What are finally and finalize in Java?

Which class is a superclass of all classes?

Can you tell the difference between equals() method and equality operator (==) in Java?

Write a Java Program to check if any number is a magic number or not.

What are the differences between HashMap and HashTable in Java?

What are the differences between JVM, JRE and JDK in Java?

Explain the use of final keyword in variable, method and class.

Tell us something about JIT compiler.

How to remove Whitespaces from String in java?

Check if a List of integers contains only odd numbers?

Java Program to check if a vowel is present in the string?

How to swap two numbers without using a third variable?