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Java

Java

Welcome!

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Java is a high-level, object-oriented programming language designed for portability, scalability, and efficiency. Developed by Sun Microsystems in the mid-1990s, it operates on the principle of "write once, run anywhere" (WORA), meaning Java code can run on any device equipped with a Java Virtual Machine (JVM). Java is widely used for building enterprise applications, mobile applications (especially Android), web services, and large-scale systems. Its extensive libraries, robust security features, and strong community support make it a popular choice among developers for creating cross-platform applications and software solutions.


Prerequisites

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To learn Java as a beginner, you should have a basic understanding of programming concepts such as variables, data types, loops, and functions. Familiarity with using a computer and navigating file systems is essential. Basic problem-solving skills will help you write and debug code effectively. While Java is designed to be beginner-friendly, exposure to any programming language can provide a helpful foundation and boost your confidence in learning Java concepts.


Learning Objectives

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The learning objectives of Core Java include mastering the fundamental concepts of object-oriented programming, such as classes, objects, inheritance, and polymorphism. Students will aim to understand Java syntax, data types, and control structures. Additionally, they will learn about exception handling, file I/O, and collections framework. The course will also cover multithreading and Java application development, equipping learners with the skills needed to create robust and efficient Java applications.

 

 

Course Overview

  • History & Evolution of Java
  • Features & Applications of Java
  • JVM, JRE, JDK Overview
  • Java Program Structure
  • Writing, Compiling, and Running a Simple Java Program
  • Introduction to Java Development Tools

  • Data Types, Variables, and Constants
  • Java Operators
  • Type Casting and Type Conversion
  • String Handling: String, StringBuffer, StringBuilder
  • Arrays: Single and Multi-dimensional Arrays
  • Command Line Arguments
  • Java Naming Conventions and Syntax

  • Conditional Statements: if-else, switch-case
  • Looping Constructs: for, while, do-while
  • Enhanced for loop
  • break, continue, and return Keywords
  • Nested Loops

  • Introduction to OOP: Principles (Encapsulation, Inheritance, Polymorphism, Abstraction)
  • Classes and Objects: Defining Attributes & Methods
  • Constructors: Default, Parameterized, Anonymous Blocks
  • Method Overloading, this Keyword
  • Inheritance: Single, Multilevel, Hierarchical
  • Usage of super Keyword
  • Method Overriding and Runtime Polymorphism
  • Abstract Classes, Interfaces, and Multiple Inheritance
  • final Keyword
  • Package Creation and Access Modifiers (public, private, protected, default)
  • Implementing Has-A (Composition) Relationship
  • Generic Class
  • Lambda Expression
  • Joda Time
  • Annotation, Assertion

  • Types of Exceptions (Checked & Unchecked)
  • try-catch Block
  • finally Block and its Importance
  • throw and throws Keywords
  • Custom Exceptions
  • Exception Hierarchy and Common Exceptions

  • Introduction to Streams (Byte and Character Streams)
  • File Input/Output with FileReader, FileWriter, BufferedReader, BufferedWriter
  • Serialization and Deserialization
  • Handling Files with the File Class
  • Use of the Scanner Class for File Input
  • transient Keyword

  • Introduction to Threads and Multitasking
  • Thread Class vs Runnable Interface
  • Thread Life Cycle
  • Synchronization and Inter-thread Communication
  • Deadlock, Thread Priority, and Yield
  • Daemon Threads and Interrupting Threads

  • Introduction to Collections: Importance & Use
  • List Interface: ArrayList, LinkedList
  • Set Interface: HashSet, TreeSet
  • Map Interface: HashMap, TreeMap
  • Iterators: Iterator, ListIterator
  • Comparable and Comparator Interfaces
  • Searching and Sorting Collections
  • equals() and hashCode() Methods
  • Enumeration vs Iterator

  • JDBC Overview and Driver Types
  • Connecting Java to Databases (MySQL, etc.)
  • Performing CRUD Operations using Statement and PreparedStatement
  • Batch Processing
  • CallableStatement and Stored Procedures
  • Working with ResultSetMetaData and DatabaseMetaData

  • Working with Java Standard Libraries
  • Utilizing Predefined Classes (Math, Random, Scanner, etc.)
  • Understanding Java Documentation (Javadoc)
  • Introduction to Utility Classes (Date, Calendar, Arrays, etc.)

  • Introduction to Design Patterns
  • Singleton Pattern
  • Factory Pattern
  • Strategy Pattern
  • Observer Pattern
  • Model-View-Controller (MVC) Pattern
  • Practical Implementation of Basic Design Patterns

  • Introduction to JUnit Framework
  • Writing Simple Unit Tests
  • Test Cases, Assertions, and Test Suites
  • Mocking Objects and Test Coverage
  • Best Practices for Unit Testing

  • Introduction to AWT and Swing
  • Creating Simple GUI Applications (JFrame, JButton, JLabel, JTextField)
  • Event Handling (ActionListener, MouseListener, etc.)
  • Layout Managers (FlowLayout, BorderLayout, GridLayout)
  • Building Forms and Handling User Input

Frequently Asked Questions (FAQs)

Beginners, students, and professionals aiming for careers in software, web, or mobile app development.

About 2.5 months for basics; 6-8 months for advanced topics like advance java and frameworks.

Careers include software engineer, Android developer, backend developer, cloud engineer, and big data engineer.

Companies like Google, Amazon, and banks use Java for secure, scalable backend systems.

Java is platform-independent, secure, scalable, and widely used in enterprise and Android development.

Java is versatile, secure, and has strong community support, making it great for building high-performance apps.

Java is used in web apps, Android apps, big data, cloud services, and financial systems.

Yes, frameworks like Spring Boot and JSP help build secure and scalable web apps.

Yes, Java can be used for AI and Data Science with libraries like "Deeplearning4j", "Weka", and "ND4J".

Yes, Java is a key language for Android app development.

Common frameworks include Spring, Hibernate, and Struts for simplifying development.

Java code is compiled into bytecode, which runs on the JVM, making it platform-independent.

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