Step 1

Program Approach:

Importing necessary packages to get a standard I/O.
Defining a main class.
Inside a main class defining a main function.
Inside the main function using Scanner class to read input from the user.
Declaring variables of integer type to store the values input by the user and to calculate there sum.
Prompting a message to enter three integer numbers from user and store them into variables.
Calling a method computeSum() to calculate the sum of the numbers.
Finally, displaying the sum as a output.

Defining a function computeSum() to calculate the sum of the three integer numbers.
In this function passing three numbers in the parameters of the function.
Then calculating the sum of the numbers and returning the sum.

Step 2

Program:

// Importing packages

import java.util.*;

/*class definition*/

public class calculateSum

{

/*main method*/

public static void main(String[] args)

{

/*Scanner class to read input from the user*/

Scanner read=new Scanner(System.in);

/*variables*/

int a,b,c,sum;

/*read three integers from user*/

System.out.print("Enter the value of a: ");

a=read.nextInt();

System.out.print("Enter the value of b: ");

b=read.nextInt();

System.out.print("Enter the value of c: ");

c=read.nextInt();

/*method call*/

sum=computeSum(a,b,c);

/*print sum*/

System.out.print("The sum of "+a+", "+b+" and "+c+" is "+sum);

}

/*method to compute sum*/

public static int computeSum(int a,int b,int c)

{

/*calculate and return sum*/

int sum=a+b+c;

return sum;

}

}

Step 3

OUTPUT:

Write a method that takes three integer numbers and returns the sum. In java.

Public Answer