What are recursive functions? Give some examples?
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Can substring create new object?
Explain the init method?
How will you print number in reverse (descending) order in BST.
How to reverse string in java?
What is java autoboxing?
Write the code for Palindrome ?
What is an escape character in java?
what is the role of xml in core java?? and how we can use it?? can somebody give a sample program with explanation and from where i can read more about xml?????
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I want to control database connections in my program and want that only one thread should be able to make database connection at a time. How can I implement this logic?
What is collection class in java?
Can a hashset contain duplicates java?
What is a function in java?
Core Java 
