Java Programming Tutorials — Source Code Examples, Arrays, GUI and Core Java Concepts

Java remains one of the most widely used programming languages in the world — taught in universities, used in enterprise systems, and powering billions of devices through the Java Virtual Machine. Its write-once-run-anywhere philosophy, strong object-oriented foundation and rich standard library make it a first-choice language for students learning programming fundamentals and professionals building scalable enterprise applications.

MYCPLUS has been publishing Java programming tutorials and source code examples since 2004. This section covers Java from the ground up — starting with core language fundamentals and progressing through practical topics including arrays and data structures, graphical user interface development with Java Swing and AWT, object-oriented design patterns and real-world application examples you can compile and run immediately.

With over 45 articles covering beginner through advanced Java concepts, you will find clear explanations of Java syntax and core programming principles, practical source code examples for common programming challenges, and hands-on GUI tutorials that show how to build interactive Java applications from scratch. Whether you are a student working through your first Java course, a developer brushing up on fundamentals, or a programmer transitioning from C++ or Python — this section gives you the practical Java resources you need.

What You’ll Learn:

Core Java fundamentals — variables, data types, control flow, methods, constructors and the foundational Java programming model explained with practical examples
Arrays and data structures in Java — single and multi-dimensional arrays, ArrayList, LinkedList, stacks, queues and practical data structure implementations in Java
Object-oriented programming in Java — classes, inheritance, polymorphism, interfaces, abstract classes and encapsulation with real-world Java source code examples
Java GUI development — building graphical user interfaces with Java Swing and AWT, event handling, layout managers, buttons, forms and interactive application design
Java collections and generics — working with the Java Collections Framework, iterators, generics, Maps and Sets for efficient data management in Java applications
Practical Java source code — ready-to-compile Java programs covering algorithms, sorting, searching, file handling and common programming challenges for hands-on learning

Why MYCPLUS: Trusted by Java developers and students since 2004 — every tutorial includes working source code you can compile and run immediately, with clear explanations designed for real-world Java programming skills.

Java Chat Program for Real-Time Communication

This is a Java Application program that supports two way real time chatting or communication between two users over the Internet. The program can be run either as a standalone application or as a client-server application.

PostFix expression evaluator – Java

This program evaluates postfix expressions entered by the user. The expressions can use non-negative real nubmers and the operators +,

Interactive Java Color Palette: Select and Display HEX Color Values

This Java code defines a simple graphical user interface (GUI) component called RainbowPalette. This component represents a color palette that features a spectrum of hues. Users can interact with the palette by clicking on different colors, and the selected color’s HEX value is displayed in a text box below the palette.

Java Source Code