为什么我收到错误：在 java 中找不到符号？

Question

Error Messages [1]: https://i.stack.imgur.com/6Jfk1.jpg [2]: https://i.stack.imgur.com/MfX4T.jpg [3]: https://i.stack.imgur.com/4R6n3.jpg

I ran these two programs on my laptop and it ran fine. I decided to download it and send it to my computer but now I am getting an error message. I saved both programs in the same file and they are the same version of JGrasp. Any ideas on why this is happening? Should I be importing the class before using it?

Answer 1

To use the type Die you need to define the type Die in a file called Die.java which contains

public class Die {

    ... and some stuff here ...

}

In java you cannot use a type until it is created with some sort of "class " statement, and if that type is in a different package, then you need to import it with the line

import some.other.package.Die;

Answer 2

Your class is called PairOfDice , while you're trying to instanciate an object of the Die class. Die is only a method of the class mentioned before. You'll need to instanciate your die like this:

PairOfDice die1 = new PairOfDice();