JSONObject a = new JSONObject();
        a.put("key", "value");
        JSONObject b = new JSONObject();
        b.put("key", "value");

        a.equals(b); //would return true

                    c = x.next();
                    if (c == '-') {
                        if (x.next() == '-') {
                            x.skipPast("-->");
                        }
                        x.back();
                    } else if (c == '[') {

   } else if (value.getClass().isArray()) {

    } else if (value == null || value.equals(null)) {
        writer.write("null");
   }

<?xml version="1.0" encoding="UTF-8"?>
<subsonic-response xmlns="http://subsonic.org/restapi" status="ok" version="1.6.0">
  <playlists>
    <playlist id="476c65652e6d3375" name="Mood"/>
    <playlist id="50617274792e78737066" name="Party"/>
  </playlists>
</subsonic-response>

    try {
        char initial = string.charAt(0);
        boolean negative = false;
        if (initial == '-') {
            initial = string.charAt(1);
            negative = true;
        }
        if (initial == '0' && string.charAt(negative ? 2 : 1) == '0') {
            return string;
        }
        if ((initial >= '0' && initial <= '9')) {
            if (string.indexOf('.') >= 0) {
                return Double.valueOf(string);
            } else if (string.indexOf('e') < 0 && string.indexOf('E') < 0) {
                Long myLong = new Long(string);
                if (myLong.longValue() == myLong.intValue()) {
                    return new Integer(myLong.intValue());
                } else {
                    return myLong;
                }
            }
        }
    }  catch (Exception ignore) {
    }

{"cook_time":"3 hours","name":"bread","tagName":"recipe","childNodes":[{"tagName":"title","childNodes":["Basic bread"]},{"amount":8,"unit":"dL","tagName":"ingredient","childNodes":["Flour"]},{"amount":10,"unit":"grams","tagName":"ingredient","childNodes":["Yeast"]},{"amount":4,"unit":"dL","tagName":"ingredient","state":"warm","childNodes":["Water"]},{"amount":1,"unit":"teaspoon","tagName":"ingredient","childNodes":["Salt"]},{"tagName":"instructions","childNodes":[{"tagName":"step","childNodes":["Mix all ingredients together."]},{"tagName":"step","childNodes":["Knead thoroughly."]},{"tagName":"step","childNodes":["Cover with a cloth, and leave for one hour in warm room."]},{"tagName":"step","childNodes":["Knead again."]},{"tagName":"step","childNodes":["Place in a bread baking tin."]},{"tagName":"step","childNodes":["Cover with a cloth, and leave for one hour in warm room."]},{"tagName":"step","childNodes":["Bake in the oven at 180(degrees)C for 30 minutes."]}]}],"prep_time":"5 mins"}

{"cook_time":"3 hours","childNodes":[{"childNodes":["Basic bread"],"tagName":"title"},{"unit":"dL","childNodes":["Flour"],"tagName":"ingredient","amount":8},{"unit":"grams","childNodes":["Yeast"],"tagName":"ingredient","amount":10},{"state":"warm","unit":"dL","childNodes":["Water"],"tagName":"ingredient","amount":4},{"unit":"teaspoon","childNodes":["Salt"],"tagName":"ingredient","amount":1},{"childNodes":[{"childNodes":["Mix all ingredients together."],"tagName":"step"},{"childNodes":["Knead thoroughly."],"tagName":"step"},{"childNodes":["Cover with a cloth, and leave for one hour in warm room."],"tagName":"step"},{"childNodes":["Knead again."],"tagName":"step"},{"childNodes":["Place in a bread baking tin."],"tagName":"step"},{"childNodes":["Cover with a cloth, and leave for one hour in warm room."],"tagName":"step"},{"childNodes":["Bake in the oven at 180(degrees)C for 30 minutes."],"tagName":"step"}],"tagName":"instructions"}],"tagName":"recipe","name":"bread","prep_time":"5 mins"}

{ "test" : [1,2,3,4] }

public Object nextContent() throws JSONException {
    char c;
    StringBuffer sb;
    c = next();
    /*
     * do { c = next(); } while
     * (Character.isWhitespace(c));
     */
    if (c == 0) {
        return null;
    }
    if (c == '<') {
        return XML.LT;
    }
    sb = new StringBuffer();
    for (;;) {
        if (c == '<' || c == 0) {
            back();
            //return sb.toString().trim();
            return sb.toString();
        }
        if (c == '&') {
            sb.append(nextEntity(c));
        } else {
            sb.append(c);
        }
        c = next();
    }
}

