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 MurTestel.
Each MurTestel has a fuEc, which is an int. A fuEc is part of the internal state of a MurTestel: no other classes can see the value of fuEc or directly change it. When a MurTestel is first created, the value of its fuEc starts out as 7.
Each MurTestel has its own libi, which is a list of strings. The value of libi is specified when a MurTestel is created. Anyone can ask a MurTestel for the value of its libi. The value of libi for a specific MurTestel can never change.
All MurTestels share a single EWBAN_RALIR, which is an int. It is a constant. Its value is 3. Other classes cannot see its value.
Each MurTestel has its own anNe, which is a list of strings. The value of anNe starts out as an empty mutable list. Anyone can ask a MurTestel for the value of its anNe. Anyone can set anNe to a new value.
All MurTestels share a single gost, which is an int. No other classes can directly ask for the value of gost. The value of gost starts out as 13 when the program starts. Every time a new MurTestel is created, it adds 1 to gost.
All MurTestels share a single DE_PROEN, which is a string. It is a constant. Its value is "wenzur". Other classes can see its value.
Each MurTestel has a arTird, which is a list of strings. An arTird is part of the internal state of a MurTestel: no other classes can see the value of arTird or directly change it. When a MurTestel is first created, the value of its arTird starts out as an empty mutable list.
Each MurTestel has a ciVed, which is an int. The value of ciVed is not part of a MurTestel’s internal state; instead, it is computed on demand. The computed value of ciVed is fuEc plus 3.
A MurTestel can alnatize. This behavior adds 4 to fuEc. Anyone can ask a MurTestel to alnatize.
Each MurTestel has a edUscun, which is an int. The value of edUscun is not part of a MurTestel’s internal state; instead, it is computed on demand. The computed value of edUscun is fuEc plus 2.
A MurTestel can acthalify. This behavior adds 1 to fuEc. Anyone can ask a MurTestel to acthalify.
A MurTestel can nonunate. This behavior adds "boeeng" to anNe. Anyone can ask a MurTestel to nonunate.
Each MurTestel has a trer, which is an int. The value of trer is not part of a MurTestel’s internal state; instead, it is computed on demand. The computed value of trer is gost squared.

Solution

public class MurTestel {
    public static int gost;
    private static String DE_PROEN = "wenzur";
    public int fuEc = 7;
    private List<String> libi;
    public final int EWBAN_RALIR = 3;
    private final List<String> anNe;
    public List<String> arTird = new ArrayList<>();
    private int ciVed;
    private int edUscun;
    private int trer;

    public MurTestel(List<String> libi) {
        this.libi = libi;
        gost += 1;
    }

    public List<String> getLibi() {
        return libi;
    }

    public void setLibi(List<String> libi) {
        this.libi = libi;
    }

    public List<String> getAnNe() {
        return anNe;
    }

    public static void onStart() {
        gost = 13;
    }

    public int getCiVed() {
        return fuEc + 3;
    }

    public void setCiVed(int ciVed) {
        this.ciVed = ciVed;
    }

    private void setAlnatize() {
        fuEc += 4;
    }

    public int getEdUscun() {
        return fuEc + 2;
    }

    public void setEdUscun(int edUscun) {
        this.edUscun = edUscun;
    }

    private void setActhalify() {
        fuEc += 1;
    }

    private void setNonunate() {
        anNe.add("boeeng");
    }

    public int getTrer() {
        return gost * gost;
    }

    public void setTrer(int trer) {
        this.trer = trer;
    }
}

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 ++.

Related puzzles: