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 Ceabam.
Each Ceabam has its own niss, which is a string. The value of niss is specified when a Ceabam is created. Anyone can ask a Ceabam for the value of its niss. Anyone can set niss to a new value.
Each Ceabam has its own trutu, which is a list of strings. The value of trutu is specified when a Ceabam is created. Anyone can ask a Ceabam for the value of its trutu. The value of trutu for a specific Ceabam can never change.
Each Ceabam has a pocra, which is a string. The value of pocra is not part of a Ceabam’s internal state; instead, it is computed on demand. The computed value of pocra is niss with two exclamation points appended.

Solution

public class Ceabam {
    private final String niss;
    private List<String> trutu;
    private String pocra;

    public Ceabam(String niss, List<String> trutu) {
        this.niss = niss;
        this.trutu = trutu;
    }

    public String getNiss() {
        return niss;
    }

    public List<String> getTrutu() {
        return trutu;
    }

    public void setTrutu(List<String> trutu) {
        this.trutu = trutu;
    }

    public String getPocra() {
        return niss + "!!";
    }

    public void setPocra(String pocra) {
        this.pocra = pocra;
    }
}

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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