Java programming using Methods This time write a class that contains the four me

Question

Java programming using Methods

This time write a class that contains the four methods:

(Add, Subtract, Multiply, and Divide)

You can enter 1, 2, 3, or 4 for choosing an addition, subtraction, multiplication, or division test. After a test is finished, the menu is re-displayed. You may choose another test or enter 5 to exit the system. Each test generates two random single-digit numbers to form a question for addition, subtraction, multiplication, or division. For a subtraction such as number1 – number2, number1 is greater than or equal to number2. For a division question such as number1 / number2, number2 is not zero.

Explanation / Answer

import java.util.*;

import java.lang.*;

import java.io.*;

class myArithmetic

{

                public static void main (String[] args) throws java.lang.Exception

                {

                                int ch;

        System.out.print("Choose desired operation ");

        System.out.print("Enter 1 for Addition ");

        System.out.print("Enter 2 for Subtraction ");

        System.out.print("Enter 3 for Multiplication ");

        System.out.print("Enter 4 for Division ");

        System.out.print("Enter 5 to Exit ");

        Scanner scan = new Scanner(System.in);

        ch = scan.nextInt();

        if(ch == 1)

            arithAdd();

        if(ch == 2)

            arithSub();

        if(ch == 3)

            arithMul();

        if(ch == 4)

            arithDiv();

        if(ch == 5)

            System.exit(0);

                }

                public static void arithAdd()

                {

                   Random rand = new Random();

       int a = rand.nextInt(9) + 0;

       int b = rand.nextInt(9) + 0;

       int c = a + b;

       System.out.print("Sum of 2 random numbers " + a + " and" + b + " is " + c);

                }

                public static void arithSub()

                {

                Random rand = new Random();

       int a = rand.nextInt(9) + 0;

       int b = rand.nextInt(9) + 0;

       int c, t;

       if(a<b)

       {

           t = a;

           a = b;

           b = t;

       }

       c = a - b;

       System.out.print("Subtraction of 2 random numbers " + a + " and" + b + " is " + c);

                }

                public static void arithMul()

                {

                   Random rand = new Random();

       int a = rand.nextInt(9) + 0;

       int b = rand.nextInt(9) + 0;

       int c = a * b;

       System.out.print("Multiplication of 2 random numbers " + a + " and" + b + " is " + c);

                }

                public static void arithDiv()

                {

                   Random rand = new Random();

       int a = rand.nextInt(9) + 0;

       int b = rand.nextInt(9) + 1;

       int c = a / b;

       System.out.print("Division of 2 random numbers " + a + " and" + b + " is " + c);

                }

}

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