/**
 * Put a key/double pair in the JSONObject.
 *
 * @param key   A key string.
 * @param value A float which is the value.
 * @return this.
 * @throws JSONException If the key is null or if the number is invalid.
 */
public JSONObject put(String key, float value) throws JSONException {
    this.put(key, Double.parseDouble(String.valueOf(value)));
    return this;
}

public void testNull() throws Exception {
    JSONObject j;

    j = new JSONObject("{\"message\":\"null\"}");
    assertFalse(j.isNull("message"));
    assertEquals("null", j.getString("message"));

    j = new JSONObject("{\"message\":null}");
    assertTrue(j.isNull("message"));
    assertEquals(null, j.getString("message")); // fail here: getString should return null instead of "null"
}

        c = x.nextClean();
        if (c == '=') {
            if (x.next() != '>') {
                x.back();
            }
        } else if (c != ':') {
            throw x.syntaxError("Expected a ':' after a key");
        }
        this.putOnce(key, x.nextValue());

        switch (x.nextClean()) {
        case ';':
        case ',':
            if (x.nextClean() == '}') {
                return;
            }
            x.back();
            break;
        case '}':
            return;
        default:
            throw x.syntaxError("Expected a ',' or '}'");
        }
    }
}


/**
 * Construct a JSONObject from a Map.
 *
 * @param map A map object that can be used to initialize the contents of
 *  the JSONObject.
 * @throws JSONException
 */
public JSONObject(Map<String,Object> map) {
    this.map = new HashMap<String,Object>();
    if (map != null) {
        Iterator<Map.Entry<String, Object>> i = map.entrySet().iterator();
        while (i.hasNext()) {
            Map.Entry<String, Object> e = i.next();
            Object value = e.getValue();
            if (value != null) {
                this.map.put(e.getKey(), wrap(value));
            }
        }
    }
}


/**
 * Construct a JSONObject from an Object using bean getters.
 * It reflects on all of the public methods of the object.
 * For each of the methods with no parameters and a name starting
 * with <code>"get"</code> or <code>"is"</code> followed by an uppercase letter,
 * the method is invoked, and a key and the value returned from the getter method
 * are put into the new JSONObject.
 *
 * The key is formed by removing the <code>"get"</code> or <code>"is"</code> prefix.
 * If the second remaining character is not upper case, then the first
 * character is converted to lower case.
 *
 * For example, if an object has a method named <code>"getName"</code>, and
 * if the result of calling <code>object.getName()</code> is <code>"Larry Fine"</code>,
 * then the JSONObject will contain <code>"name": "Larry Fine"</code>.
 *
 * @param bean An object that has getter methods that should be used
 * to make a JSONObject.
 */
public JSONObject(Object bean) {
    this();
    this.populateMap(bean);
}


/**
 * Construct a JSONObject from an Object, using reflection to find the
 * public members. The resulting JSONObject's keys will be the strings
 * from the names array, and the values will be the field values associated
 * with those keys in the object. If a key is not found or not visible,
 * then it will not be copied into the new JSONObject.
 * @param object An object that has fields that should be used to make a
 * JSONObject.
 * @param names An array of strings, the names of the fields to be obtained
 * from the object.
 */
public JSONObject(Object object, String names[]) {
    this();
    Class<?> c = object.getClass();
    for (int i = 0; i < names.length; i += 1) {
        String name = names[i];
        try {
            this.putOpt(name, c.getField(name).get(object));
        } catch (Exception ignore) {
        }
    }
}


/**
 * Construct a JSONObject from a source JSON text string.
 * This is the most commonly used JSONObject constructor.
 * @param source    A string beginning
 *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
 *  with <code>}</code>&nbsp;<small>(right brace)</small>.
 * @exception JSONException If there is a syntax error in the source
 *  string or a duplicated key.
 */
public JSONObject(String source) throws JSONException {
    this(new JSONTokener(source));
}


/**
 * Construct a JSONObject from a ResourceBundle.
 * @param baseName The ResourceBundle base name.
 * @param locale The Locale to load the ResourceBundle for.
 * @throws JSONException If any JSONExceptions are detected.
 */
public JSONObject(String baseName, Locale locale) throws JSONException {
    this();
    ResourceBundle bundle = ResourceBundle.getBundle(
            baseName, 
            locale,
            Thread.currentThread().getContextClassLoader());

    Enumeration<String> keys = bundle.getKeys();
    while (keys.hasMoreElements()) {
        String key = keys.nextElement();
        if (key != null) {

            String[] path = ((String)key).split("\\.");
            int last = path.length - 1;
            JSONObject target = this;
            for (int i = 0; i < last; i += 1) {
                String segment = path[i];
                JSONObject nextTarget = target.optJSONObject(segment);
                if (nextTarget == null) {
                    nextTarget = new JSONObject();
                    target.put(segment, nextTarget);
                }
                target = nextTarget;
            }
            target.put(path[last], bundle.getString((String)key));
        }
    }
}


/**
 * Accumulate values under a key. It is similar to the put method except
 * that if there is already an object stored under the key then a
 * JSONArray is stored under the key to hold all of the accumulated values.
 * If there is already a JSONArray, then the new value is appended to it.
 * In contrast, the put method replaces the previous value.
 *
 * If only one value is accumulated that is not a JSONArray, then the
 * result will be the same as using put. But if multiple values are
 * accumulated, then the result will be like append.
 * @param key   A key string.
 * @param value An object to be accumulated under the key.
 * @return this.
 * @throws JSONException If the value is an invalid number
 *  or if the key is null.
 */
public JSONObject accumulate(
    String key,
    Object value
) throws JSONException {
    testValidity(value);
    Object object = this.opt(key);
    if (object == null) {
        this.put(key, value instanceof JSONArray
                ? new JSONArray().put(value)
                : value);
    } else if (object instanceof JSONArray) {
        ((JSONArray)object).put(value);
    } else {
        this.put(key, new JSONArray().put(object).put(value));
    }
    return this;
}


