q from abhilash mock exam on strings.

[JayaSiji Gopal]

  
 
Read this piece of code carefully 
 
if("String".trim() == "String".trim()) 
    System.out.println("Equal"); 
else 
    System.out.println("Not Equal");
 
Answers 
 
the code will compile an print "Equal". 
the code will compile an print "Not Equal". 
the code will cause a compiler error 
 
I answered the 2nd option, but the correct option is 1, plz explain y?
 

 

 

 

 

[Barry Gaunt]

Read the API!

[Colin Cullen]

For a deeper understanding to your puzzle check out:

JLS 3.10.5 String Literals

Or the excellent article on JavaRanch
The SCJP Tip Line -- Strings, Literally
by Corey McGlone

Enjoy!

[Win jones]

if(" String ".trim() == " String ".trim())     
System.out.println("Equal"); 
else     
System.out.println("Not Equal");
 

Print Not Equal - if the trim function does not have anything to trim then new strings are not created (remeber String is immuatable).

[ankur rathi]

Colin please can you give URL for that article which is on java ranch .