for (String varValue : arrayList1) {
Map<String, String> mapInstance = new HashMap<>();
val.put(KEY, VALUE);
val.put(VAR_KEY, varValue);
arrayList2.add(mapInstance);
}
Basically, I want to create a map with two entries and then add each of these maps to a list.
Final list:
{KEY,VALUE} {VAR_KEY,arrayList1.get(0)}
{KEY,VALUE} {VAR_KEY,arrayList1.get(1)}
{KEY,VALUE} {VAR_KEY,arrayList1.get(2)}
...
and so on
It seems you only need a simple map stage.
List<Map<String, String>> list = arrayList1.stream().map(t -> {
Map<String, String> map = new HashMap<>();
map.put("KEY", "VALUE");
map.put("VAR_KEY", t);
return map;
}).collect(Collectors.toList());
What is KEY and VAR_KEY? are they instance variable of some object which you are trying to put in Map from the incoming object.
However, you can try something like this : Map result = arrayList1.stream().collect(Collectors.toMap(Class::getKey, c -> c));
mapto create and return a newHashMapand collect into a list.