Object Oriented Programming in JAVA (OOPJ) — Winter 2023

Do as directed. 1) ---------------method is used to convert an ArrayList to an array. 2) ---------------method return size of stringbuffer constructor. 3) ---------------method is used to convert string to int type. 4) --------------- is a method which is work with garbage collection 5) ---------------keyowrd is used to allocate memory of an object. 6) What is the use of printStackTrace() method 7) What is the use of sleep() method

What is the loop? Explain different type of loop with example.

What is Java? Explain any four features of Java.

1) Explain Integer class with example. 2) Explain Class Loader in Java. 3) Explain work of JVM.

1) Why Java main () method is public, static and also has one argument? 2) Why Java is Platform Independent. 3) What is Boxing, Auto boxing and Unboxing?

Difference between static and instance variable with example.

Explain Constructor with Constructor and Method Overloading with Example.

If we are declaring variable, method, class as final. What will happen? Explain it.

Explain String, StringBuffer? Also explain its method.

Explain Polymorphism and Encapsulation with example.

What is an interface? How it is important in Java? Explain with example.

Explain Comparable and Comparator Interface.

What is an Exception? How to create your own exception? Explain with example.

What is Thread? How many ways thread can be created in java? Write down steps for creating thread.

Write a note: List, Set and Map Collection.

What is Generic class? How to create generic class and generic method.

What is Stream? Explain different types of stream classes.