TIOBE - Java Coding Standard

Rule: Design42

Synopsis:	Substitute calls to size() == 0 (or size() != 0) with calls to isEmpty()
Language:	Java
Severity Level:	4
Category:	Design

Description:

The isEmpty() method on java.util.Collection is provided to see if a collection has any elements. Comparing the value of size() to 0 merely duplicates existing behavior.

public class Foo {
  void good() {
    List foo = getList();
    if (foo.isEmpty()) {
      // blah
    }
  }

  void bad() {
    List foo = getList();
      if (foo.size() == 0) {
       // blah
      }
    }
  }
}