Please help me with addAll method of ArrayList

Question

Hi guys, I am trying to wrtie a method to add all elements of one ArrayList to another one. My code is
import java.util.*;
public class Purse
public Purse()
coins = new ArrayList<String>();
public void add(String coinName)
coins.add(coinName);
public String toString()
if(coins.size() == 0)
return "Purse[]";
String output = "Purse[";
for(String coin : coins)
output = output + coin + ",";
return output + "]";
public void transfer1(Object other)
Purse otherPurse = (Purse) other;
coins.addAll(otherPurse);
other = null;
private ArrayList<String> coins;
The error i got is Purse.java:41: cannot find symbol
symbol : method addAll(Purse)
location: class java.util.ArrayList<java.lang.String>
coins.addAll(otherPurse);
^
1 error
Tool completed with exit code 1
when i tried to do in simple way it is perfectly work which is
import java.util.*;
public class TransferArrayList
public static void main(String args[])
ArrayList<String> list = new ArrayList();
list.add("abc");
list.add("fda");
ArrayList<String> list1 = new ArrayList();
list1.addAll(list);
System.out.print(list1);
list.clear();
System.out.println(list);
Can some one please tell me where i m doing mistake.
Edited by: Virk on Nov 1, 2007 6:47 AM

Answer 1

As I could see the code, you are trying to add a java object into the collection which is not permitted.
The Purse object is not a collection type. If you can see the parameter of list.addAll(Collection aCollection) method is required a collection.
So you can try this
*public class Purse{*
private List coins;
*public Purse(){*
coins = new ArrayList();
*public List getCoinList(){*
return coins;
*public void transfer1(Purse other){*
coins.addAll(other.getCoinList());
cheer :)