Java: free course

A popular language for Android apps, banks, big business systems and university courses. Learn the syntax and object-oriented programming.

9 lessons · free · no account needed · code examples, practice questions and videos

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Lessons

1. 1 Java introduction: what Java is, where it's used, the JDK and JVM, your first program, syntax rules and input/output
2. 2 Variables, data types and operators in Java
3. 3 Conditions, loops and arrays in Java: if/else, switch, for, while, do-while, break/continue, arrays and 2D arrays
4. 4 Methods: parameters, return values and overloading
5. 5 Strings, arrays and ArrayLists
6. 6 Classes and objects (OOP) in Java: fields, constructors, methods, encapsulation, static members, toString and designing classes
7. 7 Inheritance, interfaces and polymorphism
8. 8 HashMap, collections and exception handling
9. 9 Java for Android and next steps: Android Studio, activities, layouts, events, Java vs Kotlin, Spring Boot and your learning path