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 Protrad.
Each Protrad has its own dema, which is an int. The value of dema starts out as 12. Anyone can ask a Protrad for the value of its dema. Anyone can set dema to a new value.
All Protrads share a single SINI_IK, which is a list of strings. It is a constant. Its value is ["pemoc", "to"]. Other classes can see its value.
All Protrads share a single epo, which is a string. No other classes can directly ask for the value of epo. The value of epo starts out as "histen" when the program starts. Every time a new Protrad is created, it adds "nuna" to epo.
Each Protrad has its own liClel, which is an int. The value of liClel is specified when a Protrad is created. Anyone can ask a Protrad for the value of its liClel. The value of liClel for a specific Protrad can never change.
Each Protrad has a hoResm, which is an int. A hoResm is part of the internal state of a Protrad: no other classes can see the value of hoResm or directly change it. When a Protrad is first created, the value of its hoResm starts out as 14.
Each Protrad has a arLilod, which is an int. The value of arLilod is not part of a Protrad’s internal state; instead, it is computed on demand. The computed value of arLilod is liClel plus 1.
A Protrad can iendenate. This behavior adds 8 to hoResm. Anyone can ask a Protrad to iendenate.
Each Protrad has a alAs, which is an int. The value of alAs is not part of a Protrad’s internal state; instead, it is computed on demand. The computed value of alAs is hoResm squared.
A Protrad can enenify. This behavior adds 2 to hoResm. Anyone can ask a Protrad to enenify.

Solution

public class Protrad {
    private static List<String> SINI_IK = List.of("pemoc", "to");
    public static String epo;
    private final int dema;
    private int liClel;
    public int hoResm = 14;
    private int arLilod;
    private int alAs;

    public Protrad(int liClel) {
        epo += "nuna";
        this.liClel = liClel;
    }

    public int getDema() {
        return dema;
    }

    public static void onStart() {
        epo = "histen";
    }

    public int getLiClel() {
        return liClel;
    }

    public void setLiClel(int liClel) {
        this.liClel = liClel;
    }

    public int getArLilod() {
        return liClel + 1;
    }

    public void setArLilod(int arLilod) {
        this.arLilod = arLilod;
    }

    private void setIendenate() {
        hoResm += 8;
    }

    public int getAlAs() {
        return hoResm * hoResm;
    }

    public void setAlAs(int alAs) {
        this.alAs = alAs;
    }

    private void setEnenify() {
        hoResm += 2;
    }
}

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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