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Programming · Core Java and application development

Java Programming

Learn Core Java from fundamentals to practical application development, including object-oriented programming, collections, generics, exceptions, multithreading, streams, JDBC, MySQL, and testing.

Move from Java syntax and OOP principles to a complete Employee Management System with CRUD operations, validation, database persistence, and a professional project structure.

Beginner to Advanced 12 Weeks 12 Modules Online / Classroom Employee Management System Project
Explore curriculum → View capstone project

Course overview

Java is a widely used, platform-independent programming language for building desktop applications, backend services, Android applications, enterprise systems, and database-driven software.

This course begins with Java syntax, variables, operators, control flow, arrays, methods, and object-oriented programming. It then covers collections, generics, exceptions, file handling, multithreading, lambdas, streams, JDBC, MySQL, testing, and debugging.

The proposed capstone is an Employee Management System. It covers application architecture, employee CRUD operations, input validation, search, JDBC database persistence, and clean-code practices.

Strong Java development requires more than knowing syntax. It includes object-oriented design, clear validation, useful error handling, maintainable code, testing, and safe database access.

Prerequisites

This course is designed for learners with basic computer knowledge. Prior programming experience is helpful but not required.

  • Basic computer knowledge.
  • Comfort using files, folders, and a keyboard.
  • Basic logical thinking and problem-solving interest.
  • Basic command-line familiarity is helpful.
  • No prior Java experience is required.
  • Basic SQL awareness is helpful for the database modules.

Readiness activity

Write the steps to calculate the average of five numbers. Identify the inputs, calculation, condition, and expected output.

Who can explore this course?

Beginners

Learn programming

Build a strong foundation in Java syntax, logic, and OOP.

Students

Prepare for academics

Learn Java concepts commonly used in coursework and projects.

Career changers

Enter software development

Build practical Java skills for backend and application roles.

Developers

Strengthen Core Java

Review OOP, collections, exceptions, threads, JDBC, and modern Java features.

What you will learn

  • Explain JDK, JRE, JVM, and Java program execution.
  • Write Java programs using variables, operators, and control flow.
  • Use arrays, methods, and reusable program logic.
  • Apply object-oriented programming principles.
  • Use classes, objects, constructors, inheritance, and interfaces.
  • Work with strings, wrapper classes, and formatting.
  • Use collections, generics, iterators, and streams.
  • Handle exceptions and create custom exception types.
  • Read and write files using Java I/O concepts.
  • Use threads, synchronization, and executor concepts.
  • Connect Java applications to MySQL using JDBC.
  • Apply clean-code, debugging, and unit-testing practices.

Curriculum outline

The twelve-module outline moves from Java fundamentals to a complete Employee Management System. Exact Java version, IDE, database, and project requirements should be confirmed before delivery.

01

Java fundamentals

Understand the Java platform and write your first Java program.

  • JDK, JRE, and JVM.
  • Installing Java and setting up an IDE.
  • Java syntax and program structure.
  • Variables and data types.
  • Console input and output.
  • Comments and code conventions.

Practice: Write a Java program that accepts a user’s name and displays a personalized greeting.

02

Operators and control flow

Use operators, conditions, loops, and arrays to solve practical problems.

  • Arithmetic, relational, and logical operators.
  • If, else-if, switch, and ternary statements.
  • For, while, and do-while loops.
  • Break and continue statements.
  • Single-dimensional and multidimensional arrays.
  • Common programming patterns.

Practice: Create a program that finds the largest number in an array and counts even values.

03

Methods and OOP foundations

Organize code using methods and understand classes, objects, and constructors.

  • Method declaration and return types.
  • Parameters, arguments, and method overloading.
  • Classes and objects.
  • Fields, methods, and constructors.
  • this keyword and static members.
  • Object lifecycle concepts.

Practice: Create a Student class with fields, constructor, methods, and object creation.

04

Object-oriented programming

Apply the four main OOP principles to design reusable and maintainable Java classes.

  • Encapsulation and access modifiers.
  • Getters, setters, and data validation.
  • Inheritance and method overriding.
  • Abstraction and abstract classes.
  • Interfaces and multiple inheritance of type.
  • Polymorphism and dynamic method dispatch.

Practice: Design an Employee class hierarchy using encapsulation, inheritance, and polymorphism.

05

Strings and wrapper classes

Work effectively with text, numeric wrappers, parsing, and formatting.

  • String creation and immutability.
  • Common String methods.
  • StringBuilder and StringBuffer.
  • Wrapper classes and autoboxing.
  • Parsing and type conversion.
  • Formatting output.

Practice: Validate a user-entered email format and format a numeric value for display.

06

Collections framework

Store, search, sort, and manage groups of objects using Java collections.

  • Collection hierarchy and interfaces.
  • List, ArrayList, and LinkedList.
  • Set, HashSet, and TreeSet.
  • Map, HashMap, and TreeMap.
  • Queue and PriorityQueue.
  • Iterators and collection selection.

Practice: Store employee records in a list and search, sort, and filter them by name or salary.

07

Generics and exception handling

Write type-safe code and handle runtime problems gracefully.

