Question

Write a method using JAVA called "maximum4" that returns the maximum of 4 decimal numbers. Use the "math.max" method to implement "maximum4". The user should enter the 4 values and the program determines the maximum and then display the result.

The steps for the Project could be the following:

• Create the Maximum4 method that includes the math.max
• Define and enter the variables
• Apply the Maximum4 method you created to find the maximum of the 4 decimal numbers you entered and then display it.

Answer 1

Code for Above Problem:

import java.util.Scanner;

public class MaximumDemo {

        public static void main(String[] args) {
                Scanner sc = new Scanner(System.in);
                // Asking user to enter decimal number1
                System.out.print("Enter decimal number 1: ");
                double number1 = sc.nextDouble();
                // Asking user to enter decimal number2
                System.out.print("Enter decimal number 2: ");
                double number2 = sc.nextDouble();
                // Asking user to enter decimal number3
                System.out.print("Enter decimal number 3: ");
                double number3 = sc.nextDouble();
                // Asking user to enter decimal number4
                System.out.print("Enter decimal number 4: ");
                double number4 = sc.nextDouble();

                // getting maximum of four decimal numbers by calling maximum4 method
                double max = maximum4(number1, number2, number3, number4);

                // Displaying maximum of four decimal numbers
                System.out.println("Maximum of four decimal numbers is: " + max);
                sc.close();
        }

        // method to return maximum of four decimal numbers
        public static double maximum4(double number1, double number2, double number3, double number4) {
                /*
                 * Single line answer Math.max(Math.max(Math.max(number1,
                 * number2),number3),number4)
                 */

                // get maximum of number1 and number2 and store in max
                double max = Math.max(number1, number2);
                // get maximum of max and number3 and store in max
                max = Math.max(max, number3);
                // get maximum of max and number4 and store in max
                max = Math.max(max, number4);
                // return max which is maximum of four decimal values
                return max;
        }
}

Sample Run Input/Output:

Enter decimal number 1: 15.3
Enter decimal number 2: 27.5
Enter decimal number 3: 82.2
Enter decimal number 4: 82.29
Maximum of four decimal numbers is: 82.29

Image Of Code:

Image Of Sample Run Input/Output: