Why spring singleton is not thread safe?
Whats the difference between notify() and notifyall()?
what really hapens when a object is created using new operator? 1.is it allocates memory to all variables and methods in the class with reference to that object?
Can we declare a class as abstract without having any abstract method?
how to know the total memory occupied by the objects in the ArrayList(Array list may contain duplicate objects)
What is difference between hashset and hashmap?
Can an object subclass another object?
Can a singleton class be inherited?
How does queue work in java?
What are different types of states exist for a thread?
What is the protocol is used in type4 driver?
What is a key in java?
Is there any tag in htm to upload and download files?