How to iterate over a JSONObject?

Maybe this will help:

JSONObject jsonObject = new JSONObject(contents.trim());Iterator<String> keys = jsonObject.keys();while(keys.hasNext()) {    String key = keys.next();    if (jsonObject.get(key) instanceof JSONObject) {          // do something with jsonObject here          }}

for my case i found iterating the names() works well

for(int i = 0; i<jobject.names().length(); i++){    Log.v(TAG, "key = " + jobject.names().getString(i) + " value = " + jobject.get(jobject.names().getString(i)));}

I will avoid iterator as they can add/remove object during iteration, also for clean code use for loop. it will be simply clean & fewer lines.

Using Java 8 and Lamda [Update 4/2/2019]

import org.json.JSONObject;public static void printJsonObject(JSONObject jsonObj) {    jsonObj.keySet().forEach(keyStr ->    {        Object keyvalue = jsonObj.get(keyStr);        System.out.println("key: "+ keyStr + " value: " + keyvalue);        //for nested objects iteration if required        //if (keyvalue instanceof JSONObject)        //    printJsonObject((JSONObject)keyvalue);    });}

Using old way [Update 4/2/2019]

import org.json.JSONObject;public static void printJsonObject(JSONObject jsonObj) {    for (String keyStr : jsonObj.keySet()) {        Object keyvalue = jsonObj.get(keyStr);        //Print key and value        System.out.println("key: "+ keyStr + " value: " + keyvalue);        //for nested objects iteration if required        //if (keyvalue instanceof JSONObject)        //    printJsonObject((JSONObject)keyvalue);    }}

Original Answer

import org.json.simple.JSONObject;public static void printJsonObject(JSONObject jsonObj) {    for (Object key : jsonObj.keySet()) {        //based on you key types        String keyStr = (String)key;        Object keyvalue = jsonObj.get(keyStr);        //Print key and value        System.out.println("key: "+ keyStr + " value: " + keyvalue);        //for nested objects iteration if required        if (keyvalue instanceof JSONObject)            printJsonObject((JSONObject)keyvalue);    }}