/**
 * Append values to the array under a key. If the key does not exist in the
 * JSONObject, then the key is put in the JSONObject with its value being a
 * JSONArray containing the value parameter. If the key was already
 * associated with a JSONArray, then the value parameter is appended to it.
 * @param key   A key string.
 * @param value An object to be accumulated under the key.
 * @return this.
 * @throws JSONException If the key is null or if the current value
 *  associated with the key is not a JSONArray.
 */
public JSONObject append(String key, Object value) throws JSONException {
    testValidity(value);
    Object object = this.opt(key);
    if (object == null) {
        this.put(key, new JSONArray().put(value));
    } else if (object instanceof JSONArray) {
        this.put(key, ((JSONArray)object).put(value));
    } else {
        throw new JSONException("JSONObject[" + key +
                "] is not a JSONArray.");
    }
    return this;
}


/**
 * Produce a string from a double. The string "null" will be returned if
 * the number is not finite.
 * @param  d A double.
 * @return A String.
 */
public static String doubleToString(double d) {
    if (Double.isInfinite(d) || Double.isNaN(d)) {
        return "null";
    }

    String string = Double.toString(d);
    if (string.indexOf('.') > 0 && string.indexOf('e') < 0 &&
            string.indexOf('E') < 0) {
        while (string.endsWith("0")) {
            string = string.substring(0, string.length() - 1);
        }
        if (string.endsWith(".")) {
            string = string.substring(0, string.length() - 1);
        }
    }
    return string;
}


/**
 * Get the value object associated with a key.
 *
 * @param key   A key string.
 * @return      The object associated with the key.
 * @throws      JSONException if the key is not found.
 */
public Object get(String key) throws JSONException {
    if (key == null) {
        throw new JSONException("Null key.");
    }
    Object object = this.opt(key);
    if (object == null) {
        throw new JSONException("JSONObject[" + quote(key) +
                "] not found.");
    }
    return object;
}


/**
 * Get the boolean value associated with a key.
 *
 * @param key   A key string.
 * @return      The truth.
 * @throws      JSONException
 *  if the value is not a Boolean or the String "true" or "false".
 */
public boolean getBoolean(String key) throws JSONException {
    Object object = this.get(key);
    if (object.equals(Boolean.FALSE) ||
            (object instanceof String &&
            ((String)object).equalsIgnoreCase("false"))) {
        return false;
    } else if (object.equals(Boolean.TRUE) ||
            (object instanceof String &&
            ((String)object).equalsIgnoreCase("true"))) {
        return true;
    }
    throw new JSONException("JSONObject[" + quote(key) +
            "] is not a Boolean.");
}


/**
 * Get the double value associated with a key.
 * @param key   A key string.
 * @return      The numeric value.
 * @throws JSONException if the key is not found or
 *  if the value is not a Number object and cannot be converted to a number.
 */
public double getDouble(String key) throws JSONException {
    Object object = this.get(key);
    try {
        return object instanceof Number
            ? ((Number)object).doubleValue()
            : Double.parseDouble((String)object);
    } catch (Exception e) {
        throw new JSONException("JSONObject[" + quote(key) +
            "] is not a number.");
    }
}


/**
 * Get the int value associated with a key.
 *
 * @param key   A key string.
 * @return      The integer value.
 * @throws   JSONException if the key is not found or if the value cannot
 *  be converted to an integer.
 */
public int getInt(String key) throws JSONException {
    Object object = this.get(key);
    try {
        return object instanceof Number
            ? ((Number)object).intValue()
            : Integer.parseInt((String)object);
    } catch (Exception e) {
        throw new JSONException("JSONObject[" + quote(key) +
            "] is not an int.");
    }
}


/**
 * Get the JSONArray value associated with a key.
 *
 * @param key   A key string.
 * @return      A JSONArray which is the value.
 * @throws      JSONException if the key is not found or
 *  if the value is not a JSONArray.
 */
public JSONArray getJSONArray(String key) throws JSONException {
    Object object = this.get(key);
    if (object instanceof JSONArray) {
        return (JSONArray)object;
    }
    throw new JSONException("JSONObject[" + quote(key) +
            "] is not a JSONArray.");
}


/**
 * Get the JSONObject value associated with a key.
 *
 * @param key   A key string.
 * @return      A JSONObject which is the value.
 * @throws      JSONException if the key is not found or
 *  if the value is not a JSONObject.
 */
public JSONObject getJSONObject(String key) throws JSONException {
    Object object = this.get(key);
    if (object instanceof JSONObject) {
        return (JSONObject)object;
    }
    throw new JSONException("JSONObject[" + quote(key) +
            "] is not a JSONObject.");
}


