This week's book giveaway is in the Other Languages forum.
We're giving away four copies of Functional Reactive Programming and have Stephen Blackheath and Anthony Jones on-line!
See this thread for details.
Win a copy of Functional Reactive Programming this week in the Other Languages forum!
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic

Question from valiveru mock exam

 
sanjana narayanan
Ranch Hand
Posts: 142
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi,
I would like to know the answer for this question. How many strings are created in the follo program.
String s1,s2,s3,s4;
s1 = "Hello";
s2 = s1; //s2="Hello"
s3 = s2 + "Pal"; //s3="Hello Pal"
s4 = s3;//s4="Hello Pal"
According to me, 2 strings(Hello & Hello Pal) are created. But the ans given is 3.
can anyone explian this?
-Sanjana
 
David Hadiprijanto
Ranch Hand
Posts: 52
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Sanjana,

in the above line, two strings are created, "Pal" and "Hello Pal".
Hence, the answer to the question is 3 strings are created, "Hello", "Pal", and "Hello Pal".
Hope this helps.
 
dennis zined
Ranch Hand
Posts: 330
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
A new String is created at s1. s2 points to the same string as s1 but no new strings are created. A new String "Pal" is created (which makes the count now to 2) and another string forming "Hello Pal" (count now is three). s4 points to the same string as s3 but no new strings are created.
 
srini v
Greenhorn
Posts: 11
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Dear All:
In debug mode, when constructing a string, I want go into string constructor source.
I am using JBuilder6.
Cheers
 
dennis zined
Ranch Hand
Posts: 330
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
In debug mode, when constructing a string, I want go into string constructor source

IDE's and Other Tools should be the proper forum for your post
 
sanjana narayanan
Ranch Hand
Posts: 142
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Thank u guys..
-Sanjana
 
  • Post Reply
  • Bookmark Topic Watch Topic
  • New Topic