What is boolean used for?
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Which sorting algorithm is best in java?
Difference between arraylist and hashset in java?
Why is core java important?
What is oop principle in java?
What is the use join() in Threads ?
Does java vector allow null?
Explain, why the constructor is required in implemented class?
What is treemap in java?
What is the catch or declare rule for method declarations?
Suppose there is a System A which gives some output. This output is used as input by system B. The rate at which System A produces is faster than the rate at which system B consumes it. How can you improve this?
How to convert a string to long?
if arraylist size is increased from initial size what is the size of arraylist...suppose initial is 100 , if i add 101 element what is the size...