Is stringwriter thread safe?

0 Answers  

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What is deserialization?

0 Answers  

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What is the diff. b/w Interfaces & Abstract class?

6 Answers   Ericsson,

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What is a locale?

0 Answers   Aspire, Infogain,

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Which of the following is not an isolation level in the JDBC

0 Answers   CTS,

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What is Java exception handling?

1 Answers  

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What do you mean by constant time complexity?

0 Answers   Amazon,

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public class AboutStrings{ public static void main(String args[]){ String s1="hello"; String s2="hel"; String s3="lo"; String s4=s2+s3; //to know the hash codes of s1,s4. System.out.println(s1.hashCode()); System.out.println(s4.hashCode()); // these two s1 and s4 are having same hashcodes. if(s1==s4){ System.out.println("s1 and s4 are same."); }else System.out.println("s1 and s4 are not same."); } } Somebody told me that, == operator compares references of the objects. In the above example even though s1 and s4 are refering to same object(having same hash codes), it is printing s1 and s4 are not same. Can anybody explain in detail why it is behaving like this? Thanks in Advance RavuriVinod

4 Answers   TCS,

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How do you escape json?

0 Answers  

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How do you escape a string?

0 Answers  

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Implement a stack with push (), pop() and min() in O(1) time.

0 Answers   Amazon,

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What is externalizable?

0 Answers  

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