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Core Java (J2SE) Java Development

Core Java (J2SE)

Core Java is the essential starting point for every Java career. This course covers syntax, object-oriented programming, collections, exception handling and file work — the fundamentals every Java job assumes you know. Taught one-on-one with real coding exercises, it prepares you for advanced Java, Android or backend paths.

Duration
1.5 mths
Format
Live 1-on-1
Level
Professional
Certificate
Osian NSDC
Overview

What this course is about

Build a solid Java foundation with Core Java J2SE classes that take you from syntax to reliable object oriented programs. Your teacher covers the JDK setup, variables, operators, control flow, methods, arrays, strings, classes, objects, constructors, inheritance and interfaces. You will use Eclipse, IntelliJ IDEA or a suitable Java editor, compile with the JDK and learn to interpret errors rather than memorise one IDE's buttons. This route suits students looking for Java classes for BCA or BTech study.

The course develops everyday J2SE skills through collections, generics, exception handling, packages, file input and output, and basic multithreading concepts. You will use ArrayList, HashMap and related collections to model data, then practise JDBC basics to understand how Java communicates with a relational database. A guided project such as a library manager, fee tracker or inventory console application helps connect OOP, validation, persistence and clean program structure.

One-on-one online learning is useful when you need a slower explanation of references, constructors, collections or JDBC setup. Timings can fit school, college, work or home responsibilities from 7 AM to 9 PM or on weekends. On completion, you receive a certificate and placement support with resume help, mock interviews and referrals. Core Java stays focused on the J2SE foundation, while Advanced Java on the site moves into web technologies and enterprise application patterns.

By the end

What you’ll be able to do

  • Write Java programs with methods, arrays, strings and control flow
  • Design classes using constructors, inheritance, interfaces and encapsulation
  • Use collections, generics and exceptions to manage application data safely
  • Read and write files with packages and organised J2SE project structure
  • Connect a Java program to a relational database using JDBC basics
  • Build and explain a console-based Core Java application
Syllabus

How the course flows

  1. 1
    Core Syntax & OOPWeek 1

    Classes, objects, inheritance and the object-oriented mindset.

  2. 2
    Collections & GenericsWeek 2

    Lists, maps, sets and writing type-safe reusable code.

  3. 3
    Exceptions & FilesWeek 3

    Robust error handling and reading/writing data.

  4. 4
    JDBC & DatabasesWeek 4

    Connecting Java to a database and running real queries.

  5. 5
    Build a ProjectWeeks 5–6

    Putting it together into a working application.

Toolkit

Tools you’ll use

  • Java (JDK)
  • IntelliJ IDEA / Eclipse
  • Maven
  • MySQL
  • Git
Audience

Who this course is for

  • Students after 12th beginning Java for college or independent practice
  • BCA, BTech, MCA and BSc CS learners preparing for J2SE subjects
  • Job seekers revising Core Java concepts for fresher interviews
  • Programmers from C or C++ who want a managed object oriented language
  • Working professionals refreshing Java fundamentals before advanced frameworks
Where it leads

Roles this opens up

  • Core Java Trainee

    Apply J2SE syntax, OOP and collections in supervised programming and support tasks.

  • Junior Java Developer

    Contribute to small Java modules using clear classes, exception handling and data access basics.

  • Application Support Trainee

    Read Java code, reproduce issues and use logs or debugging steps to support application teams.

Questions

Before you enrol

Yes, the course starts with JDK setup, variables and control flow before moving to object oriented programming. Regular practice is important, but previous Java experience is not required.

The teacher will use a current supported JDK and can demonstrate Eclipse or IntelliJ IDEA based on your system. You will also learn enough command-line compilation to understand what the IDE is doing.

A standard laptop with a supported JDK, IDE and stable internet is sufficient for the exercises. Core Java console and JDBC practice does not need specialised hardware.

You practise OOP, collections, exceptions, files and JDBC concepts that commonly appear in Java coursework, practicals and viva questions. The teacher also uses small coding problems so you can explain the reasoning behind an answer.

You can build a library manager, fee tracker or inventory console application using classes, collections, validation and JDBC basics. The scope remains focused on J2SE rather than a large web framework.

Core Java focuses on J2SE programming foundations and basic database connectivity. Advanced Java moves into web and enterprise technologies, while Comprehensive Java combines both stages into one broader learning path.