Class declarations and object modeling: Correct Solution

Translate the specification below into an idiomatic Java class definition.

(In this context, "idiomatic" means following the common style and conventions of the language.)

One kind of thing that exists in our model is a Muedon.
Each Muedon has its own oro, which is a graphics object. The value of oro is specified when a Muedon is created. Anyone can ask a Muedon for the value of its oro. The value of oro for a specific Muedon can never change.
All Muedons share a single LIOU_SHRISSUL, which is a graphics object. It is a constant. Its value is a rectangle with a width of 20 and a height of 20. Other classes cannot see its value.
Each Muedon has a erAn, which is an int. The value of erAn is not part of a Muedon’s internal state; instead, it is computed on demand. The computed value of erAn is the x position of oro.

Solution

public class Muedon {
    public static GraphicsObject LIOU_SHRISSUL = new Rectangle(0, 0, 20, 20);
    private GraphicsObject oro;
    private int erAn;

    public Muedon(GraphicsObject oro) {
        this.oro = oro;
    }

    public GraphicsObject getOro() {
        return oro;
    }

    public void setOro(GraphicsObject oro) {
        this.oro = oro;
    }

    public int getErAn() {
        return oro.getX();
    }

    public void setErAn(int erAn) {
        this.erAn = erAn;
    }
}

Things to check in your solution:

Is every public and private modifier correct?
Are the correct items static?
Are the correct items final?
Are all the variable types and method return types correct?
Are the class members in the correct order? It should be: (1) static variables, (2) instance variables, (3) constructors, (4) methods.
Do members have the correct capitalization?

Acceptable variations in the solution:

It is OK if you initialized non-static variables in the constructor instead of in the declaration. (Ask your instructor if you aren’t clear what this means.) Note that static variables must be initialized in the declaration.
It is OK if you used a slightly different but equivalent form of an expression, such as += 1 instead of ++.

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