gistfile1.java

package stringCalculator;
import java.util.Scanner;

public class StringCalculatorIf {
	public static String[] myInput() {
		Scanner sc = new Scanner(System.in);
		String[] splitedValue = sc.nextLine().split(" ");		
		sc.close();
		return splitedValue;
	}
	
	public static int calculate(String[] value) {
		int first = Integer.parseInt(value[0]);
		int second = Integer.parseInt(value[2]);
		String operator = value[1];
		
		if (operator == "+") {
			int ret = first+second;
			return ret;
		}
		if (operator == "-") {
			return first - second;
		}
		if (operator == "*") {
			return first * second;
		}
		if (operator == "/") {
			return first / second;
		}
		System.out.println(first);
		System.out.println(operator);
		System.out.println(second);
		return 404;
	
	}
	public static void main(String[] args) {
		String[] arr = myInput();
//		System.out.println(arr[0]);
//		System.out.println(arr[1]);
//		System.out.println(arr[2]);
		System.out.println(calculate(arr));
	}
}