What collections you have worked on? Internal working of Hashmap?

1 Answers   Bravura Solutions,

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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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Can you make a constructor final?

0 Answers  

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What is an enumeration?

0 Answers  

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write a program to create an arraylist with string(add,remove) operation.and value should be enter through keyboard.

0 Answers   Axcend,

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Why set is used in java?

0 Answers  

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What is computer compiler?

0 Answers  

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Difference between a process and a program?

0 Answers   Infosys,

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Can we override constructors?

0 Answers  

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Can we overload final method in java?

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What is keyword in oop?

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What is super keyword explain with example?

0 Answers  

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