Is JRE required to compile Java files ?

4 Answers   HCL,

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what ide u r using and wat version, how wil u build the project etc ?

2 Answers  

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How to sort a vector elements that contains the user define class object? (Note: If Suppose consider, A Student class contain two data members. They are String studentName and int rollNo. I am creating Four objects for this class, each object contains students details like name and roll no. Now i am storing that objects in vector and if i retiving the elements from the vector means then it should be display in sorting order)

3 Answers   ProdEx Technologies,

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Explain class A{} class B{} class C{} all the three classes are saved in a single file name, what the name should i provide to the file ,in what file name should i run the program? Ple Explain

9 Answers   DNS, Infosys, TCS,

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How will you communicate between two applets?

0 Answers  

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How to implement Singleton

6 Answers   DELL,

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Does java vector allow null?

0 Answers  

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What is difference between path and classpath?

0 Answers  

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What is "finally" keyword?

10 Answers  

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Can a class have a static inner class?

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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what is the difference between applet and swing and gui application in java . What we do with the collections set and list interface

2 Answers   CTS, Phoenix Technologies,

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