Java

JSON: Access Array Values

See more JSON Examples

Demonstrates how to access values in a JSON array. Java

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[])
  {
    boolean success = false;

    CkJsonObject json = new CkJsonObject();

    String jsonStr = "{ \"id\": 1, \"name\": \"A green door\", \"tags\": [\"home\", 22, \"green\"], \"price\": 125 }";

    success = json.Load(jsonStr);
    if (success != true) {
        System.out.println(json.lastErrorText());
        return;
        }

    // Get the "tags" array, which contains "home", 22, "green"
    CkJsonArray tagsArray = json.ArrayOf("tags");
    if (json.get_LastMethodSuccess() == false) {
        System.out.println("tags member not found.");
        return;
        }

    // Get the value at each array index. 
    // Output will be:
    // [0] = home
    // [0] as integer = 0
    // [1] = 22
    // [1] as integer = 22
    // [2] = green
    // [2] as integer = 0

    int arraySize = tagsArray.get_Size();
    int i;
    for (i = 0; i <= arraySize - 1; i++) {

        String sValue = tagsArray.stringAt(i);

        System.out.println("[" + i + "] = " + sValue);

        int iValue = tagsArray.IntAt(i);
        System.out.println("[" + i + "] as integer = " + iValue);

        }

    // Note: The StringAt method returns the value as a string regardless of the type.

    // The IntAt method returns the value as an integer.  If the value does not convert to 
    // an integer, then 0 is returned
  }
}