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Strings Again.......

 
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How many String objects are created when we run the following code.
String s1,s2,s3,s4;
s1 = "Hello";
s2 = s1;
s3 = s2 + "Pal";
s4 = s3;
A.1
B.2
C.3
D.4
E.We can't say.
I thought the answer is B, but the author says its C.
Any suggestions ?
 
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"Hello" (1)
"Pal" (1)
"HelloPal" (1)
=====
3
So that makes it 3.
HTH
 
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answer is c, but i think that the three strings that are created will be
"Hello"
"HelloPal"
"HelloPal"
correct me if i am wrong.
 
Greenhorn
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Hi Rajani,
I think u r wrong and Viji's reply is correct.
Lets see how it happens
String s1,s2,s3,s4;
s1 = "Hello"; ===> "Hello" created in String pool
s2 = s1; **** The previous "Hello" is used here
s3 = s2 + "Pal";===>"Pal" created in String pool then "HelloPal"
is created
s4 = s3; **** The previous "HelloPal" is used here
Hope this is clear.
Nissi

 
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s1 belongs to the pool
s2 doesn't create any string object because "Hello" is already
in the pool.
s3 doesn't belong to the pool but it is something like being
created with keyword 'new' it id created somewhere in the memory
so it is the second object which has been created
s4 ref to the same object created by s3 so it is not a new object
also it doesn't create a new string in the pool
Answer is B.
 
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