/**
 * Get the long value associated with a key.
 *
 * @param key   A key string.
 * @return      The long value.
 * @throws   JSONException if the key is not found or if the value cannot
 *  be converted to a long.
 */
public long getLong(String key) throws JSONException {
    Object object = this.get(key);
    try {
        return object instanceof Number
            ? ((Number)object).longValue()
            : Long.parseLong((String)object);
    } catch (Exception e) {
        throw new JSONException("JSONObject[" + quote(key) +
            "] is not a long.");
    }
}


/**
 * Get an array of field names from a JSONObject.
 *
 * @return An array of field names, or null if there are no names.
 */
public static String[] getNames(JSONObject jo) {
    int length = jo.length();
    if (length == 0) {
        return null;
    }
    Iterator<String> iterator = jo.keys();
    String[] names = new String[length];
    int i = 0;
    while (iterator.hasNext()) {
        names[i] = iterator.next();
        i += 1;
    }
    return names;
}


/**
 * Get an array of field names from an Object.
 *
 * @return An array of field names, or null if there are no names.
 */
public static String[] getNames(Object object) {
    if (object == null) {
        return null;
    }
    Class<?> klass = object.getClass();
    Field[] fields = klass.getFields();
    int length = fields.length;
    if (length == 0) {
        return null;
    }
    String[] names = new String[length];
    for (int i = 0; i < length; i += 1) {
        names[i] = fields[i].getName();
    }
    return names;
}


/**
 * Get the string associated with a key.
 *
 * @param key   A key string.
 * @return      A string which is the value.
 * @throws   JSONException if there is no string value for the key.
 */
public String getString(String key) throws JSONException {
    Object object = this.get(key);
    if (object instanceof String) {
        return (String)object;
    }
    throw new JSONException("JSONObject[" + quote(key) +
        "] not a string.");
}


/**
 * Determine if the JSONObject contains a specific key.
 * @param key   A key string.
 * @return      true if the key exists in the JSONObject.
 */
public boolean has(String key) {
    return this.map.containsKey(key);
}


/**
 * Increment a property of a JSONObject. If there is no such property,
 * create one with a value of 1. If there is such a property, and if
 * it is an Integer, Long, Double, or Float, then add one to it.
 * @param key  A key string.
 * @return this.
 * @throws JSONException If there is already a property with this name
 * that is not an Integer, Long, Double, or Float.
 */
public JSONObject increment(String key) throws JSONException {
    Object value = this.opt(key);
    if (value == null) {
        this.put(key, 1);
    } else if (value instanceof Integer) {
        this.put(key, ((Integer)value).intValue() + 1);
    } else if (value instanceof Long) {
        this.put(key, ((Long)value).longValue() + 1);
    } else if (value instanceof Double) {
        this.put(key, ((Double)value).doubleValue() + 1);
    } else if (value instanceof Float) {
        this.put(key, ((Float)value).floatValue() + 1);
    } else {
        throw new JSONException("Unable to increment [" + quote(key) + "].");
    }
    return this;
}


/**
 * Determine if the value associated with the key is null or if there is
 *  no value.
 * @param key   A key string.
 * @return      true if there is no value associated with the key or if
 *  the value is the JSONObject.NULL object.
 */
public boolean isNull(String key) {
    return JSONObject.NULL.equals(this.opt(key));
}


/**
 * Get an enumeration of the keys of the JSONObject.
 *
 * @return An iterator of the keys.
 */
public Iterator<String> keys() {
    return this.map.keySet().iterator();
}


/**
 * Get the number of keys stored in the JSONObject.
 *
 * @return The number of keys in the JSONObject.
 */
public int length() {
    return this.map.size();
}


/**
 * Produce a JSONArray containing the names of the elements of this
 * JSONObject.
 * @return A JSONArray containing the key strings, or null if the JSONObject
 * is empty.
 */
public JSONArray names() {
    JSONArray ja = new JSONArray();
    Iterator<String>  keys = this.keys();
    while (keys.hasNext()) {
        ja.put(keys.next());
    }
    return ja.length() == 0 ? null : ja;
}

/**
 * Produce a string from a Number.
 * @param  number A Number
 * @return A String.
 * @throws JSONException If n is a non-finite number.
 */
public static String numberToString(Number number)
        throws JSONException {
    if (number == null) {
        throw new JSONException("Null pointer");
    }
    testValidity(number);

    String string = number.toString();
    if (string.indexOf('.') > 0 && string.indexOf('e') < 0 &&
            string.indexOf('E') < 0) {
        while (string.endsWith("0")) {
            string = string.substring(0, string.length() - 1);
        }
        if (string.endsWith(".")) {
            string = string.substring(0, string.length() - 1);
        }
    }
    return string;
}


/**
 * Get an optional value associated with a key.
 * @param key   A key string.
 * @return      An object which is the value, or null if there is no value.
 */
public Object opt(String key) {
    return key == null ? null : this.map.get(key);
}


/**
 * Get an optional boolean associated with a key.
 * It returns false if there is no such key, or if the value is not
 * Boolean.TRUE or the String "true".
 *
 * @param key   A key string.
 * @return      The truth.
 */
public boolean optBoolean(String key) {
    return this.optBoolean(key, false);
}


