How many string objects

[Sneha Kapoor]

Hi All,

  
11. public String makinStrings() {
12. String s = “Fred”;
13. s = s + “47”;
14. s = s.substring(2, 5);
15. s = s.toUpperCase();
16. return s.toString();
17. }
How many String objects will be created when this method is invoked?
A. 1
B. 2
C. 3
D. 4
E. 5
F. 6
 

As per understanding there are 3 objects 1)Fred 2)47 3)s.toString(); on line 16

am i right??

[Vijitha Kumara]

Please QuoteYourSources. Simple search for "fred 47" in the forum will give you the answer for this.

[Sneha Kapoor]

Source: VoodooExam

[Vijitha Kumara]

Except toString() method all other operations will create a new object ( except s=s+"47" will make 2). For scjp level this is correct (as there are little more to this with regards to the String constants as they may have created already before the method invoked, at the class loading).

[Ankit Garg]

Look here

http://www.coderanch.com/t/434127/Programmer-Certification-SCJP/certification/many-String-Objects-are-created#1930019