Hackforge Academy

Explanation

Compile-time polymorphism is achieved
using method overloading.

Code:

int add(int a, int b) { return a + b; }
double add(double a, double b) { return a + b; }

Explanation

Runtime polymorphism is achieved using
method overriding.

Code:

class A { void show() { System.out.println("A"); } }
class B extends A { void show() { System.out.println("B"); } }

Explanation

In compile-time polymorphism, method
resolution happens at compile time.

Code:

Calculator c = new Calculator();
c.add(10, 20);

Explanation

In runtime polymorphism, method call
depends on object type at runtime.

Code:

A obj = new B();
obj.show();

Explanation

Overloading requires different method signatures.

Code:

void print(int a) {}
void print(String a) {}