Answer to Question #314879 in Java | JSP | JSF for Hop

Question

3.1 Write a Java program that will compute the future investment value at a given interest rate for a specified number of years. The java program should have a minimum of two classes.

3.1.1 classA

 The main method (starting point) (5)

 The object of classb (5)

 Should also call the void method named futureInvestmentValue (double investment Amount, double monthlyInterestRate, int years) (15)

3.1.2 classB

 A get method named count_words(String str) (15)

Expected Output:

Input the investment amount: 28000

Input the rate of interest: 7

Input number of years: 6

Years Future Value

1. 30024.12

2. 32194.57

3. 34521.92

4. 37017.51

5. 39693.51

6. 42562.95 

Answer 1

import java.util.Scanner;


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


		System.out.println("Enter words in one line separated by a space: ");
		count_words(in.nextLine());
	}


	static void count_words(String str) {
		int count = 0;
		if (str.length() != 0) {
			count++;
			for (int i = 0; i < str.length(); i++) {
				if (str.charAt(i) == ' ') {
					count++;
				}
			}
		}
		System.out.println("There are " + count + " words in a sentence.");
	}
}







import java.util.Scanner;


public class classB {


	public static void main(String[] args) {
		Scanner keyBoard = new Scanner(System.in);
		System.out.print("Input the investment amount: ");
		double investment = keyBoard.nextDouble();
		System.out.print("Input the rate of interest: ");
		double rate = keyBoard.nextDouble();
		System.out.print("Input number of years: ");
		int year = keyBoard.nextInt();


		rate *= 0.01;
		System.out.printf("%-10s%-15s\n", "Years", "FutureValue");
		for (int i = 1; i <= year; i++) {
			System.out.printf("%-10d%-15.2f\n", i, futureInvestmentValue(investment, rate / 12, i));
		}
	}


	public static double futureInvestmentValue(double investmentAmount, double monthlyInterestRate, int years) {
		return investmentAmount * Math.pow(1 + monthlyInterestRate, years * 12);
	}
}