Why hashmap is used in java?
What are different types of access modifiers?
Is java a virus?
Explain about interthread communication and how it takes place in java?
What are the different types of multitasking?
Is vector synchronized in java?
how to identify duplicate values in arraylist
How do you generate random numbers in java?
Differentiate between a class and an object.
What do you mean by constructor?
Explain the importance of import keyword in java?
Does a class inherit the constructor of its super class?if it does, how can you hide that constructor? if it doesnot how can you call it from the sub class?
Do I need java on my computer?