Best way to construct an object class with a collection array of three elements

Question

I was thinking about making in Java a collection class of an array with three elements: object , string, boolean like in the way I can use in a loop like:

for ( objectArray collectionElement  : ArrayElementsCollection ) {
   if ( collectionElement.String == 'type_of_element' && collectionElement.boolean ) {
      // doing what I need with collectionElement.Object
   }
}

What would be the best way to implement it? Using an ArrayList<ArrayList<ArrayList>>? A map?

EDIT Aug 15, 2023

Thanks to @tgdavies , I figured simplest way to manage my list which was a collection of active interfaces based on @tgdavies sample, I made:

class myConnections {
    public String connectionName;
    public int connectionType;
    public Boolean connectionState;
    public String connectionAddress;

    .....
}

public class MainCustomClass() {
    
    private customConnections(){ collectionConnections = new ArrayList<myConnections>(); }
        
    public void getActiveConnections() {
        customConnections.clear();

        if (!localIPs.isEmpty() && localIPs.size() > 0) {
            IntStream.range(0, localIPs.size())
                .forEach(i -> customConnections.add(new myConnections(localHostnames.get(i), connectionType, connectionState, localIPs.get(i))));
        }
    }
}

so it worked for my scopes. Thanks again @tgdavies!

Answer 1

You just need a List of a class with three fields (in real life, write getters, I've omitted them for simplicity):

class Record {
  public String string;
  public boolean bool;
  public Object object;
}

Then your code becomes:

List<Record> records = ...
for ( Record record: records) {
   if ( record.string.equals("type_of_element") && record.bool ) {
      // doing what I need with record.object
   }
}

This answer assumes that you might have many records which match. If you want to go directly to a single record which has a string element of "type_of_element" and a bool which is true, you could also use nested Maps:

Map<String,Map<Boolean,Object>> records = ...
Map<Boolean,Object> boolMap = records.get("type_of_element");
if (boolMap!= null) {
  Object obj = boolMap.get(true);
  if (obj != null) {
    // do your stuff on obj
  }
}