Details
This function is necessary if a argument of .jcall or
.jnew is defined as the superclass of the object to be
passed (see .jcall). The original object is not modified.
The default values for the arguments check and convert.array
is FALSE in order to guarantee backwards compatibility,
but it is recommended to set the arguments to TRUE