Multimap in Processing

Question

I would like to know a way to use multimap in Processing IDE.

Is there any libraries which I can use?

I need to add several values for same key in a map.

Your help is much appreciated.

Answer 1

You can add following library

http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/collect/Multimap.html

Multimap<String,Object> myMultimap = ArrayListMultimap.create();

public class MutliMapTest {
    public static void main(String... args) {
  Multimap<String, String> myMultimap = ArrayListMultimap.create();

  // Adding some key/value
  myMultimap.put("Fruits", "Bannana");
  myMultimap.put("Fruits", "Apple");
  myMultimap.put("Fruits", "Pear");
  myMultimap.put("Vegetables", "Carrot");

  // Getting the size
  int size = myMultimap.size();
  System.out.println(size);  // 4

  // Getting values
  Collection<String> fruits = myMultimap.get("Fruits");
  System.out.println(fruits); // [Bannana, Apple, Pear]

  Collection<String> vegetables = myMultimap.get("Vegetables");
  System.out.println(vegetables); // [Carrot]

  // Iterating over entire Mutlimap
  for(String value : myMultimap.values()) {
   System.out.println(value);
  }

  // Removing a single value
  myMultimap.remove("Fruits","Pear");
  System.out.println(myMultimap.get("Fruits")); // [Bannana, Pear]

  // Remove all values for a key
  myMultimap.removeAll("Fruits");
  System.out.println(myMultimap.get("Fruits")); // [] (Empty Collection!)
 }
}

You can download from here

https://code.google.com/p/guava-libraries/