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what are the major differences between jdk1.4 and jdk1.5?
 Question Submitted By :: Core-Java
I also faced this Question!!     Answer Posted By  
# 1
The major enhancement for JDK 1.5 version
Language Features:
1. Generics
2. Enhanced for loop
3. Autoboxing/Unboxing
4.Type Safe Enums
5. Varargs
6. Static import
7. Annotations
Is This Answer Correct ?    38 Yes 2 No
# 2
in jdk1.5 use operater overloading but in jdk1.4 not use this 
Is This Answer Correct ?    8 Yes 7 No
Lashmandeep Singh 8054411133 C

Other Core Java Interview Questions
  Question Asked @ Answers
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 TCS 4
what is a transient variable?   5
I have a sorting issue with a Hashmap. My constraint is that I MUST use the Hashmap and work with existing code. I do a database query and place the results in a Hashmap. When I iterate thru the Hashmap, it loses the original alphabetical sorting done by the database. So, my problem is that I must sort the results coming out of the Hashmap which is then placed into another class.   1
How we get some middle records in one table? 3i-Infotech 1
Explain different ways of passing arguments to sub-routine?   1
does core java and j2se both are same?   5
what is difference betwwen hashmap and hashtable ? Fidelity 7
what is the replacement for GOTO in java? CTS 2
What is unicode?   5
How a class can implement an interface? SysArc 5
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> Symphony 12
Does any tag exists in HTML to upload and download files ?   3
For more Core Java Interview Questions Click Here 

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