Name

loadJSONArray()

Description

Loads an array of JSON objects from the data folder or a URL, and returns a JSONArray. Per standard JSON syntax, the array must be enclosed in a pair of hard brackets [], and each object within the array must be separated by a comma.

All files loaded and saved by the Processing API use UTF-8 encoding.

Examples

  • // The following short JSON file called "data.json" is parsed 
    // in the code below. It must be in the project's "data" folder.
    
    /*
    [
      {
        "id": 0,
        "species": "Capra hircus",
        "name": "Goat"
      },
      {
        "id": 1,
        "species": "Panthera pardus",
        "name": "Leopard"
      },
      {
        "id": 2,
        "species": "Equus zebra",
        "name": "Zebra"
      }
    ]
    */
    
    JSONArray values;
    
    void setup() {
    
      values = loadJSONArray("data.json");
    
      for (int i = 0; i < values.size(); i++) {
        
        JSONObject animal = values.getJSONObject(i); 
    
        int id = animal.getInt("id");
        String species = animal.getString("species");
        String name = animal.getString("name");
    
        println(id + ", " + species + ", " + name);
      }
    }
    
    // Sketch prints:
    // 0, Capra hircus, Goat
    // 1, Panthera pardus, Leopard
    // 2, Equus zebra, Zebra
    

Syntax

  • loadJSONArray(filename)
  • loadJSONArray(file)

Parameters

  • filename(String)name of a file in the data folder or a URL

Return

  • JSONArray