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Calculator.java

@@ -0,0 +1,61 @@
+import java.util.InputMismatchException;
+import java.util.Scanner;
+import java.util.Objects;
+
+public class Calculator {
+
+    public static void main(String[] args) {
+
+        try {
+            while (true) {
+                int number1, number2;
+                int result = 0;
+                String operator;
+
+                System.out.println("Operations are: “add”, “sub”, “mul”, “div”");
+                System.out.println("Enter first number:");
+                Scanner scanner = new Scanner(System.in);
+
+                if (scanner.hasNextInt()) {
+                    number1 = scanner.nextInt();
+
+                    System.out.println("Enter second number:");
+                    number2 = scanner.nextInt();
+
+                    System.out.println("Enter an operation:");
+                    operator = scanner.next();
+
+                    switch (operator) {
+                        case "add":
+                            result = number1 + number2;
+                            break;
+
+                        case "sub":
+                            result = number1 - number2;
+                            break;
+
+                        case "mul":
+                            result = number1 * number2;
+                            break;
+
+                        case "div":
+                            result = number1 / number2;
+                            break;
+
+                        default:
+                            System.out.println("wrong input");
+                            break;
+                    }
+                    System.out.println("Result: " + result);
+                } else if (Objects.equals(scanner.next(), "q")) {
+                    break;
+                } else {
+                    System.out.println("You're input is invalid. Chose a number.");
+                }
+            }
+
+        } catch (InputMismatchException e) {
+            System.err.println(e);
+        }
+    }
+}