  • Generic classes and methods.
  • Bounded type parameters.
  • Checked and unchecked exceptions.
  • try, catch, finally, and try-with-resources.
  • Custom exception classes.
  • Validation and error messages.

Practice: Create a custom InvalidEmployeeException and handle invalid input safely.

08

Files and streams

Read, write, and manage data using Java file-handling and stream concepts.

  • File and Path concepts.
  • Byte streams and character streams.
  • Buffered reading and writing.
  • Serialization and deserialization concepts.
  • File validation and error handling.
  • Working with CSV-like structured data.

Practice: Save employee records to a file and read them back into a Java application.

09

Multithreading and modern Java

Understand concurrent programming and use modern Java features for concise data processing.

  • Threads and Runnable.
  • Thread lifecycle and synchronization.
  • ExecutorService and thread pools.
  • Lambda expressions.
  • Functional interfaces.
  • Stream API and optional.

Practice: Use streams to filter, sort, and summarize employee data.

09

JDBC and MySQL

Connect Java applications to relational databases and perform safe CRUD operations.

  • JDBC architecture and drivers.
  • Database connections and configuration.
  • SQL basics for Java developers.
  • Statement and PreparedStatement.
  • ResultSet and CRUD operations.
  • Transactions and resource management.

Practice: Create an employee table in MySQL and implement insert, read, update, and delete operations using JDBC.

11

Testing, debugging, and clean code

Improve code quality through systematic testing, debugging, and maintainable design.

  • Debugging workflow and breakpoints.
  • Reading stack traces and error messages.
  • Unit-testing concepts.
  • JUnit test structure and assertions.
  • Clean-code and naming practices.
  • Code review and refactoring basics.

Practice: Write unit tests for employee validation and salary calculation logic.

12

Capstone delivery

Complete the Employee Management System and prepare a professional Java project demonstration.

  • Define application purpose and user roles.
  • Design classes, packages, and database tables.
  • Implement CRUD operations with JDBC.
  • Add validation and custom exceptions.
  • Use collections and streams for data processing.
  • Write unit tests and document the project.
  • Prepare a final demonstration and README.

Practice: Submit a complete Employee Management System with source code, database script, README, and test results.

Practical exercise ideas

Complete these smaller activities before assembling the final Employee Management System project.

Java basics

Calculator program

Build a console calculator using methods, conditions, loops, and input validation.

OOP

Bank account class

Create a BankAccount class with encapsulation, deposit, withdrawal, and validation.

Collections

Student record manager

Store student objects in a collection and implement search, sort, and filtering.

Exceptions

Input validation

Validate user input and handle invalid values using custom exceptions.

Streams

Data analysis

Use streams to filter, group, sort, and summarize a collection of records.

JDBC

Database CRUD

Connect to MySQL and perform insert, read, update, and delete operations safely.

Suggested twelve-week learning plan

This is an illustrative learning sequence. Confirm the academy's official timetable, Java version, IDE, MySQL setup, and assessment requirements before publishing.

Weekly focus and practical milestones
Week Focus Suggested milestone
01 Java fundamentals Write and run a basic Java console program.
02 Operators and control flow Build a calculator or number-analysis program.
03 Methods and OOP foundations Create classes, objects, and constructors.
04 OOP concepts Design an inheritance-based class hierarchy.
05 Strings and wrapper classes Validate and format user input.
06 Collections framework Manage records using List, Set, and Map.
07 Generics and exceptions Add validation and custom exception handling.
08 Files and streams Save and load application data from files.
09 Multithreading and modern Java Use lambdas and streams for data processing.
10 JDBC and MySQL Implement database CRUD operations.
11 Testing and debugging Write unit tests and fix application issues.
12 Capstone presentation Submit and present the Employee Management System.
Build a complete database-driven Java application

Capstone project

Employee Management System

Develop a Java application for managing employee records. The application should support employee CRUD operations, search, validation, reporting, and database persistence using JDBC and MySQL.

Core project requirements

  • Define employee fields such as ID, name, email, department, role, and salary.
  • Create a MySQL database and employee table.
  • Design Java classes using OOP principles.
  • Implement add, view, update, delete, and search operations.
  • Use JDBC PreparedStatement for safe database access.
  • Validate employee data before saving or updating.
  • Use custom exceptions for invalid or missing data.
  • Use collections and streams for listing, filtering, and sorting.
  • Implement transactions where multiple database changes are required.
  • Close database resources properly using try-with-resources.
  • Write unit tests for validation and business logic.
  • Provide a README with setup, database, and execution instructions.

Quality requirements

  • Use meaningful class, method, variable, and package names.
  • Keep user interface, service, and database logic separated.
  • Use constants or configuration for database credentials.
  • Do not hard-code passwords or expose database secrets.
  • Use PreparedStatement to reduce SQL-injection risk.
  • Handle SQL and input errors without exposing sensitive details.
  • Use meaningful error messages and validation feedback.
  • Use Git for version control and maintain a clear commit history.
  • Use only authorized sample data and avoid real personal data.
  • Document assumptions, limitations, and future improvements.

