InstructionSet

package InstructionSet;
import java.util.Scanner;

public class InstructionSet{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        boolean check = true; // Created boolean which we use as a condition for out while loop.

        while (check == true) { //Changed the condition.
            String opCode = input.nextLine();//Inserted opCode inside Loop, so each time we can enter a new value for our string.
            if(opCode.equals("END")) {
            	check = false; // Used the boolean value so whenever the input is END we can leave the loop.
            } else {
            	String[] codeArgs = opCode.split(" ");
            	long result = 0;
            	switch (codeArgs[0]) {
            		case "INC": {
            			long operandOne = Integer.parseInt(codeArgs[1]);
            			result = ++operandOne; // Changed from operand++ to ++operand, otherwise we get invalid output.
            			break;
            		}
            		case "DEC": {
            			long operandOne = Integer.parseInt(codeArgs[1]);//Switched to long so we can get our tests running.
            			result = --operandOne;// Changed from operand-- to --operand, otherwise we get invalid output.
            			break;
            		}
            		case "ADD": {
            			long operandOne  = Integer.parseInt(codeArgs[1]);//Switched to long so we can get our tests running.
            			long operandTwo = Integer.parseInt(codeArgs[2]);//Switched to long so we can get our tests running.
            			result = operandOne + operandTwo;
            			break;
	                }
	                case "MLA": {
	                    long operandOne  = Integer.parseInt(codeArgs[1]);//Switched to long so we can get our tests running.
	                    long operandTwo = Integer.parseInt(codeArgs[2]);//Switched to long so we can get our tests running.
	                    result = (long)(operandOne * operandTwo);
	                    break;
	                }
	                default:
	                    break;
	            }

            	System.out.println(result);
            }
        }
    }
}