How to get constants value by using Contract name

Question

for example:

contract A {
    uint constant public START_TIME = 10;
}

---

import "./A.sol"

contract B {
    function test() public {
        uint startTime = A.START_TIME;
    }
}

---

If I only need the value of constants, I do not need the actual instance, right?

Answer 1

The constant is defined and stored in the contract. Therefore, you do need the instance of the contract the constant is defined in.