What is the root class for all Java classes?

8 Answers   IBM, Infosys,

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What is floor math?

0 Answers  

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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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garbate collector(GC)?

4 Answers  

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What does the “static” keyword mean? Can you override private or static method in java?

0 Answers  

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How do you create immutable object in java?

0 Answers  

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What is the destroy method?

0 Answers  

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how to accept integer array in java

2 Answers   Tech Guru,

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Can we have any code between try and finally blocks?

0 Answers  

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Is java a software?

0 Answers  

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What are the different types of inner classes?

0 Answers  

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How do you reverse a list?

0 Answers  

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