Package ... does not exist error in intellij idea [duplicate]

Question

I'm new in Java and can not get idea of using packages. Am I stupid or is this some kind of bug?

Guys, how to deal with this error?

C:\Users\batievskiy\IdeaProjects\JavaPset\src>java Test.java
Test.java:1: error: package pkgcalculate does not exist
import pkgcalculate.Calculator;
                   ^
Test.java:5: error: cannot find symbol
        Calculator obj = new Calculator();
        ^
  symbol:   class Calculator
  location: class Test
Test.java:5: error: cannot find symbol
        Calculator obj = new Calculator();
                             ^
  symbol:   class Calculator
  location: class Test
3 errors
error: compilation failed

this is Calculator code:

package pkgcalculate;

public class Calculator {
    public int add(int a, int b){
        return a+b;
    }
    public static void main(String[] args){
        Calculator obj = new Calculator();
        System.out.println(obj.add(10, 20));
    }
}

from what I got: that I cannot run Test.java from the terminal directly using: java Test.java But if I run Test with Shift + F10, the program is compiled. Why is that? Is it normal behaviour?

Answer 1

If you compiling your code from command line you have to compile classes you depend on first.

Or compile them all together in one go.