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(Java) Loading and Parsing a JSON ArrayA JSON array is JSON that begins with "[" and ends with "]". For example, this is a JSON array that contains 3 JSON objects. [{"name":"jack"},{"name":"john"},{"name":"joe"}]A JSON object, however, is JSON that begins with "{" and ends with "}". For example, this JSON is an object that contains an array. {"pets":[{"name":"jack"},{"name":"john"},{"name":"joe"}]}This example shows how loading a JSON array is different than loading a JSON object.
import com.chilkatsoft.*; public class ChilkatExample { static { try { System.loadLibrary("chilkat"); } catch (UnsatisfiedLinkError e) { System.err.println("Native code library failed to load.\n" + e); System.exit(1); } } public static void main(String argv[]) { String strJsonArray = "[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]"; String strJsonObject = "{\"pets\":[{\"name\":\"jack\"},{\"name\":\"john\"},{\"name\":\"joe\"}]}"; // A JSON array must be loaded using JsonArray: CkJsonArray jsonArray = new CkJsonArray(); jsonArray.Load(strJsonArray); // Examine the values: int i = 0; while (i < jsonArray.get_Size()) { CkJsonObject jsonObj = jsonArray.ObjectAt(i); System.out.println(i + ": " + jsonObj.stringOf("name")); i = i+1; } // Output is: // 0: jack // 1: john // 2: joe // A JSON object must be loaded using JsonObject CkJsonObject jsonObject = new CkJsonObject(); jsonObject.Load(strJsonObject); // Examine the values: i = 0; int numPets = jsonObject.SizeOfArray("pets"); while (i < numPets) { jsonObject.put_I(i); System.out.println(i + ": " + jsonObject.stringOf("pets[i].name")); i = i+1; } // Output is: // 0: jack // 1: john // 2: joe } } |
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