ibo
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LinkedHashMap equivalent for JDK 1.3
Im looking for alternative implementation for LinkedHashMap so that my code will work with JDK 1.3. (LinkedHashMap was introduced in 1.4). do u guys know if there are already made code for this (before i try to roll my own). Does the Trove Collection classes have the equivalent? Thanks!
zzynx
Can't you just copy/paste the code of LinkedHashMap?
ASKER
ive tried that. but it uses protected classes/attributes of HashMap, so i copy-pasted HashMap, then again HashMap requires another protected code from another class, which means i have to copy another class again. I think that would be my last resort if i didnt find any other alternative solution.
ok Use Vector, and for your object to be collected into this vector make sure u have implemented:
public boolan equals(Object obj)
to be used in:
Vector.contains()
Vector.indexOf()
public boolan equals(Object obj)
to be used in:
Vector.contains()
Vector.indexOf()
ASKER CERTIFIED SOLUTION
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Or you could maintain both a list and a map, something like:
public class ListMap
{
List list = new ArrayList();
Map map = new HasMap();
void add(Object key, Object o)
{
map.put(key, o);
list.add(key);
}
Object get(Object key)
{
return map.get(key);
}
Iterator iterator()
{
return list.iterator();
}
..
}
public class ListMap
{
List list = new ArrayList();
Map map = new HasMap();
void add(Object key, Object o)
{
map.put(key, o);
list.add(key);
}
Object get(Object key)
{
return map.get(key);
}
Iterator iterator()
{
return list.iterator();
}
..
}