Learn Java In 30 Days : Study Plan

Java is an object-oriented, general-purpose and high demand programming language. It is a versatile, widely used programming language particularly suitable for enterprise-level applications, Android mobile development, and large-scale systems.

For these reasons learning Java can open doors to countless career opportunities in software development. In this article I will show you how to learn Java in just 30 days.

30 Days Java Study Plan#

Below is a simple, structured weekly plan to help you learn Core Java in just 30 days.

Week 1 : Java Basics#

Before diving into advanced topics, build a strong foundation by learning Java basics like variables, data types, operators, and control structures. Practice writing small programs to apply these concepts and improve your confidence.

Here is the list of concepts you need to cover in Week 1.

1. Introduction to Java & its Features
2. Setting up Java Development Kit (JDK)
3. Understanding Java Program Structure
4. Writing your first Hello World Program
5. Data Types and Variables
6. Operators (Arithmetic, Logical, Relational)
7. Conditional Statements (if-else, switch)
8. Loops (for, while, do-while)

Week 2 : Object-Oriented Programming (OOP)#

Java is an object-oriented language, so mastering OOP concepts is crucial. So after learning Java basics learn about classes, objects, inheritance, polymorphism, and encapsulation. Practice implementing these concepts in your code to solidify your understanding.

Here is the list of concepts you need to cover in Week 2.

1. Introduction to Classes and Objects
2. Understanding Methods and Constructors
3. OOP Concepts: Encapsulation, Inheritance, Polymorphism, Abstraction
4. this keyword and Method Overloading
5. super keyword and Method Overriding
6. Access Modifiers (public, private, protected, default)

Week 3 : Intermediate Java Concepts#

After learning OOP concepts, the next step is to explore arrays, strings, exception handling, and collections. These concepts are essential for building real-world Java applications. Practice working with arrays to store data, handle errors using try-catch blocks, and use collections to manage groups of objects.

Here is the list of concepts you need to cover in Week 3.

1. Arrays (Single & Multi-dimensional)
2. String Handling & String Methods
3. Exception Handling (try-catch-finally)
4. Custom Exceptions
5. Wrapper Classes & Autoboxing
6. Java Packages and Importing Classes
7. Java Collection Framework (List, Set, Map)

Week 4 : Advance Java Concepts#

Once you are confident with intermediate concepts, start learning advanced Java features like file handling, multithreading, and JDBC for database connectivity. In this week you will also explore Java 8 features like lambda expressions and streams.

Here is the list of concepts you need to cover in Week 4.

1. Introduction to File Handling (FileReader, FileWriter)
2. Basic Multithreading Concepts
3. Lambda Expressions and Functional Interfaces (Java 8 Features)
4. Stream API Basics for Data Processing
5. Introduction to JDBC for Database Connectivity

Resources#

1. Java Mastery by Anuj Bhaiya : https://www.youtube.com/playlist?list=PLUcsbZa0qzu18zPz3EatehQJ5K1jP4IO2
2. Complete Java in one Video : https://www.youtube.com/watch?v=NNLoi8QqzaY

Conclusion#

In this article, i have mentioned a structured 30-day study plan to master Java. By following this approach you can build a strong Java foundation and be ready for real-world software development.