Can list contain null in java?
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How to convert string to char and vice versa?
What is a variable and constant?
Difference between final and effectively final ? Why is effectively final even required ?
Give few difference between constructor and method?
What is the purpose of using java.lang.class class?
How many times garbage collector will invoke an object?s finalize() method?
what is difference between prepare stetement and callable starement with example?
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Suppose there is an Online shopping cart application having different objects like Cart, SelectionItem, Billing, COnfiguration, Authentication, Authorization, PersonalDetails etc. Out of this which one can be made a singleton pattern and why?
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How define set in java?