Invoking a method designed to return a string representation of an object which is already a string is a waste of keystrokes. This redundant construction may be optimized by the compiler, but will be confusing in the meantime.

Noncompliant Code Example

String message = "hello world";
System.out.println(message.toString()); // Noncompliant;

Compliant Solution

String message = "hello world";
System.out.println(message);