package.class.variable or package.class.method()
In Java the parens are needed if calling a method, even if no parameters are passed. NetRexx does not require the parens if no parms are passed, unless calling a contructor to create a new object. To further complicate things, package names can have multiple levels (such as java.lang) also separated by periods, leading to references like this:
If variable OBJ contains the handle of an object with a method named "query", you would call the query method as follows:
This syntax does not make it obvious where something really lives when you access it! Thus looking at our first example "Hello World" program we see:
It is not obvious that "System" is a class containing a variable "out"
which points to an object with a method named "println", rather than a
class named "out" with a method named "println" in a package named
"System". There seems to be a recommended convention of beginning class
names with a capital letter, which helps somewhat.