Example: Simple Interest Program in Java using Inheritance

// Simple Interest Program in Java using Inheritance
import java.util.Scanner;

// This class will calculate the simple interest
class CalcSimpleInterest {
    public float CalculateInterest(float x, float y, float z) {
        return (x * y * z) / 100;
    }
}

// This class will inherit `CalcSimpleInterest` class and print the simple interest
class PrintSimpleInterest extends CalcSimpleInterest {
    public void PrintInterest(float SI) {
        System.out.println("\nSimple Interest = " + SI);
    }
}

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        System.out.println("Enter the principal (amount), time, and rate::");

        float p = in.nextFloat(); // value of the principal
        float t = in.nextFloat(); // value of the time
        float r = in.nextFloat(); // value of the rate
        
        PrintSimpleInterest SimpleInterest = new PrintSimpleInterest();

        // It will calculate the simple interest
        float SI = SimpleInterest.CalculateInterest(p, t, r);

        // It will produce the final output
        SimpleInterest.PrintInterest(SI);
    }
}