title: How to call a method using a parameter in Java 8?
body: <p>I'm doing an exercise where I prompt the user to give me their operator of choice and two different numbers and then I output the result. I know I can easily do this exercise with a if else or a switch case however I'd really like to make it work this way. The problem is at my operator method, apparently in Java you can't pass in a parameter and use that parameter to call a method. Is there a way to make this work? If you were confused by the question I'd be glad to clarify.</p>
  
  <pre><code>import java.util.Scanner;
  
  public class methods {
      public static void main(String[] args) {
          Scanner sc = new Scanner(System.in);
          System.out.println("Welcome, choose your operator, would you like to add, subtract, multiply, or divide?");
          String typeofOperator = sc.nextLine();
          System.out.print("Enter the first number: ");
          int firstNumber = sc.nextInt();
          System.out.print("Enter the second number: ");
          int secondNumber = sc.nextInt();
          operator(typeofOperator, firstNumber, secondNumber);
      }
  
      public static void operator(String typeofOperator, int firstNumber, int secondNumber) {
          typeofOperator(firstNumber, secondNumber);
      }
  
      public static int add(int firstNumber, int secondNumber) {
          int answer = firstNumber + secondNumber;
          result(answer);
      }
      public static int subtract(int firstNumber, int secondNumber) {
          int answer = firstNumber - secondNumber;
          result(answer);
      }
      public static int multiply(int firstNumber, int secondNumber) {
          int answer = firstNumber * secondNumber;
          result(answer);
      }
      public static int divide(int firstNumber, int secondNumber) {
          int answer = firstNumber / secondNumber;
          result(answer);
      }
      public static void result(int result) {
          System.out.println("This is the result: " + result);
      }
  }
  </code></pre>