Question

How to calculate simple interest in Java

Answer 1

public class SimpleInterestCalculator {
    public static void main(String args[]) {
        float PrincipalAmount = 30000F;
        float Rate = 4F;
        float Years = 3F;
 
        float SimpleInterest = (PrincipalAmount * Rate * Years) / 100;
 
        System.out.print("Simple Interest is : " + SimpleInterest);
    }
}

 
 
 
/*
run:
 
Simple Interest is : 3600.0
 
*/

 

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Answer 2

public class SimpleInterestCalculator {

    // Method to calculate simple interest
    public static double calculateSimpleInterest(double principal, double rate, double years) {
        if (principal < 0 || rate < 0 || years < 0) {
            throw new IllegalArgumentException("Principal, rate, and time must be non-negative.");
        }
        return (principal * rate * years) / 100;
    }

    public static void main(String[] args) {

        try {
            // Input principal amount
            double principal = 30000F;

            // Input annual interest rate
            double rate = 4F;

            // Input time in years
            double years = 3F;

            // Calculate simple interest
            double simpleInterest = calculateSimpleInterest(principal, rate, years);

            // Display the result
            System.out.printf("The Simple Interest is: %.2f\n", simpleInterest);

        } catch (Exception e) {
            System.out.println("Invalid input. Please enter valid numeric values.");
        } 
    }
}

 

/*
run:

The Simple Interest is: 3600.00

*/

 

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