Java course 2025: Java course: Java programming at professional environments (English Edition)

### Summary
This comprehensive Java course spans foundational to advanced topics, starting from Java’s history and virtual machine architecture to core language features, API functionalities, and best practices in object-oriented design, exception handling, and modern Java constructs like lambdas. It meticulously covers Java's evolution, installation, class structures, variable types, operators, control statements, collections, date/time API, and method design, building a robust understanding of Java programming.

Beginning with Java’s origin in the 1990s, the course highlights its hallmark philosophy of “Write Once, Run Anywhere” enabled by the Java Virtual Machine (JVM), which executes platform-independent bytecode. The Java language itself is introduced as strongly object-oriented with essential features such as primitives, references, classes, methods, and packages. Detailed explanations cover development setup (JDK and Eclipse IDE) and the anatomy of Java classes—including properties, methods, constructors, initialization blocks, and the main method as the program entry point. It emphasizes encapsulation, variable scopes, and distinctions between primitive data and reference types.

The course progresses to Java operators and control flow constructs like if-else, loops (while, do-while, for, for-each), switch, and advanced controls such as nested loops, labels, breaks, and continues. It explains complex topics like operator precedence, unary vs. binary operators, compound operators, casting, and numerical promotions.

Java APIs, especially the String and StringBuilder classes, are explored thoroughly, stressing immutability and memory efficiency. Collection frameworks are covered with focus on arrays, ArrayLists, generics, autoboxing, and conversions. Handling dates and times via the modern java.time API replaces older, cumbersome classes, with detailed creation, manipulation, formatting, and parsing illustrations.

Method design and encapsulation occupy a significant portion, explaining access modifiers (public, private, protected, default), method headers, overloading, varargs, passing parameters by value, and static members. The course promotes best practices like builder chaining, initialization order, immutability, and API usage patterns.

Advanced object-oriented principles including inheritance, abstract classes, interfaces, and polymorphism are extensively addressed. The course differentiates method overriding, hiding, and overloading, clarifies rules for access, exceptions, and visibility, and demystifies method resolution at runtime. Interfaces’ modern features like default and static methods are examined along with multiple inheritance challenges resolved by interfaces.

Finally, exception handling is detailed, from basics of try-catch-finally blocks, checked vs. unchecked exceptions, exception propagation rules, catching multiple exceptions, re-throwing, and best practices in error handling, wrapping up with how Java fosters robust, maintainable code through disciplined error management.

Overall, this course provides in-depth, stepwise knowledge to build expertise from Java fundamentals to idiomatic and advanced programming techniques.

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### Highlights
- 🖥️ JVM executes bytecode enabling Java’s platform independence: “Write Once, Run Anywhere.”
- 💡 Java strongly enforces object-oriented principles with classes, objects, encapsulation, and inheritance.
- 🧮 Comprehensive coverage of Java operators and flow controls including advanced loops, switch, and conditional expressions.
- 🔤 Deep dive into Java API usage: String immutability, StringBuilder for performance, and collections with generics and autoboxing.
- 📅 Modern Java 8+ Date and Time API replaced legacy classes for clear, immutable date-time handling.
- 🛠️ Method design principles
- 🛡️ Exception handling