How can one make an associative array with objects as values in processing?

Question

I have tried using the Hashmap data structure to create an associative array in processing with objects as values and, of course, strings as keys.

http://processing.org/reference/HashMap.html

However, I couldn't get the values of my hash map to be objects of a class I made.

Here is what I tried:

class Person {

    public String firstName, lastName;

    Person(String f, String l) {
        this.firstName = f;
        this.lastName = l;
    }

}

HashMap<Person> persons;
persons = new HashMap();

Processing returns a bizarre error:

Cannot find anything named "persons"

Did you cast them to those objects? Where is your sniplet? Would be nice to see. — F. Müller
– F. Müller, Commented Mar 28, 2012 at 22:18
What's your base language? C#, Java or what? Can you put your code here so it will make it easy to understand problem. — Hamza Waqas
– Hamza Waqas, Commented Mar 28, 2012 at 22:20
I'm using the language of processing, which is based off of Java. I will be able to get a code snippet up asap. — dangerChihuahua007
– dangerChihuahua007, Commented Mar 28, 2012 at 22:22
try HashMap<Person> persons = new HashMap()<Person>; and then access by persons.get("index here"); — Hamza Waqas
– Hamza Waqas, Commented Mar 28, 2012 at 22:28

Darius · Accepted Answer · 2016-11-29 00:43:26Z

1

You can use a generic HashMap:

Map<String, Object> map = new HashMap<String, Object>();

// Save data:
map.put("associativeIndex", new Object());

// Access data:
map.get("associativeIndex");

edited Nov 29, 2016 at 0:43

answered Mar 28, 2012 at 23:10

Darius

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