Error: "Cannot find symbol" - class instance inside Main class, using Linux terminal

I have an exercise to solve, which consists of creating a simple Java language calculator.

I have to through the Terminal, send the two numbers as arguments to my program. I'm using the following build command:

 zeluis@zeluis-HP-EliteBook-8460p ~/NetBeansProjects/SOCP1/src/socp1 $ javac MainEX1.java

Only it gives me the following error:

    EX1.java
MainEX1.java:62: error: cannot find symbol
        CalculatorMethodos cM = new CalculatorMethodos();
        ^
  symbol:   class CalculatorMethodos
  location: class MainEX1
MainEX1.java:62: error: cannot find symbol
        CalculatorMethodos cM = new CalculatorMethodos();
                                    ^
  symbol:   class CalculatorMethodos
  location: class MainEX1
2 errors

I leave down the MAIN class:

 int num1, num2, total = 0, opcCalc, vef = -1;
    CalculatorMethodos cM = new CalculatorMethodos();
  //read from keyboard
    Scanner lerDataKeyBoard = new Scanner(System.in);
    // BufferedReader lerDataKeyBoard = new BufferedReader(new InputStreamReader(System.in));
/*    System.out.println("First number:\n");
    num1 = lerDataKeyBoard.nextInt();
    System.out.println("Second number:\n");
    num2 = lerDataKeyBoard.nextInt(); */


    System.out.println("Introduza a operação:\n");
    System.out.println("'1' - SUM\n");
    System.out.println("'2' - SUBTRACT\n");
    System.out.println("'3' - MULTIPLY\n");
    System.out.println("'4' - DIVIDE\n");

    opcCalc = lerDataKeyBoard.nextInt();

    switch (opcCalc) {
        case 1:
           total = cM.add(Integer.parseInt(args[0]), Integer.parseInt(args[1]));
            break;
        case 2:
          // total = cM.sub(args[0], args[1]);
            break;
        case 3:
         //   total = cM.sub(args[0], args[1]);
            break;
        case 4:
           // total = cM.div(args[0], args[1]);
            break;
    }
    System.out.println("Resultado:" + total);

}

CALCULATOR CLASS:

    public class CalculatorMethodos {

    private int total;

    public int add (int num1, int num2) {
        return total = num1 + num2;

    }
     public int sub(int num1, int num2) {
        return total = num1 - num2;

    }
      public int mult (int num1, int num2) {
        return total = num1 * num2;

    }
       public int div (int num1, int num2) {
        return total = num1 / num2;

    }
}

Solution The solution to this error was to use the javac command with - cp e"..":

javac -cp .. MainEX1.java

New error - when I try to use command java MainEX1

Error: Could not find or load main class MainEX1