Save Entity Position into Hashmap

How would I put an entity's position into a hashmap
So I would do:
npc.getLocation();
What would I add to that line to save it into a hashmap?

This is my hashmap:
HashMap<Integer,String> guideVillagers = new HashMap<Integer,String>();

Is an Integer, String hashmap correct?

This is what I'm using to save and load my hashmaps (From the tut!)

Code:java

 
public void save(HashMap<Integer, String> guideVillagers2, String path)
{
try
{
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(path));
oos.writeObject(guideVillagers2);
oos.flush();
oos.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
 
public HashMap<Integer, String> load(String path)
{
try
{
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(path));
Object result = ois.readObject();
return (HashMap<Integer, String>)result;
}
catch(Exception e)
{
e.printStackTrace();
}
return null;
}

 

LordVakar
It would be a lot easier to be a <Integer, Location> map. That way, you key the entity id to the location of the entity.

 

When using a Loaction object, keep in mind that this will Bukkit to not unload the affected chunk or world, unless you delete this location from the map. So it may cause a memory leak.
To prevent this, better store the location in a concaternated string.
Like:

Code:

world_x_y_z

in your HashMap. So use a HashMap<Integer, String> for it to store the entities ID and location.

 

try using BukkitObjectOutputStream