Master Java with 200+ Programs – From Basics to Advanced Concepts

Java is one of the most widely used programming languages, powering everything from web applications to enterprise systems. Whether you’re a beginner or an experienced developer, practicing real Java programs is the best way to master the language.

I’ve compiled a comprehensive repository of Java programs that cover 200+ topics, ranging from the fundamentals to advanced features introduced in Java 8 and 9. You can explore the repository on GitHub.

What’s Inside This Repository?

1. Basics & Core Concepts

• Identifiers, Data Types, Literals, Arrays
• Instance, Static, and Local Variables
• Operators: Arithmetic, Bitwise, Relational, Assignment, Conditional, and more
• Flow Control, Import Statements, Package Management

2. Object-Oriented Programming (OOP)

• Classes, Objects, Constructors, Overloading, Overriding
• Abstraction, Encapsulation, Polymorphism
• Relationships: Inheritance, Composition, Aggregation
• Singleton Class, Static & Instance Control Flow

3. Advanced OOP & Exception Handling

• Abstract Class & Interface Constructors
• Exception Hierarchy, Custom Exceptions
• Try-With-Resources (Java 7+ feature)

4. Collections & Generics

• ArrayList, LinkedList, Vector, Stack
• HashSet, TreeSet, HashMap, TreeMap, WeakHashMap, IdentityHashMap
• PriorityQueue, NavigableSet, NavigableMap
• Generic Classes, Bounded Types, Wildcards

5. Functional Programming & Streams

• Functional Interfaces, Lambda Expressions
• Default, Static, and Private Methods in Interfaces
• Predefined Functional Interfaces: Predicate, Function, Consumer, Supplier, BiPredicate, BiFunction, BiConsumer
• Method & Constructor References
• Streams API: filter, map, reduce, forEach

6. Multithreading & Concurrency

• Runnable Interface, Thread Class
• Thread Creation: Class, Anonymous Class, Lambda
• Thread Sleep and Basic Synchronization

7. Date & Time API

• LocalDate, LocalTime, LocalDateTime
• Instant, Period, Duration
• DateTimeFormatter for parsing/formatting
• Adding/subtracting date/time, ChronoUnit calculations

8. Advanced Interface Features

• Private Methods in Interface (Java 9+)

Why This Repository?

• Organized topic-wise for easy learning & practice
• Includes Java 7, 8, 9 features
• Perfect for beginners, students, and interview preparation
• Ready-to-run programs, so you can practice directly

Start exploring the repository and enhance your Java skills today! View on GitHub