public class Zoopark {

    public static void main(String[] args) {

        Bassein V1 = new Bassein(2);
        Waterfowl B = new Waterfowl("Vala", 100, true);
        V1.putAnimal(B);
        Waterfowl C = new Waterfowl("Lilu", 100, true);
        V1.putAnimal(C);
        Bird D = new Bird("Abara", 100, true);
        V1.putAnimal(D);

        OpenCage V2 = new OpenCage(4);
        Ungulates E = new Ungulates("Kala", 1000, true);
        V2.putAnimal(E);
        Ungulates I = new Ungulates("Nala", 1000, true);
        V2.putAnimal(I);
        Ungulates F = new Ungulates("Mala", 1000, true);
        V2.putAnimal(F);
        Ungulates U = new Ungulates("Ala", 1000, true);
        V2.putAnimal(U);

    }

}

abstract public class Animals {

    private String name;
    private int weight;
    // is this boy?
    private boolean isMale;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return weight;
    }

    public void setAge(int age) {
        this.weight = weight;
    }

    public boolean isMale() {
        return isMale;
    }

    public void setMale(boolean isMale) {
        this.isMale = isMale;
    }

    public Animals(String name, int weight, boolean isMale) {
        this.name = name;
        this.weight = weight;
        this.isMale = isMale;
    }

}

public class Bassein extends Valers {

    Bassein(int maxAnimal) {
    super(maxAnimal);
    }

    public void putAnimal(Waterfowl a) {
    super.putAnimal(a);
    }

    public void putAnimal(Animals a) {
    //super.putAnimal(a);
    System.out.println("Не тот вид животного");
    }
}

public class OpenCage extends Valers {

    OpenCage(int maxAnimal) {
    super(maxAnimal);
    }

    public void putAnimal(Ungulates a) {
    super.putAnimal(a);
    }

    public void putAnimal(Animals a) {
    //super.putAnimal(a);
    System.out.println("Не тот вид животного");
    }
}

import java.util.ArrayList;
    import java.util.List;

    public class Valers {

    private int CageLimit;

    List<Animals> result = new ArrayList<Animals>();

    Valers(int maxAnimal) {
        this.CageLimit = maxAnimal;
    }
    public void putAnimal(Animals a) {

        int numAnimals=result.size();

        if (numAnimals>=CageLimit) {
           System.out.println("Вольер уже полный");
           System.out.println(" ");
        }
        else {
           this.result.add(a);
           System.out.println("Животное добавлено в вольер");
           System.out.println("  ");
        }
    }

    public int getCageAnimals() {
        return result.size();
    }
}

public class Ungulates extends Animals {

    public Ungulates(String name, int weight, boolean isMale) {
        super(name, weight, isMale);
        System.out.println(name + " " + weight + " " + isMale);
    }
}

public class Waterfowl extends Animals {

    public Waterfowl(String name, int weight, boolean isMale) {
        super(name, weight, isMale);
        System.out.println(name + " " + weight + " " + isMale);
    }
}