Obtains the value of a field
.jfield returns the value of the specified field on an object.
.jfield(o, sig = NULL, name, true.class = is.null(sig), convert = TRUE) `.jfield<-`(o, name, value)
o |
Class name or object (Java reference) whose field is to be accessed. Static fields are supported both by specifying the class name or using an instance. |
sig |
signature (JNI type) of the field. If set to |
name |
name of the field to access |
true.class |
by default the class of the resulting object matches
the signature of the field. Setting this flag to |
convert |
when set to |
value |
value to assign into the field. The field signature is
determined from the value in the same way that parameter signatures
are determined in |
The detection of a field signature in .jfield using reflection
is considerably expensive (more than 3 additional method calls have to
be performed), therefore it is recommended for time-critical code to
specify the field signature beforehand.
NOTE: The sequence of arguments in .jfield has been changed
since rJava 0.5 to be more consistent and match the sequence in
.jcall. Also .jsimplify is no longer needed as primitive
types are obtained directly.
.jfield: contents of the field, .jfield<-: modified object.
## Not run:
.jfield("java/lang/Boolean",, "TYPE")
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.