TIOBE - Java Coding Standard

Rule: Design20

Synopsis:	Avoid idempotent operations (like assigning a variable to itself)
Language:	Java
Severity Level:	2
Category:	Design

Description:

Avoid idempotent operations - they are have no effect.

public class Foo {
 public void bar() {
  int x = 2;
  x = x;
 }
}