.jnew
create a new Java object.
.jnew(class, ..., check=TRUE, silent=!check, class.loader=NULL)
fully qualified class name in JNI notation (e.g. "java/lang/String"
).
Any parameters that will be passed to the corresponding
constructor. The parameter types are determined automatically and/or
taken from the jobjRef
object. For details see
.jcall
. Note that all named parameters are discarded.
If set to TRUE
then .jcheck
is invoked before
and after the call to the constructor to clear any pending Java
exceptions.
If set to FALSE
then .jnew
will fail with an error if
the object cannot be created, otherwise a null-reference is returned
instead. In addition, this flag is also passed to final
.jcheck
if check
above is set to TRUE
. Note
that the error handling also clears exceptions, so
check=FALSE, silent=FALSE
is usually not a meaningful
combination.
optional class loader to force for loading the class. If not set, the rJava class loader is used first. The default Java class loader is always used as a last resort. This is for expert use only! If you set the class loader, the class loading behavior changes - use only in very special circumstances.
Returns the reference (jobjRef
) to the newly created object or
null
-reference (see .jnull
) if something went wrong.
# NOT RUN {
f <- .jnew("java/awt/Frame","Hello")
.jcall(f,,"setVisible",TRUE)
# }
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