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Tip of the Day
Language: Java
Expertise: Beginner
Oct 11, 2002

A Cleaner Way of Doing String Comparison


If you have a method into which you pass a String parameter that you compare with another string then:
 
void foo( String str )
{
  String CONST_STR = "bar";

  // DON'T COMPARE LIKE THIS:
  //if ( str == CONST_STR ) )
  // AND DON'T COMPARE LIKE THIS
  // if ( str.equals( CONST_STR ) )
  // JUST COMPARE LIKE THIS:
  if ( CONST_STR.equals( str ) )
  {}
  // OR LIKE THIS:
  if ( "bar".equals( str ) )
  {}

}

This way you don't have to protect yourself against a null being passed into the method.
Rory Cawley
 
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