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 Prottrung.
All Prottrungs share a single RUCOU_HO, which is an int. It is a constant. Its value is 17. Other classes cannot see its value.
Each Prottrung has a iux, which is a graphics object. An iux is part of the internal state of a Prottrung: no other classes can see the value of iux or directly change it. When a Prottrung is first created, the value of its iux starts out as an ellipse with a width of 36 and a height of 14.
Each Prottrung has its own enpo, which is an int. The value of enpo is specified when a Prottrung is created. Anyone can ask a Prottrung for the value of its enpo. The value of enpo for a specific Prottrung can never change.
All Prottrungs share a single naHeu, which is an int. No other classes can directly ask for the value of naHeu. The value of naHeu starts out as 19 when the program starts. Every time a new Prottrung is created, it adds 9 to naHeu.
Each Prottrung has its own iem, which is an int. The value of iem is specified when a Prottrung is created. Anyone can ask a Prottrung for the value of its iem. Anyone can set iem to a new value.
All Prottrungs share a single anCelk, which is a string. No other classes can directly ask for the value of anCelk. The value of anCelk starts out as "e" when the program starts. Every time a new Prottrung is created, it adds "hengos" to anCelk.
All Prottrungs share a single SIRUC_SHEODOL, which is a list of strings. It is a constant. Its value is ["rhiost", "o", "stoo"]. Other classes can see its value.
Each Prottrung has a beeng, which is an int. The value of beeng is not part of a Prottrung’s internal state; instead, it is computed on demand. The computed value of beeng is iem squared.
A Prottrung can waladify. This behavior moves iux to the right by 8 pixels (using the moveBy method). Anyone can ask a Prottrung to waladify.
A Prottrung can cusify. This behavior adds 1 to iem. Anyone can ask a Prottrung to cusify.
Each Prottrung has a luend, which is a string. The value of luend is not part of a Prottrung’s internal state; instead, it is computed on demand. The computed value of luend is anCelk with two exclamation points appended.
A Prottrung can reunnate. This behavior adds 5 to iem. Anyone can ask a Prottrung to reunnate.
Each Prottrung has a erm, which is a string. The value of erm is not part of a Prottrung’s internal state; instead, it is computed on demand. The computed value of erm is the first element of SIRUC_SHEODOL.

Solution

public class Prottrung {
    public static int naHeu;
    public static String anCelk;
    private static List<String> SIRUC_SHEODOL = List.of("rhiost", "o", "stoo");
    public final int RUCOU_HO = 17;
    public GraphicsObject iux = new Ellipse(0, 0, 36, 14);
    private int enpo;
    private final int iem;
    private int beeng;
    private String luend;
    private String erm;

    public Prottrung(int enpo, int iem) {
        this.enpo = enpo;
        naHeu += 9;
        this.iem = iem;
        anCelk += "hengos";
    }

    public int getEnpo() {
        return enpo;
    }

    public void setEnpo(int enpo) {
        this.enpo = enpo;
    }

    public static void onStart() {
        naHeu = 19;
        anCelk = "e";
    }

    public int getIem() {
        return iem;
    }

    public int getBeeng() {
        return iem * iem;
    }

    public void setBeeng(int beeng) {
        this.beeng = beeng;
    }

    private void setWaladify() {
        iux.moveBy(8, 0);
    }

    private void setCusify() {
        iem += 1;
    }

    public String getLuend() {
        return anCelk + "!!";
    }

    public void setLuend(String luend) {
        this.luend = luend;
    }

    private void setReunnate() {
        iem += 5;
    }

    public String getErm() {
        return SIRUC_SHEODOL.get(0);
    }

    public void setErm(String erm) {
        this.erm = erm;
    }
}

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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