What is a concrete classes? Is Java object class is concrete class?
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What happens if a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the body of the try statement?
What is the use of singleton?
what is inner class in java?
Which class is the superclass for all the classes?
explain the life cycle of thread?
10 Answers CTS, NIIT, TCS,
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.
Hi, This is ravi i have a question like this i have string "UNDERSTAND" now i want to count the letters how many times it occures.i.e from the above string the out put should be like this U-1,N-2,D-2,E-1,R-1,S-1,T-1,A-1. how can i achieve this Thnaks in advance for your response ..
Can singleton class be serialized?
What is the difference between numeric and integer?
Why is prepared Statement, Callable Statement used for? What is the need of Batch updates?
How to use Media tracker Class.
Define interface in java?