/**
 * Get an optional boolean associated with a key.
 * It returns the defaultValue if there is no such key, or if it is not
 * a Boolean or the String "true" or "false" (case insensitive).
 *
 * @param key              A key string.
 * @param defaultValue     The default.
 * @return      The truth.
 */
public boolean optBoolean(String key, boolean defaultValue) {
    try {
        return this.getBoolean(key);
    } catch (Exception e) {
        return defaultValue;
    }
}


/**
 * Get an optional double associated with a key,
 * or NaN if there is no such key or if its value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key   A string which is the key.
 * @return      An object which is the value.
 */
public double optDouble(String key) {
    return this.optDouble(key, Double.NaN);
}


/**
 * Get an optional double associated with a key, or the
 * defaultValue if there is no such key or if its value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key   A key string.
 * @param defaultValue     The default.
 * @return      An object which is the value.
 */
public double optDouble(String key, double defaultValue) {
    try {
        return this.getDouble(key);
    } catch (Exception e) {
        return defaultValue;
    }
}


/**
 * Get an optional int value associated with a key,
 * or zero if there is no such key or if the value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key   A key string.
 * @return      An object which is the value.
 */
public int optInt(String key) {
    return this.optInt(key, 0);
}


/**
 * Get an optional int value associated with a key,
 * or the default if there is no such key or if the value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key   A key string.
 * @param defaultValue     The default.
 * @return      An object which is the value.
 */
public int optInt(String key, int defaultValue) {
    try {
        return this.getInt(key);
    } catch (Exception e) {
        return defaultValue;
    }
}


/**
 * Get an optional JSONArray associated with a key.
 * It returns null if there is no such key, or if its value is not a
 * JSONArray.
 *
 * @param key   A key string.
 * @return      A JSONArray which is the value.
 */
public JSONArray optJSONArray(String key) {
    Object o = this.opt(key);
    return o instanceof JSONArray ? (JSONArray)o : null;
}


/**
 * Get an optional JSONObject associated with a key.
 * It returns null if there is no such key, or if its value is not a
 * JSONObject.
 *
 * @param key   A key string.
 * @return      A JSONObject which is the value.
 */
public JSONObject optJSONObject(String key) {
    Object object = this.opt(key);
    return object instanceof JSONObject ? (JSONObject)object : null;
}


/**
 * Get an optional long value associated with a key,
 * or zero if there is no such key or if the value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key   A key string.
 * @return      An object which is the value.
 */
public long optLong(String key) {
    return this.optLong(key, 0);
}


/**
 * Get an optional long value associated with a key,
 * or the default if there is no such key or if the value is not a number.
 * If the value is a string, an attempt will be made to evaluate it as
 * a number.
 *
 * @param key          A key string.
 * @param defaultValue The default.
 * @return             An object which is the value.
 */
public long optLong(String key, long defaultValue) {
    try {
        return this.getLong(key);
    } catch (Exception e) {
        return defaultValue;
    }
}


/**
 * Get an optional string associated with a key.
 * It returns an empty string if there is no such key. If the value is not
 * a string and is not null, then it is converted to a string.
 *
 * @param key   A key string.
 * @return      A string which is the value.
 */
public String optString(String key) {
    return this.optString(key, "");
}


/**
 * Get an optional string associated with a key.
 * It returns the defaultValue if there is no such key.
 *
 * @param key   A key string.
 * @param defaultValue     The default.
 * @return      A string which is the value.
 */
public String optString(String key, String defaultValue) {
    Object object = this.opt(key);
    return NULL.equals(object) ? defaultValue : object.toString();
}


private void populateMap(Object bean) {
    Class<?> klass = bean.getClass();

    boolean includeSuperClass = klass.getClassLoader() != null;

    Method[] methods = includeSuperClass
            ? klass.getMethods()
            : klass.getDeclaredMethods();
    for (int i = 0; i < methods.length; i += 1) {
        try {
            Method method = methods[i];
            if (Modifier.isPublic(method.getModifiers())) {
                String name = method.getName();
                String key = "";
                if (name.startsWith("get")) {
                    if (name.equals("getClass") ||
                            name.equals("getDeclaringClass")) {
                        key = "";
                    } else {
                        key = name.substring(3);
                    }
                } else if (name.startsWith("is")) {
                    key = name.substring(2);
                }
                if (key.length() > 0 &&
                        Character.isUpperCase(key.charAt(0)) &&
                        method.getParameterTypes().length == 0) {
                    if (key.length() == 1) {
                        key = key.toLowerCase();
                    } else if (!Character.isUpperCase(key.charAt(1))) {
                        key = key.substring(0, 1).toLowerCase() +
                            key.substring(1);
                    }

                    Object result = method.invoke(bean, (Object[])null);
                    if (result != null) {
                        this.map.put(key, wrap(result));
                    }
                }
            }
        } catch (Exception ignore) {
        }
    }
}


/**
 * Put a key/boolean pair in the JSONObject.
 *
 * @param key   A key string.
 * @param value A boolean which is the value.
 * @return this.
 * @throws JSONException If the key is null.
 */
public JSONObject put(String key, boolean value) throws JSONException {
    this.put(key, value ? Boolean.TRUE : Boolean.FALSE);
    return this;
}


