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Java Concepts I’m Mastering – Part 5: Method Overloading Continuing my journey of mastering Java fundamentals while building real projects. Today’s concept: Method Overloading. What is Method Overloading? Method Overloading means: Same method name, but different parameters. Java decides which method to call based on: Number of parameters Type of parameters Order of parameters Example class Calculator { int add(int a, int b) { return a + b; } double add(double a, double b) { return a + b; } int add(int a, int b, int c) { return a + b + c; } } Same method name → add Different parameter lists → Overloading Why is it Useful? Improves code readability Makes APIs cleaner Supports compile-time polymorphism Important Rule You cannot overload methods by only changing the return type. This is invalid: int add(int a, int b) double add(int a, int b) // Error Parameters must differ. What I Learned Overloading makes code flexible It’s resolved at compile-time It’s one of the foundations of Polymorph