Where to find a free course about Java ?

Name: Java
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Free online course Java

Duration of the online course: 22 hours and 17 minutes

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Build job-ready Java skills with a free online course: learn programming fundamentals, methods, arrays, OOP basics, and practical problem-solving—fast.

In this free course, learn about

Core Java programming basics: syntax, control flow, and problem-solving methodology
CS106A tooling/platform: Java with ACM libraries; using the IDE setup for Karel assignments
Variables in Java: type, name, and value; plus user input into numeric variables
Type casting concepts: explicit vs implicit conversions and when each is required
Writing good methods: parameters, naming, decomposition, and code readability
Strings in Java and common string-processing tasks (e.g., counting uppercase letters)
Memory fundamentals: bytes and how data is represented/stored in computer memory
Objects and references: what assignment means when setting one object equal to another
Arrays and 2D arrays (matrices): storing collections and tracking things like scores
Java interfaces and event-driven programming with GUI interactors (combo boxes, actions)
Working with images/graphics using ACM graphics classes (e.g., GImage file loading)
Program design via larger examples: NameSurfer and data visualization over time
High-level CS ideas beyond coding: computation patterns, networks, and social networks

About the free online course

Strengthen your programming foundations while learning Java in a practical, methodical way. This free online course is designed for learners who want more than syntax: you will develop the ability to think like a programmer, break problems into steps, and turn ideas into working programs. The lessons emphasize clear reasoning, disciplined debugging, and building solutions that are readable, reusable, and easy to improve over time.

Starting from core concepts such as variables, data types, input, and casting, you will gain confidence with the building blocks of the language and learn how small choices in design affect correctness and maintainability. As you progress, you will work with strings, control flow, and functions, then move into structured code with methods and parameters. You will also explore how computers represent information, which helps you understand what your code is doing under the hood and make better decisions when writing it.

The course then transitions into essential Java structures used in real projects: arrays, matrices, and working with collections of data. You will practice manipulating values, tracking results, and organizing information in ways that scale beyond single examples. You will also be introduced to object references and what it means when one object is set equal to another, an important concept for avoiding unexpected behavior in larger programs.

To connect fundamentals with real application development, you will encounter event-driven ideas and graphical components, building intuition for how interactive programs respond to user actions. Along the way, you will be exposed to interfaces and the role they play in designing flexible code. Exercises reinforce each step, helping you move from understanding concepts to applying them confidently.

Whether you are starting from scratch, transitioning from another language, or refreshing your computer science basics, this course offers a structured path to stronger Java skills and better problem-solving habits you can reuse in any programming context.

Course content

Video class: Lecture 1 | Programming Methodology (Stanford) 49m
Exercise: What programming language is used in the course CS 106a?
Video class: Lecture 2 | Programming Methodology (Stanford) 48m
Exercise: What is the primary programming platform used in the CS106A class?
Video class: Lecture 3 | Programming Methodology (Stanford) 50m
Exercise: _What should you use for the purpose of the Karel assignments?

Video class: Lecture 4 | Programming Methodology (Stanford) 48m
Exercise: _What was the first computing device made available around 4,000 years ago?
Video class: Lecture 5 | Programming Methodology (Stanford) 49m
Exercise: _What are the three things associated with a variable in Java?
Video class: Lecture 6 | Programming Methodology (Stanford) 45m
Exercise: _What is the function used to get input from the user and assign it to an integer variable in Java?

Video class: Lecture 7 | Programming Methodology (Stanford) 51m
Exercise: _What is the difference between explicit and implicit casting in Java?
Video class: Lecture 8 | Programming Methodology (Stanford) 48m
Exercise: _What is the reason for using methods with parameters and good names in Java?
Video class: Lecture 9 | Programming Methodology (Stanford) 52m
Exercise: _What is a string in Java?

Video class: Lecture 10 | Programming Methodology (Stanford) 46m
Exercise: What is the constant value of units required for all students to graduate in the class discussed?
Video class: Lecture 11 | Programming Methodology (Stanford) 49m
Exercise: Where is the default location for loading image files in a GImage object in a program discussed in the transcript?
Video class: Lecture 12 | Programming Methodology (Stanford) 49m
Exercise: _What is enumeration in Java?

Video class: Lecture 13 | Programming Methodology (Stanford) 46m
Exercise: _What is the function countUpperCase() used for?
Video class: Lecture 14 | Programming Methodology (Stanford) 46m
Exercise: _What is a byte in computer memory?
Video class: Lecture 15 | Programming Methodology (Stanford) 48m
Exercise: What happens when you set an object equal to another object in programming?

Video class: Lecture 16 | Programming Methodology (Stanford) 49m
Exercise: _What is an array in Java?
Video class: Lecture 17 | Programming Methodology (Stanford) 50m
Exercise: _What is a matrix in Java?
Video class: Lecture 18 | Programming Methodology (Stanford) 46m
Exercise: What type of array is used to track student scores?

Video class: Lecture 19 | Programming Methodology (Stanford) 49m
Exercise: _What is an interface in Java?
Video class: Lecture 20 | Programming Methodology (Stanford) 44m
Exercise: _What is a combo box?
Video class: Lecture 21 | Programming Methodology (Stanford) 47m
Exercise: _What method do you need to call in order to get the name of the interactor that caused the action performed method to be called?

Video class: Lecture 22 | Programming Methodology (Stanford) 45m
Exercise: _What is the purpose of the program named "Name Surfer"?
Video class: Lecture 23 | Programming Methodology (Stanford) 51m
Exercise: What concept is the main focus of the lecture before Thanksgiving?
Video class: Lecture 24 | Programming Methodology (Stanford) 47m
Exercise: _What is one of the things that computers do a lot of, according to the presentation?

Video class: Lecture 25 | Programming Methodology (Stanford) 47m
Exercise: _What is a social network in the context of the lecture?
Video class: Lecture 26 | Programming Methodology (Stanford) 42m
Exercise: _What is the relationship between the ACM libraries and standard Java?
Video class: Lecture 27 | Programming Methodology (Stanford) 41m
Exercise: What is emphasized as the main focus of computer science beyond programming?
Video class: Lecture 28 | Programming Methodology (Stanford) 41m
Exercise: What type of graphics contest categories were presented in the class?

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