/**
 * Put a key/value pair in the JSONObject, where the value will be a
 * JSONArray which is produced from a Collection.
 * @param key   A key string.
 * @param value A Collection value.
 * @return      this.
 * @throws JSONException
 */
public JSONObject put(String key, Collection<Object> value) throws JSONException {
    this.put(key, new JSONArray(value));
    return this;
}


/**
 * Put a key/double pair in the JSONObject.
 *
 * @param key   A key string.
 * @param value A double which is the value.
 * @return this.
 * @throws JSONException If the key is null or if the number is invalid.
 */
public JSONObject put(String key, double value) throws JSONException {
    this.put(key, new Double(value));
    return this;
}


/**
 * Put a key/int pair in the JSONObject.
 *
 * @param key   A key string.
 * @param value An int which is the value.
 * @return this.
 * @throws JSONException If the key is null.
 */
public JSONObject put(String key, int value) throws JSONException {
    this.put(key, new Integer(value));
    return this;
}


/**
 * Put a key/long pair in the JSONObject.
 *
 * @param key   A key string.
 * @param value A long which is the value.
 * @return this.
 * @throws JSONException If the key is null.
 */
public JSONObject put(String key, long value) throws JSONException {
    this.put(key, new Long(value));
    return this;
}


/**
 * Put a key/value pair in the JSONObject, where the value will be a
 * JSONObject which is produced from a Map.
 * @param key   A key string.
 * @param value A Map value.
 * @return      this.
 * @throws JSONException
 */
public JSONObject put(String key, Map<String,Object> value) throws JSONException {
    this.put(key, new JSONObject(value));
    return this;
}


/**
 * Put a key/value pair in the JSONObject. If the value is null,
 * then the key will be removed from the JSONObject if it is present.
 * @param key   A key string.
 * @param value An object which is the value. It should be of one of these
 *  types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String,
 *  or the JSONObject.NULL object.
 * @return this.
 * @throws JSONException If the value is non-finite number
 *  or if the key is null.
 */
public JSONObject put(String key, Object value) throws JSONException {
    if (key == null) {
        throw new JSONException("Null key.");
    }
    if (value != null) {
        testValidity(value);
        this.map.put(key, value);
    } else {
        this.remove(key);
    }
    return this;
}


/**
 * Put a key/value pair in the JSONObject, but only if the key and the
 * value are both non-null, and only if there is not already a member
 * with that name.
 * @param key
 * @param value
 * @return his.
 * @throws JSONException if the key is a duplicate
 */
public JSONObject putOnce(String key, Object value) throws JSONException {
    if (key != null && value != null) {
        if (this.opt(key) != null) {
            throw new JSONException("Duplicate key \"" + key + "\"");
        }
        this.put(key, value);
    }
    return this;
}


/**
 * Put a key/value pair in the JSONObject, but only if the
 * key and the value are both non-null.
 * @param key   A key string.
 * @param value An object which is the value. It should be of one of these
 *  types: Boolean, Double, Integer, JSONArray, JSONObject, Long, String,
 *  or the JSONObject.NULL object.
 * @return this.
 * @throws JSONException If the value is a non-finite number.
 */
public JSONObject putOpt(String key, Object value) throws JSONException {
    if (key != null && value != null) {
        this.put(key, value);
    }
    return this;
}


/**
 * Produce a string in double quotes with backslash sequences in all the
 * right places. A backslash will be inserted within </, producing <\/,
 * allowing JSON text to be delivered in HTML. In JSON text, a string
 * cannot contain a control character or an unescaped quote or backslash.
 * @param string A String
 * @return  A String correctly formatted for insertion in a JSON text.
 */
public static String quote(String string) {
    if (string == null || string.length() == 0) {
        return "\"\"";
    }

    char         b;
    char         c = 0;
    String       hhhh;
    int          i;
    int          len = string.length();
    StringBuffer sb = new StringBuffer(len + 4);

    sb.append('"');
    for (i = 0; i < len; i += 1) {
        b = c;
        c = string.charAt(i);
        switch (c) {
        case '\\':
        case '"':
            sb.append('\\');
            sb.append(c);
            break;
        case '/':
            if (b == '<') {
                sb.append('\\');
            }
            sb.append(c);
            break;
        case '\b':
            sb.append("\\b");
            break;
        case '\t':
            sb.append("\\t");
            break;
        case '\n':
            sb.append("\\n");
            break;
        case '\f':
            sb.append("\\f");
            break;
        case '\r':
            sb.append("\\r");
            break;
        default:
            if (c < ' ' || (c >= '\u0080' && c < '\u00a0') ||
                           (c >= '\u2000' && c < '\u2100')) {
                hhhh = "000" + Integer.toHexString(c);
                sb.append("\\u" + hhhh.substring(hhhh.length() - 4));
            } else {
                sb.append(c);
            }
        }
    }
    sb.append('"');
    return sb.toString();
}

