15. trim() with Input data



Answer:
  • Has the trim() method been used correctly?     Yes
  • How many objects have been created?     2 --- the first literal and the new String created by trim()


trim() with Input data





    









    
The trim() method creates a new String. The new String contains the same characters as the old one but has whitespace characters (blanks, tabs, and several other non-printing characters)
        removed from both ends (but not from the middle). So, for example, after the last statement





    

        
String userData = "     745   ";
String fixed;

fixed = userData.trim();

    





    
the new String referenced by fixed will contain the characters "745" without any surrounding spaces.

    
(Usage Note:) This method is often useful. Extraneous spaces on either end of user input is a common problem.










Question 15:
Inspect the following:
    String dryden = "   None but the brave deserves the fair.   " ;
System.out.println( "|" + dryden.trim() + "|" );
What is printed out?