Difference between Preemptive scheduling vs. Time slicing?
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which class to use when concatenating strings in a loop.
What is JFC?
Can a class have 2 constructors?
Is hashset sorted in java?
what are the different non-access specifiers in java?
In which JDK version event-delegation model is introduced?
What is the difference between call by reference and call by pointer?
my method "abc" return array of interface "xyz" and "pqr" is abstract class implements abc and class "jkl" extends pqr My problem 1) when i call abc it retrun array xyz how can i do this hint xyz refer_xyz = new jkl(); but i can't create array. 2)I want to access method of jkl using reference of xyz??
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what is the purpose of "virtual"?