Here is what I have:
HashMap<String,HashMap<Integer,Integer>> data =
new HashMap<String,HashMap<Integer,Integer>>();
But I am having trouble adding values to this, because the inner hashmap doesn't have a name (note: it isn't supposed to). I'm actually trying to add an array list to the first Integer in HashMap So I am trying something like:
data.put(var, data.get(array.get(x), y));
Which it very much doesn't like and I'm totally clueless as to how to do it.
Note that
HashMap<String,HashMap<Integer,Integer>> data =
new HashMap<String,HashMap<Integer,Integer>>();
only creates the "outer" HashMap instance. After this statement you have an empty HashMap that takes Strings as keys and HashMap<Integer, Integer> as value.
You can add an instance of HashMap<Integer, Integer> to data with this:
data.put("myKey", new HashMap<Integer, Integer>());
After that you can add Integer values to the second HashMap:
data.get("myKey").put(123, 456); // use 123 as key and 456 as value
Get the values back:
data.get("myKey").get(123); // returns 456
You have to get the inner hash map first:
HashMap<Integer,Integer> innerData = data.get(var);
Then you can put your value into it:
innerData.put(x, y);
Just do it like this:
data.put( var, new HashMap(intKey, intVal));
where intKey and intVal are Integer type Key and Integer type value.
HashMap<String,HashMap<Integer,Integer>> data =
new HashMap<String,HashMap<Integer,Integer>>();
((Map)data.get( "keyname" )).get(1);
and subsequently:
((Map)data.get( "keyname" )).get( 1 ).put(2);
