Java Programming Course Overview

These flashcards cover key concepts and terminology related to the Java Programming course.

What are the main objectives of the Java Programming course?

To learn Java fundamentals, apply object-oriented principles, utilize exception handling, multithreading, JDBC, and design GUIs.

What is a class in Java?

A class is a blueprint from which objects are created, containing fields and methods.

How is an object created in Java?

An object is created using the new keyword, e.g., ClassName obj = new ClassName();.

What is a constructor in Java?

A constructor is a special method used to initialize objects, sharing its name with the class and having no return type.

What is the difference between a default constructor and a parameterized constructor?

A default constructor initializes fields with default values, while a parameterized constructor initializes fields with specific values.

What does constructor overloading allow you to do?

It allows you to have multiple constructors in a class with different parameter lists.

What is the purpose of the 'this' keyword in Java?

'this' refers to the current object of a class, helping to resolve conflicts between instance variables and parameters.

What is recursion in Java?

Recursion is a technique where a method calls itself to solve smaller instances of the same problem.

What is the significance of the String class in Java?

The String class is used to create and manipulate sequences of characters, and it is immutable.

What is garbage collection in Java?

Garbage collection reclaims memory occupied by objects no longer in use.

What are the types of inheritance in Java?

Single, Multilevel, Hierarchical, Multiple (via interfaces), and Hybrid inheritance.

What is polymorphism in Java?

Polymorphism is the ability of an object to take many forms, allowing methods to act differently based on the object that invokes them.

What distinguishes compile-time polymorphism from run-time polymorphism?

Compile-time polymorphism is achieved via method overloading, while run-time polymorphism is achieved via method overriding.

What is the purpose of the 'super' keyword in Java?

It is used to access methods and constructors of a parent class.

What is a finalize() method used for in Java?

The finalize() method is called by the garbage collector before an object is destroyed to perform cleanup operations.

What is access control in Java?

Access modifiers define the visibility of classes, methods, and fields within the code.