Semantic portal
Polymorphism
Polymorphism allows one method to have different implementations based on the object that calls it. It can happen at compile-time or runtime.
// Method Overloading (Compile-time Polymorphism)
class Calculator {
public int add(int a, int b) {
return a + b;
}
public int add(int a, int b, int c) {
return a + b + c;
}
}
public class Main {
public static void main(String[] args) {
Calculator calc = new Calculator();
System.out.println(calc.add(10, 20)); // Output: 30
System.out.println(calc.add(10, 20, 30)); // Output: 60
}
}// Method Overriding (Runtime Polymorphism)
class Animal {
public void sound() {
System.out.println("Animal makes a sound");
}
}
class Dog extends Animal {
@Override
public void sound() {
System.out.println("Dog barks");
}
}
public class Main {
public static void main(String[] args) {
Animal myDog = new Dog();
myDog.sound(); // Output: Dog barks
}
}