Trail: Learning the Java Language
This trail covers the fundamentals of programming in the Java programming language.
Object-Oriented Programming Concepts teaches you the core concepts behind object-oriented programming: objects, messages, classes, and inheritance. This lesson ends by showing you how these concepts translate into code. Feel free to skip this lesson if you are already familiar with object-oriented programming.
Language Basics describes the traditional features of the language, including variables, arrays, data types, operators, and control flow.
Classes and Objects describes how to write the classes from which objects are created, and how to create and use the objects.
Annotations are a form of metadata and provide information for the compiler. This lesson describes where and how to use annotations in a program effectively.
Interfaces and Inheritance describes interfaceswhat they are, why you would want to write one, and how to write one. This section also describes the way in which you can derive one class from another. That is, how a subclass can inherit fields and methods from a superclass. You will learn that all classes are derived from the Object class, and how to modify the methods that a subclass inherits from superclasses.
Numbers and Strings This lesson describes how to use Number and String objects The lesson also shows you how to format data for output.
Generics are a powerful feature of the Java programming language. They improve the type safety of your code, making more of your bugs detectable at compile time.
Packages are a feature of the Java programming language that help you to organize and structure your classes and their relationships to one another.
Java Tutorial for Beginners
This java tutorial would help you learn Java like a pro. I have shared 1000+ tutorials on various topics of Java, including core java and advanced Java concepts along with several Java programming examples to help you understand better.
All the tutorials are provided in a easy to follow systematic manner. It is for everyone, whether you are a college student looking for learning Java programming for free, or a company employee looking for a particular code snippet while building an application in Java, this Java tutorial would definitely be useful for you. Happy learning!
Download Java
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Java Introduction
- Introduction to Java
- History of Java
- Features of Java
- C++ vs Java
- JDK vs JRE vs JVM
- Java Virtual Machine(JVM) Basics
- First Java Program
- Variables in Java
- Java Data Types
- Java TypeCasting
- Java Operators
Java Flow Control
Arrays in Java
Java OOPs
- OOPs Concepts
- Constructor in Java
- Java String
- Java StringBuffer
- Java StringBuilder
- Java Inheritance with example
- Method overloading in Java
- Method overriding in Java
- Method Overloading vs Method Overriding
- Polymorphism in Java
- Aggregation in Java
- Association in Java
Java Exception Handling
Collections Framework
Java References
Includes collection of guides on various java classes and methods with examples.
Java Programs
Additional Topics
- Java Varargs
- Java Scanner
- Java I/O
- Java Enum
- Java Annotations
- Java Regex
- Java Multithreading
- Java Serialization
- Java AWT Tutorial
- Java Swing Tutorial
- Java autoboxing and unboxing
- Java 8
- Java 9
What is Java?
Java is an object oriented programming language developed by Sun Microsystems in early 1990 by developers James Gosling, Mike Sheridan and Patrick Naughton.
In 1991 James Gosling and his friends formed a team called Green Team to further work on this project. The original idea was to develop this programming language for digital devices such as television, set-top box, remote etc. Later this idea was dropped and Java is developed for internet programming.
Why learn Java?
Java Programming language has several features which other programming languages don’t have. Java receives updates regularly which makes it more robust and future proof. Lots of new features are added on every Java release. There are several features of Java, some of them are:
- Platform independent: Java doesn’t depend on the operating system. For example, a program written on Mac OS can run on Windows and vice versa.
- Easy to learn: Syntax is easy and there are lot of tutorials available online including the one which you are currently reading.
- Performance: Java is significantly faster than other traditional interpreted programming languages. Compiled java code which is known as byte code is like a machine code, that allows a faster execution. Java uses Just in Time compiler which can execute the code on demand, this allows to execute only the method that is being called, which makes it faster and efficient.