A reliable Java application separates concerns: user input, business rules, data validation, and database access should not all be placed in one class.

Suggested project structure

Keep models, services, database access, utilities, and tests separate for maintainability.

employee-management-system/
├── src/
│   ├── main/java/com/example/ems/
│   │   ├── model/
│   │   │   └── Employee.java
│   │   ├── repository/
│   │   │   └── EmployeeRepository.java
│   │   ├── service/
│   │   │   └── EmployeeService.java
│   │   ├── util/
│   │   │   ├── DatabaseConnection.java
│   │   │   └── InputValidator.java
│   │   └── Main.java
│   └── test/java/com/example/ems/
├── resources/
│   └── database.sql
├── pom.xml
├── README.md
└── .gitignore

Do not commit database passwords, private credentials, production data, or confidential employee information to a public repository.

Java application workflow

Java applications are iterative. User feedback, validation errors, database issues, and testing results may require changes to models, services, or database queries.

Requirements

Define features

Identify user roles, data fields, operations, and validation rules.

Design

Model the domain

Create classes, relationships, packages, and database tables.

Develop

Implement logic

Build models, services, validation, and database access methods.

Test

Verify behavior

Test normal cases, invalid input, edge cases, and database operations.

Debug

Investigate issues

Use stack traces, breakpoints, logs, and controlled tests to identify problems.

Document

Prepare delivery

Add README, setup instructions, database script, and project documentation.

JDBC uses PreparedStatement to execute parameterized SQL queries, which helps separate SQL logic from user-supplied values.

Tools and technologies

The exact Java version, IDE, database, and build tool may vary by delivery. The proposed toolkit focuses on Core Java and database-driven application development.

  • Java
  • JDK
  • IntelliJ IDEA
  • Visual Studio Code
  • Maven
  • MySQL
  • JDBC
  • JUnit concepts
  • Git
  • GitHub

Supporting concepts

  • JDK, JRE, JVM, and Java bytecode.
  • Classes, objects, interfaces, and packages.
  • Collections, generics, iterators, and streams.
  • Exceptions, validation, and resource management.
  • Threads, executors, and synchronization.
  • JDBC connections, prepared statements, and transactions.

Learning outcomes

By completing the proposed lessons and exercises, aim to demonstrate the following abilities:

  • Write clear and maintainable Java programs.
  • Apply object-oriented programming principles.
  • Use collections, generics, and streams effectively.
  • Handle exceptions and validate user input.
  • Read and write files using Java I/O concepts.
  • Use threads and modern Java features appropriately.
  • Connect Java applications to MySQL using JDBC.
  • Perform safe CRUD operations and manage transactions.
  • Test, debug, and document Java applications.
  • Build a complete Employee Management System project.

These are learning objectives, not guarantees of employment, certification, placement, or a specific developer role. Progress depends on practice, problem-solving, code quality, and continued learning.

Related career interests

Illustrative directions for continued learning, not job or placement guarantees.

  • Java Developer
  • Backend Developer
  • Software Engineer
  • Application Support Developer
  • Java Trainee
  • Associate Engineer
  • Technology Trainee

Portfolio presentation ideas

  • Explain the application purpose and user operations.
  • Show class design and OOP principles used.
  • Present validation and exception-handling logic.
  • Demonstrate CRUD operations with MySQL.
  • Explain PreparedStatement and transaction usage.
  • Show unit tests, debugging, and project documentation.

Frequently asked questions

Who is this course for?

It is suitable for beginners, students, career changers, and developers who want to learn Core Java and build database-driven applications.

Do I need programming experience?

No. Prior programming experience is helpful but not required. The course begins with Java fundamentals and progresses step by step.

Will the course cover OOP?

Yes. It covers classes, objects, constructors, encapsulation, inheritance, abstraction, interfaces, and polymorphism.

Will the course cover collections and streams?

Yes. It covers List, Set, Map, Queue, generics, iterators, lambdas, functional interfaces, and the Stream API.

Will the course cover JDBC?

Yes. It covers JDBC architecture, database connections, PreparedStatement, ResultSet, CRUD operations, and transactions.

What is the capstone project?

The proposed capstone is an Employee Management System covering Java OOP, collections, validation, exceptions, JDBC, MySQL, and CRUD operations.

Do I need MySQL installed?

MySQL is recommended for the database modules and capstone project. Confirm the academy's required database version, setup, and sample-data instructions before enrollment.

Which IDE is used?

The proposed toolkit includes IntelliJ IDEA and Visual Studio Code. Confirm the IDE selected for the delivered course.

How long is the course?

The supplied course information proposes a duration of twelve weeks. Confirm the academy's official schedule, tools, database setup, and assessment requirements.

Does this course guarantee a job?

No. The course can support practical learning and portfolio development, but it does not guarantee employment, placement, certification, or salary.

How do I enroll?

This page is a frontend course-information demonstration. Enrollment, payment, scheduling, and admission workflows are not implemented here.

Build reliable Java applications

Build your Employee Management System

Study Core Java, OOP, collections, exceptions, multithreading, streams, JDBC, MySQL, testing, and application architecture through a practical portfolio project.

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