using equals or instanceof in toString

using equals or instanceof in toString

Ok guys I have a program with a 'MartianManager' class: *Note code is not
complete still have some missing pieces just supplied entire code for
reference of somewhat how it is going to look when complete
import java.util.ArrayList;
public class MartianManager {
private ArrayList<Martian> martians;
private ArrayList<Martian> teleporters;
public void addMartian(Martian m) {
martians.add(m);
if(m instanceof GreenMartian)
teleporters.add(m);
}
//public Object clone() {
public Martian getMartianClosestToID(int id) {
}
public void groupSpeak() {
for(Martian m : martians) {
m.speak();
}
}
public void groupTeleport(String dest) {
}
}
and Martian class:
public abstract class Martian implements Cloneable {
int id;
public Martian(int id) {
this.id = id;
}
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
public int getId() {
return id;
}
public boolean equals(Object o){
return this.getId() == ((Martian)o).getId();
}
public abstract void speak();
public String toString(){
String str = "";
if (this instanceof GreenMartian) {
str = "Green martian" + id;
}
if (this instanceof RedMartian) {
str = "Red martian" + id;
}
return str;
}
}
it is extended with GreenMartian:
public class GreenMartian extends Martian implements ITeleport{
public GreenMartian(int id) {
super(id);
}
public void speak() {
System.out.println(id + "Grobldy Grock");
}
public void teleport(String dest) {
System.out.println(id + "teleporting to " + dest);
}
}
also extended with RedMartian:
public class RedMartian extends Martian {
public RedMartian(int id) {
super(id);
}
public void speak() {
System.out.println(id + "Rubldy Rock");
}
}
I actually have a few questions , but for now my question is in the
toString of the Martian class. It should return a string like this: "Red
[or Green] martian" +id. I need to determine the type of Martian, I
started to use the instanceof but like this "Martian couldn't be resolved
to a variable". I'm trying to determine if this would be the best way or
if an equals() would be the best way to determine the type?
Also this is my first time using "clone" so not sure how it works exactly,
but had a thought is there a way to determine what the "clone" was and
determine it that way?
Thanks for any and all help!