package calculator;

public class MyCalculator {

public static void main(String args[]) {

OtherOps op = new OtherOps();

do {

System.out.println("Enter a valid operator");

op.set_op();

}while(op.op != '+' && op.op != '-'&& op.op != '*' && op.op !='/');

switch (op.op) {

case '*': op.result = op.multiply();

case '/': op.result = op.divide();

case '+': op.result = op.add();

case '-': op.result = op.subtract();

default: break;

}

System.out.println(op.result);

}

package calculator;

import java.util.Scanner;

public class Operators {

private int num1;

private int num2;

char op;

private Scanner sca;

int result;

char command;

public Operators() {

sca = new Scanner(System.in);

System.out.println("Welcome to Calculator Calculations!");

System.out.println("Enter two numbers below");

System.out.println("Please enter the first number:");

num1 = sca.nextInt();

System.out.println("Please enter the second number:");

num2 = sca.nextInt();

System.out.println("What operation would you like to choose for these numbers?");

System.out.println("Your options are: "+ "+, " + "-, " + "/, " + "*");

System.out.println("Please type one of the options here:");

op = (char)sca.nextShort();

if(op == '+' ||op == '-' || op == '/' || op == '*') {

return;

}

}

public char set_op(){

op = (char)sca.nextShort();

return op;

}

public int add() {

return this.num1 + this.num2;

}

public int subtract() {

return this.num1 - this.num2;

}

public int getX() {

return this.num1;

}

public int getY() {

return this.num2;

}

public void setX(int x) {

this.num1 = x;

}

public void setY(int y) {

this.num2 = y;

}

}

/*public int Sin(int x) {

int z;

z = Sin(x);

return z;

}

}

*/

package calculator;

public class OtherOps extends Operators {

public OtherOps() {

super();

}

public int multiply() {

return this.getX() * this.getY();

}

public int divide() {

int z;

z = this.getY();

if(z==0) {

return 0;

}

return this.getX() / z;

}

}

Every time I run this program, I get this below:

Welcome to Calculator Calculations!

Enter two numbers below

Please enter the first number:

4

Please enter the second number:

6

What operation would you like to choose for these numbers?

Your options are: +, -, /, *

Please type one of the options here:

+

Exception in thread "main" java.util.InputMismatchException

at java.base/java.util.Scanner.throwFor(Scanner.java:860)

at java.base/java.util.Scanner.next(Scanner.java:1497)

at java.base/java.util.Scanner.nextShort(Scanner.java:2021)

at java.base/java.util.Scanner.nextShort(Scanner.java:1975)

at calculator.Operators.(Operators.java:22)

at calculator.OtherOps.(OtherOps.java:5)

at calculator.MyCalculator.main(MyCalculator.java:5)

PLEASE HELP ME ASAP. I don't know exactly what to do and what is wrong.