/**
 * Remove a name and its value, if present.
 * @param key The name to be removed.
 * @return The value that was associated with the name,
 * or null if there was no value.
 */
public Object remove(String key) {
    return this.map.remove(key);
}

/**
 * Try to convert a string into a number, boolean, or null. If the string
 * can't be converted, return the string.
 * @param string A String.
 * @return A simple JSON value.
 */
public static Object stringToValue(String string) {
    Double d;
    if (string.equals("")) {
        return string;
    }
    if (string.equalsIgnoreCase("true")) {
        return Boolean.TRUE;
    }
    if (string.equalsIgnoreCase("false")) {
        return Boolean.FALSE;
    }
    if (string.equalsIgnoreCase("null")) {
        return JSONObject.NULL;
    }

    /*
     * If it might be a number, try converting it.
     * If a number cannot be produced, then the value will just
     * be a string. Note that the plus and implied string
     * conventions are non-standard. A JSON parser may accept
     * non-JSON forms as long as it accepts all correct JSON forms.
     */

    char b = string.charAt(0);
    if ((b >= '0' && b <= '9') || b == '.' || b == '-' || b == '+') {
        try {
            if (string.indexOf('.') > -1 ||
                    string.indexOf('e') > -1 || string.indexOf('E') > -1) {
                d = Double.valueOf(string);
                if (!d.isInfinite() && !d.isNaN()) {
                    return d;
                }
            } else {
                Long myLong = new Long(string);
                if (myLong.longValue() == myLong.intValue()) {
                    return new Integer(myLong.intValue());
                } else {
                    return myLong;
                }
            }
        }  catch (Exception ignore) {
        }
    }
    return string;
}


/**
 * Throw an exception if the object is a NaN or infinite number.
 * @param o The object to test.
 * @throws JSONException If o is a non-finite number.
 */
public static void testValidity(Object o) throws JSONException {
    if (o != null) {
        if (o instanceof Double) {
            if (((Double)o).isInfinite() || ((Double)o).isNaN()) {
                throw new JSONException(
                    "JSON does not allow non-finite numbers.");
            }
        } else if (o instanceof Float) {
            if (((Float)o).isInfinite() || ((Float)o).isNaN()) {
                throw new JSONException(
                    "JSON does not allow non-finite numbers.");
            }
        }
    }
}


/**
 * Produce a JSONArray containing the values of the members of this
 * JSONObject.
 * @param names A JSONArray containing a list of key strings. This
 * determines the sequence of the values in the result.
 * @return A JSONArray of values.
 * @throws JSONException If any of the values are non-finite numbers.
 */
public JSONArray toJSONArray(JSONArray names) throws JSONException {
    if (names == null || names.length() == 0) {
        return null;
    }
    JSONArray ja = new JSONArray();
    for (int i = 0; i < names.length(); i += 1) {
        ja.put(this.opt(names.getString(i)));
    }
    return ja;
}

/**
 * Make a JSON text of this JSONObject. For compactness, no whitespace
 * is added. If this would not result in a syntactically correct JSON text,
 * then null will be returned instead.
 * <p>
 * Warning: This method assumes that the data structure is acyclical.
 *
 * @return a printable, displayable, portable, transmittable
 *  representation of the object, beginning
 *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
 *  with <code>}</code>&nbsp;<small>(right brace)</small>.
 */
public String toString() {
    try {
        Iterator<String>     keys = this.keys();
        StringBuffer sb = new StringBuffer("{");

        while (keys.hasNext()) {
            if (sb.length() > 1) {
                sb.append(',');
            }
            Object o = keys.next();
            sb.append(quote(o.toString()));
            sb.append(':');
            sb.append(valueToString(this.map.get(o)));
        }
        sb.append('}');
        return sb.toString();
    } catch (Exception e) {
        return null;
    }
}


/**
 * Make a prettyprinted JSON text of this JSONObject.
 * <p>
 * Warning: This method assumes that the data structure is acyclical.
 * @param indentFactor The number of spaces to add to each level of
 *  indentation.
 * @return a printable, displayable, portable, transmittable
 *  representation of the object, beginning
 *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
 *  with <code>}</code>&nbsp;<small>(right brace)</small>.
 * @throws JSONException If the object contains an invalid number.
 */
public String toString(int indentFactor) throws JSONException {
    return this.toString(indentFactor, 0);
}


