What does indexof return in java?
What are the main features of java?
Why do we need hashmap in java?
What is a arraylist in java?
What is an immutable object? How do you create one in java?
How do singleton patterns work?
Can a private method of a superclass be declared within a subclass?
What are event-delegation model and event-inheritance model? Which is best?
Which package is always imported by default?
What is the this keyword?
What is the difference between jsp and servlet?
What is the meaning of I ++ in java?
What is Classloader in Java?