What is preflight request?

0 Answers  

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Which collection is best for sorting in java?

0 Answers  

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Why super is first line in java?

0 Answers  

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Can we use a switch statement with strings?

0 Answers  

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What is a Hash Table? What are the advantages of using a hash table?

0 Answers   Ciena,

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Difference between error and exception

3 Answers   Nous, TCS,

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What is the purpose of garbage collection in java, and when is it used?

0 Answers  

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Hi Friends, can u give me Real Time example for interface and abstract class.(With Banking Example)

4 Answers  

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What will happen if we write code like: try{}catch(exception e)catch(IOException i)

6 Answers   CTS, TCS,

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How are java objects passed to a method and what are native methods?

0 Answers   Genpact,

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how many types of cloning?

4 Answers   Mobily,

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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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