I´m traying to add a value inside an array of values when the key of my hash table is repeated. For example,
Key1 = 123 || Value1 = 23
Key2 = 123 || Value2 = 56
So when I´m done adding my elements, I expect something like
Key1 ==> [23,56]
I have initialized my hash table like this
private myHash<Integer, myObject[]> data;
Best approach is a Map of Integer as Key and a List as Value. Like this:
// This is a member, meaning it's on class level.
private Map<Integer, List<Integer>> myHashMap = new HashMap<>();
// Now populate.. e.g. Key=123, Value 23
private addValueForKey(Integer key, Integer value) {
List<Integer> values = myHashMap.get( key );
if (values == null) {
values = new ArrayList<Integer>();
}
values.add( value );
}
Now each time you want to add a value to your hashmap, just call the method. for example:
addValueForKey( 123, 23 );
addValueForKey( 123, 56 );
Use:
private myHash<Integer, List<Integer>> data;
if(data.containsKey(123)
{
data.get(123).add(Object)
}
else
{
data.put(KeyValue,Object)
}
