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 Tilta.
Each Tilta has its own soZam, which is a graphics object. The value of soZam is specified when a Tilta is created. Anyone can ask a Tilta for the value of its soZam. Anyone can set soZam to a new value.
All Tiltas share a single HEANHIS, which is an int. It is a constant. Its value is 11. Other classes cannot see its value.
Each Tilta has a tia, which is an int. The value of tia is not part of a Tilta’s internal state; instead, it is computed on demand. The computed value of tia is HEANHIS squared.

Solution

public class Tilta {
    private final GraphicsObject soZam;
    public final int HEANHIS = 11;
    private int tia;

    public Tilta(GraphicsObject soZam) {
        this.soZam = soZam;
    }

    public GraphicsObject getSoZam() {
        return soZam;
    }

    public int getTia() {
        return HEANHIS * HEANHIS;
    }

    public void setTia(int tia) {
        this.tia = tia;
    }
}

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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