Question

I am wondering about the the following piece of Java code:

“System.out.println”. I am right about this:

“System” is a static class. “.out” is a method of class “System”. This is the bit I am slighty confused about “.println”– what class / object is this a method of?

Also, is this concept known as “method chaining”?

Thanks

GF

Answer 1

No, it’s not method chaining. You’re right about System being a class (just a regular class, not “static” – only inner classes can be static), but out is a static field of the class (of the type java.io.PrintStream), and only println() is a method of PrintStream.

This is an example of method chaining:

String s = "Long String ".toUpperCase().substring(4).trim()