Java error = is not abstract and does not override abstract method

im have and error Ikan is not abstract and does not override abstract method setName class Ikan extends Animal implements Pet and Kucing is not abstract and does not override abstract method setName class Kucing extends Animal implements Pet

abstract class Animal {
    protected int Legs;
    protected String Eater;
    Animal (int l,String e) {
        Legs = l;
        Eater = e;
    }
    abstract public void walk ();
    abstract public void eat ();
    int getLegs () {
        return Legs;
    }
    String getEater () {
        return Eater;
    }
}

interface Pet {
    void setName();
    String getName();
    void balikNama();
    void play();
}

class Ikan extends Animal implements Pet {
    String name,mainan;
    Ikan (int l,String e) {
        super(l,e);
    }
    void setMainan (String m) {
        mainan = m;
    }
    void getMainan () {
        System.out.println ("Ikan ini bermain"+mainan);
    }
    public void setName (String n) {
        name = n;
    }
    public String getName () {
        return name;
    }
    public void balikNama () {
        for (String part : name.split(" ")) {
            System.out.print(new StringBuilder(part).reverse().toString());
            System.out.print(" ");
        }
    }
    public void play () {
        System.out.println (name+" lagi mainan "+mainan);
    }
    public void walk () {
        System.out.println ("Tidak bisa berjalan bisanya renang");
    }
    public void eat () {
        System.out.println ("Hewan ini memakan "+Eater);
    }
}

class Kucing extends Animal implements Pet {
    String name,mainan;
    Kucing (int l,String e) {
        super(l,e);
    }
    void setMainan (String m) {
        mainan = m;
    }
    void getMainan () {
        System.out.println ("Kucing ini bermain"+mainan);
    }
    public void setName (String n) {
        name = n;
    }
    public String getName () {
        return name;
    }
    public void balikNama () {
        for (String part : name.split(" ")) {
            System.out.print(new StringBuilder(part).reverse().toString());
            System.out.print(" ");
        }
    }
    public void play () {
        System.out.println (name+" lagi mainan "+mainan);
    }
    public void walk () {
        System.out.println ("Berjalan dengan "+Legs+" kaki");
    }
    public void eat () {
        System.out.println ("Hewan ini memakan "+Eater);
    }
}

class Laba extends Animal {
    String name;
    Laba (int l,String e) {
        super(l,e);
    }
    void setName (String n) {
        name = n;
    }
    public String getName () {
        return name;
    }
    public void balikNama () {
        for (String part : name.split(" ")) {
            System.out.println(new StringBuilder(part).reverse().toString());
        }
    }
    public void walk () {
        System.out.println ("Berjalan dengan "+Legs+" kaki");
    }
    public void racun () {
        System.out.println ("Cuma sedikit racunya");
    }
    public void eat () {
        System.out.println ("Hewan ini memakan "+Eater);
    }
}

class Tarantula extends Laba{
    String name;
    Tarantula (int l,String e,String n) {
        super(l,e);
        name = n;
    }
    void setName (String n) {
        name = n;
    }
    public String getName () {
        return name;
    }
    public void balikNama () {
        for (String part : name.split(" ")) {
            System.out.println(new StringBuilder(part).reverse().toString());
        }
    }
    public void walk () {
        System.out.println ("Berjalan dengan "+Legs+" kaki");
    }
    public void racun () {
        System.out.println ("Banyak racunya");
    }

}

class TestAnimal {
    public static void main (String[]args) {
        Ikan I = new Ikan (0,"Manusia");
        Kucing K = new Kucing (4,"Ikan");
        Laba L = new Laba (6,"Kucing");
        Tarantula T = new Tarantula (6,"Burung","Joni");
        I.setName ("Piranha");
        K.setName ("Tiger");
        L.setName ("Spiderman");
        I.setMainan ("Ikan lainnya");
        K.setMainan ("Burung");
        Animal [] A = new Animal [4];
        A[0] = I;
        A[1] = K;
        A[2] = L;
        A[3] = T;
        for (int i = 0;i < 4;i++) {
            if (A[i] instanceof Laba) {
                System.out.println ("Ini bukan hewan peliharaan bro");
                System.out.print ("Laba laba ini bernama "+A[i].getName());
                A[i].balikNama();
                A[i].walk();
                A[i].racun();
                A[i].eat();
            } else {
                A[i].getName();
                A[i].balikNama();
                A[i].walk();
                A[i].eat();
                A[i].getMainan();
            }
        }
    }
}