Sokoban java tutorial error- How can I fix it?

[OurOhnlyHope]

I've been trying to replicate a java-based game creation tutorial on Sokoban that I found online, but Netbeans continues to give me errors concerning the following passage:

    public void move(int x, int y) {
        int nx = this.x() + x;
        int ny = this.y() + y;
        this.setX(nx);
        this.setY(ny);
}

Specifically, netbeans tells me that the "this.setX(nx);" and "this.setY(ny);" parts of the code have no symbols.

cannot find symbol
 symbol: method setX(int)

From what I can discern with my newbie grace, this causes a glitch when running the program that results in crash the moment a directional key is input.This piece of code is located at the end of both the Player and Baggage classes, so It's not something I can just edit out.

For those of you who are interested, the exact error is "Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: sokoban.Player.setX".

What can I edit or add to the code that will stop this error I am receiving? Or is my copy of Netbeans just a broken pile of junk? It would help if you can be specific in your answer since I have a rudimentary knowledge of java, at best.

[Tolls]

Your code does not compile because the Player class does not have setX(int) or setY(int) methods.

[OurOhnlyHope]

Alright... what methods should I use instead? Should I declare X or Y a variable?

[Tolls]

What does the tutorial expect you to do?
If it expects you to have setX and setY methods then write them.
They usually take the form:

public void setX(int x) {
   this.x = x;
}