Differentiate between postfix and prefix operators in java.

0 Answers   HCL,

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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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Justify your answer that you can't define a method inside another method in java, if you can then how?

0 Answers  

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In multi-threading how can we ensure that a resource isn't used by multiple threads simultaneously?

0 Answers  

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Explain access specifiers?

0 Answers   Thomson Reuters, Virtusa,

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What is the basic of java?

0 Answers  

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what are the jsp tags with example?

1 Answers   Photon,

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Difference between overloading and Overriding. <Giving a confusing example to test the concept.> (also asked in PA Consultancy Group,iflex,Value chain,IBM,CTS,Accenture, Tarang>

12 Answers   Accenture, CTS, Extensio, IBM, iFlex, PA Consulting, Symphony, Tarang,

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How many ways can you break a singleton class in java?

0 Answers  

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Can we declare a class as static?

0 Answers  

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watz the difference between abstract class and interface? Which one u ill choose as a designer?

1 Answers   Sonata,

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What are scalar data types?

0 Answers  

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