public void options() { int option; System.out.println("Options: 1 = Add"); System.out.println("Options: 2 = Subtract"); System.out.println("Options: 3 = Divide"); System.out.println("Options: 4 = Multiply"); option = m.op.nextInt(); if (option == 1) { getValue(); c.addNumbers(); } if (option == 2) { getValue(); c.subtractNumbers(); } if (option == 3) { getValue(); c.divideNumbers(); } if (option == 4) { getValue(); c.multiplyNumbers(); } if (option > 4 || option < 1) { System.out.println("You have entered an invalid number"); options(); } }