HashMap declarations

Programming Questions

asimes

in Programming Questions • 1 year ago

Could someone please post how to make any of the following? I don't know if any of the moderators here have any influence over what gets put into reference or learning but this would be really helpful I think. It doesn't seem like Processing covers HashMaps much farther than these:

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

http://processing.org/learning/topics/hashmapclass.html

and the suggested reference from Processing's HashMap reference:

http://docs.oracle.com/javase/1.4.2/docs/api/java/util/HashMap.html

1. A HashMap of arrays. By this I mean that every key in the HashMap has an array as its value.

2. A HashMap of ArrayLists. Same idea as above.

3. A HashMap of HashMaps that each store an array. Same idea as above although it would be nice to also have how to correctly declare the type. For example <String, ???<???>>

Replies(2)

kooogy

Re: HashMap declarations

1 year ago

hashmaps are a java thing rather than a processing thing so i don't think the processing documentation needs to go much further than it already does.

HashMap<String, String[]> // 1 untested
HashMap<String, ArrayList<String> // 2 untested
HashMap<String, HashMap<String, String[]>> // 3 untested
// generally this is HashMap<KeyType, ValueType>
// and assumes all the keys and values are strings

PhiLho

Re: HashMap declarations

1 year ago

Look at Java 1.6 reference instead of the 1.4 one. I know the docs are a bit outdated, but I suppose the priority is to fix the future 2.0 rather than polishing the docs.