Java
for Python developers

Java for Python Developers

📒 Java
⏱️ 2-5 hours
✏️ Last update

Welcome to the world of Java! As a Python developer, you’re about to embark on an exciting journey that will expand your programming horizons and open up new opportunities.

Why learn Java?

Java is a versatile, powerful, and widely-used programming language that can significantly enhance your skill set. It’s the backbone of enterprise software development, Android app creation, and large-scale web applications. By learning Java, you’ll gain access to a vast job market and the ability to build robust, scalable applications across various platforms. Plus, Java’s strong typing and object-oriented nature will deepen your understanding of programming concepts.

What You’ll Learn

  • How to leverage your Python knowledge to quickly grasp Java concepts
  • The fundamentals of Java syntax and its object-oriented programming model
  • Key differences between Python and Java, including static typing and compilation
  • Java’s approach to concurrency and memory management
  • How to work with Java’s rich ecosystem of libraries and frameworks
  • Best practices for writing efficient and maintainable Java code

Course Content

Lesson 1: Getting Started with Java Jump to lesson
- Setting up a Java development environment (JDK, IDE) - Understanding the Java ecosystem (JVM, bytecode) - Writing and running your first Java program - Comparing Java's compilation process to Python's interpretation - Basic syntax differences: semicolons, braces, and static typing
Lesson 2: Variables, Data Types, and Operators Jump to lesson
- Java's primitive types vs. Python's dynamic typing - Declaring and initializing variables in Java - Type inference with 'var' (Java 10+) - Arithmetic, logical, and comparison operators - Operator precedence and associativity - Type conversion and casting
Lesson 3: Control Structures and Functions Jump to lesson
- If-else statements and switch expressions - Loops: for, while, do-while, and enhanced for-loop - Defining and calling methods in Java - Method overloading (not available in Python) - Static vs. instance methods - Varargs and default arguments
Lesson 4: Arrays and Collections Jump to lesson
- Arrays in Java: fixed-size vs. Python's dynamic lists - Java Collections Framework: List, Set, Map - ArrayList and LinkedList implementations - HashSet and TreeSet for unique elements - HashMap and TreeMap for key-value pairs - Iterating over collections: for-each loop and iterators
Lesson 5: Object-Oriented Programming in Java Jump to lesson
- Classes and objects: similarities and differences to Python - Constructors and the 'new' keyword - Access modifiers: public, private, protected, package-private - Inheritance and the 'extends' keyword - Abstract classes and interfaces - Method overriding and the '@Override' annotation
Lesson 6: String Manipulation and Regular Expressions Jump to lesson
- String class and its immutability - StringBuilder for efficient string concatenation - Common string methods and their Python equivalents - Regular expressions with the Pattern and Matcher classes - Formatting strings: printf-style and String.format()
Lesson 7: Exception Handling and Input/Output Jump to lesson
- Checked vs. unchecked exceptions - Try-catch blocks and the finally clause - Creating custom exceptions - File I/O operations using java.io and java.nio.file - Working with streams for efficient I/O - Serialization and deserialization of objects
Lesson 8: Generics and Collections Framework Jump to lesson
- Introduction to generics: type safety and reusability - Generic classes and methods - Wildcards and bounded type parameters - Collections with generics - Comparable and Comparator interfaces for sorting
Lesson 9: Functional Programming in Java Jump to lesson
- Lambda expressions and functional interfaces - Method references - Stream API for collection processing - Optional class for null safety - Functional programming constructs compared to Python
Lesson 10: Concurrency and Multithreading Jump to lesson
- Creating and managing threads in Java - Synchronization and the 'synchronized' keyword - Concurrent collections - ExecutorService and thread pools - CompletableFuture for asynchronous programming - Comparing Java's concurrency model with Python's GIL and asyncio
Lesson 11: Java Memory Management and Performance Jump to lesson
- Java's automatic memory management vs. Python's - Understanding the garbage collector - Stack vs. heap memory - Memory leaks and how to avoid them - Profiling and optimizing Java applications - Best practices for writing efficient Java code
Lesson 12: Advanced Java Features Jump to lesson
- Annotations and their uses - Reflection API for runtime introspection - Java modules (introduced in Java 9) - Pattern matching (preview feature) - Records for immutable data classes - Sealed classes for restricting inheritance
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