q on strings - abhilash's exam

[JayaSiji Gopal]

  
 
 Read this piece of code carefully 
 
if("String".replace('g','G') == "String".replace('g','G')) 
    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 1, but the correct ans is 2. plz explain y?
 

 

[Barry Gaunt]

Read the API!

[Ramy M. Kamel]

JayaSiji,

I think you should focus a little before studying for the exam.

It will hurt you to ask questions about these fundamental issues, which you must master before taking the exam.

Anyway, String is a immutable class, meaning that each method that would alter its contents will return a new String instance .

So, the replace method returns a new String instance, which is the reason why th equality operators returns false; they are two different objects.