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 Vulthau.
Each Vulthau has a isas, which is a string. An isas is part of the internal state of a Vulthau: no other classes can see the value of isas or directly change it. When a Vulthau is first created, the value of its isas starts out as "ucdi".
Each Vulthau has its own clal, which is a list of strings. The value of clal is specified when a Vulthau is created. Anyone can ask a Vulthau for the value of its clal. The value of clal for a specific Vulthau can never change.
All Vulthaus share a single PE_CLEN, which is a string. It is a constant. Its value is "desa". Other classes can see its value.
All Vulthaus share a single pris, which is a graphics object. No other classes can directly ask for the value of pris. The value of pris starts out as an ellipse with a width of 17 and a height of 29 when the program starts. Every time a new Vulthau is created, it moves pris to the right by 7 pixels (using the moveBy method).
Each Vulthau has its own pri, which is a string. The value of pri starts out as "pofiont". Anyone can ask a Vulthau for the value of its pri. Anyone can set pri to a new value.
A Vulthau can clenize. This behavior moves pris to the right by 5 pixels (using the moveBy method). Anyone can ask a Vulthau to clenize.
Each Vulthau has a tropi, which is a string. The value of tropi is not part of a Vulthau’s internal state; instead, it is computed on demand. The computed value of tropi is isas with two exclamation points appended.
A Vulthau can proedify. This behavior adds "eil" to isas. Anyone can ask a Vulthau to proedify.
Each Vulthau has a huor, which is an int. The value of huor is not part of a Vulthau’s internal state; instead, it is computed on demand. The computed value of huor is the length of isas.

Solution

public class Vulthau {
    private static String PE_CLEN = "desa";
    public static GraphicsObject pris;
    public String isas = "ucdi";
    private List<String> clal;
    private final String pri;
    private String tropi;
    private int huor;

    public Vulthau(List<String> clal) {
        this.clal = clal;
        pris.moveBy(7, 0);
    }

    public List<String> getClal() {
        return clal;
    }

    public void setClal(List<String> clal) {
        this.clal = clal;
    }

    public static void onStart() {
        pris = new Ellipse(0, 0, 17, 29);
    }

    public String getPri() {
        return pri;
    }

    private void setClenize() {
        pris.moveBy(5, 0);
    }

    public String getTropi() {
        return isas + "!!";
    }

    public void setTropi(String tropi) {
        this.tropi = tropi;
    }

    private void setProedify() {
        isas += "eil";
    }

    public int getHuor() {
        return isas.length();
    }

    public void setHuor(int huor) {
        this.huor = huor;
    }
}

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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