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.)

  1. One kind of thing that exists in our model is a Nont.

  2. All Nonts share a single RATSMAD, which is a graphics object. It is a constant. Its value is an ellipse with a width of 17 and a height of 18. Other classes can see its value.

  3. Each Nont has its own tror, which is a list of strings. The value of tror starts out as an empty mutable list. Anyone can ask a Nont for the value of its tror. Anyone can set tror to a new value.

  4. Each Nont has its own thi, which is a string. The value of thi is specified when a Nont is created. Anyone can ask a Nont for the value of its thi. The value of thi for a specific Nont can never change.

  5. All Nonts share a single rir, which is a graphics object. No other classes can directly ask for the value of rir. The value of rir starts out as a rectangle with a width of 19 and a height of 23 when the program starts. Every time a new Nont is created, it moves rir to the right by 4 pixels (using the moveBy method).

  6. Each Nont has a iol, which is a graphics object. An iol is part of the internal state of a Nont: no other classes can see the value of iol or directly change it. When a Nont is first created, the value of its iol starts out as a rectangle with a width of 48 and a height of 48.

  7. All Nonts share a single ilInian, which is a graphics object. No other classes can directly ask for the value of ilInian. The value of ilInian starts out as an ellipse with a width of 25 and a height of 13 when the program starts. Every time a new Nont is created, it moves ilInian to the right by 8 pixels (using the moveBy method).

  8. Each Nont has a erEi, which is a string. An erEi is part of the internal state of a Nont: no other classes can see the value of erEi or directly change it. When a Nont is first created, the value of its erEi starts out as "en".

  9. All Nonts share a single ALLFRONT, which is a graphics object. It is a constant. Its value is an ellipse with a width of 39 and a height of 17. Other classes cannot see its value.

  10. A Nont can peoilize. This behavior moves ilInian to the right by 3 pixels (using the moveBy method). Anyone can ask a Nont to peoilize.

  11. Each Nont has a pio, which is an int. The value of pio is not part of a Nont’s internal state; instead, it is computed on demand. The computed value of pio is the x position of iol.

  12. A Nont can asdurify. This behavior adds "trencis" to tror. Anyone can ask a Nont to asdurify.

  13. Each Nont has a tuwad, which is an int. The value of tuwad is not part of a Nont’s internal state; instead, it is computed on demand. The computed value of tuwad is the width of iol.

  14. Each Nont has a imes, which is an int. The value of imes is not part of a Nont’s internal state; instead, it is computed on demand. The computed value of imes is the x position of ilInian.

  15. A Nont can eterate. This behavior adds "weou" to tror. Anyone can ask a Nont to eterate.

  16. Each Nont has a plik, which is an int. The value of plik is not part of a Nont’s internal state; instead, it is computed on demand. The computed value of plik is the size of tror.

Solution

public class Nont {
    private static GraphicsObject RATSMAD = new Ellipse(0, 0, 17, 18);
    public static GraphicsObject rir;
    public static GraphicsObject ilInian;
    public static GraphicsObject ALLFRONT = new Ellipse(0, 0, 39, 17);
    private final List<String> tror;
    private String thi;
    public GraphicsObject iol = new Rectangle(0, 0, 48, 48);
    public String erEi = "en";
    private int pio;
    private int tuwad;
    private int imes;
    private int plik;

    public Nont(String thi) {
        this.thi = thi;
        rir.moveBy(4, 0);
        ilInian.moveBy(8, 0);
    }

    public List<String> getTror() {
        return tror;
    }

    public String getThi() {
        return thi;
    }

    public void setThi(String thi) {
        this.thi = thi;
    }

    public static void onStart() {
        rir = new Rectangle(0, 0, 19, 23);
        ilInian = new Ellipse(0, 0, 25, 13);
    }

    private void setPeoilize() {
        ilInian.moveBy(3, 0);
    }

    public int getPio() {
        return iol.getX();
    }

    public void setPio(int pio) {
        this.pio = pio;
    }

    private void setAsdurify() {
        tror.add("trencis");
    }

    public int getTuwad() {
        return iol.getWidth();
    }

    public void setTuwad(int tuwad) {
        this.tuwad = tuwad;
    }

    public int getImes() {
        return ilInian.getX();
    }

    public void setImes(int imes) {
        this.imes = imes;
    }

    private void setEterate() {
        tror.add("weou");
    }

    public int getPlik() {
        return tror.size();
    }

    public void setPlik(int plik) {
        this.plik = plik;
    }
}

Things to check in your solution:

Acceptable variations in the solution:


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