Sample code to retrieve objects from HashMap in sorted
ascending order?
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Write a program to check string is palindrome without using loop?
What is a concrete classes? Is Java object class is concrete class?
What is serialversionuid?
what is multithreading?
How to sort elements in a parallel array in java?
Why we used vector class?
Give differences between Quicksort & Mergesort. When should these sorts be used and what is their running time?
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Can inner class extend any class?
What is immutability in java?
What are inner classes or non static nested classes in java?
Difference between arraylist and vector.