/**
 * Make a prettyprinted JSON text of this JSONObject.
 * <p>
 * Warning: This method assumes that the data structure is acyclical.
 * @param indentFactor The number of spaces to add to each level of
 *  indentation.
 * @param indent The indentation of the top level.
 * @return a printable, displayable, transmittable
 *  representation of the object, beginning
 *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
 *  with <code>}</code>&nbsp;<small>(right brace)</small>.
 * @throws JSONException If the object contains an invalid number.
 */
String toString(int indentFactor, int indent) throws JSONException {
    int i;
    int length = this.length();
    if (length == 0) {
        return "{}";
    }
    Iterator<String>     keys = this.keys();
    int          newindent = indent + indentFactor;
    Object       object;
    StringBuffer sb = new StringBuffer("{");
    if (length == 1) {
        object = keys.next();
        sb.append(quote(object.toString()));
        sb.append(": ");
        sb.append(valueToString(this.map.get(object), indentFactor,
                indent));
    } else {
        while (keys.hasNext()) {
            object = keys.next();
            if (sb.length() > 1) {
                sb.append(",\n");
            } else {
                sb.append('\n');
            }
            for (i = 0; i < newindent; i += 1) {
                sb.append(' ');
            }
            sb.append(quote(object.toString()));
            sb.append(": ");
            sb.append(valueToString(this.map.get(object), indentFactor,
                    newindent));
        }
        if (sb.length() > 1) {
            sb.append('\n');
            for (i = 0; i < indent; i += 1) {
                sb.append(' ');
            }
        }
    }
    sb.append('}');
    return sb.toString();
}


/**
 * Make a JSON text of an Object value. If the object has an
 * value.toJSONString() method, then that method will be used to produce
 * the JSON text. The method is required to produce a strictly
 * conforming text. If the object does not contain a toJSONString
 * method (which is the most common case), then a text will be
 * produced by other means. If the value is an array or Collection,
 * then a JSONArray will be made from it and its toJSONString method
 * will be called. If the value is a MAP, then a JSONObject will be made
 * from it and its toJSONString method will be called. Otherwise, the
 * value's toString method will be called, and the result will be quoted.
 *
 * <p>
 * Warning: This method assumes that the data structure is acyclical.
 * @param value The value to be serialized.
 * @return a printable, displayable, transmittable
 *  representation of the object, beginning
 *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
 *  with <code>}</code>&nbsp;<small>(right brace)</small>.
 * @throws JSONException If the value is or contains an invalid number.
 */
@SuppressWarnings("unchecked")
public static String valueToString(Object value) throws JSONException {
    if (value == null || value.equals(null)) {
        return "null";
    }
    if (value instanceof JSONString) {
        Object object;
        try {
            object = ((JSONString)value).toJSONString();
        } catch (Exception e) {
            throw new JSONException(e);
        }
        if (object instanceof String) {
            return (String)object;
        }
        throw new JSONException("Bad value from toJSONString: " + object);
    }
    if (value instanceof Number) {
        return numberToString((Number) value);
    }
    if (value instanceof Boolean || value instanceof JSONObject ||
            value instanceof JSONArray) {
        return value.toString();
    }
    if (value instanceof Map) {
        return new JSONObject((Map<String,Object>)value).toString();
    }
    if (value instanceof Collection) {
        return new JSONArray((Collection<Object>)value).toString();
    }
    if (value.getClass().isArray()) {
        return new JSONArray(value).toString();
    }
    return quote(value.toString());
}


/**
 * Make a prettyprinted JSON text of an object value.
 * <p>
 * Warning: This method assumes that the data structure is acyclical.
 * @param value The value to be serialized.
 * @param indentFactor The number of spaces to add to each level of
 *  indentation.
 * @param indent The indentation of the top level.
 * @return a printable, displayable, transmittable
 *  representation of the object, beginning
 *  with <code>{</code>&nbsp;<small>(left brace)</small> and ending
 *  with <code>}</code>&nbsp;<small>(right brace)</small>.
 * @throws JSONException If the object contains an invalid number.
 */
 @SuppressWarnings("unchecked")
static String valueToString(
     Object value,
     int    indentFactor,
     int    indent
 ) throws JSONException {
    if (value == null || value.equals(null)) {
        return "null";
    }
    try {
        if (value instanceof JSONString) {
            Object o = ((JSONString)value).toJSONString();
            if (o instanceof String) {
                return (String)o;
            }
        }
    } catch (Exception ignore) {
    }
    if (value instanceof Number) {
        return numberToString((Number) value);
    }
    if (value instanceof Boolean) {
        return value.toString();
    }
    if (value instanceof JSONObject) {
        return ((JSONObject)value).toString(indentFactor, indent);
    }
    if (value instanceof JSONArray) {
        return ((JSONArray)value).toString(indentFactor, indent);
    }
    if (value instanceof Map) {
        return new JSONObject((Map<String,Object>)value).toString(indentFactor, indent);
    }
    if (value instanceof Collection) {
        return new JSONArray((Collection<Object>)value).toString(indentFactor, indent);
    }
    if (value.getClass().isArray()) {
        return new JSONArray(value).toString(indentFactor, indent);
    }
    return quote(value.toString());
}


 /**
  * Wrap an object, if necessary. If the object is null, return the NULL
  * object. If it is an array or collection, wrap it in a JSONArray. If
  * it is a map, wrap it in a JSONObject. If it is a standard property
  * (Double, String, et al) then it is already wrapped. Otherwise, if it
  * comes from one of the java packages, turn it into a string. And if
  * it doesn't, try to wrap it in a JSONObject. If the wrapping fails,
  * then null is returned.
  *
  * @param object The object to wrap
  * @return The wrapped value
  */
 @SuppressWarnings("unchecked")
public static Object wrap(Object object) {
     try {
         if (object == null) {
             return NULL;
         }
         if (object instanceof JSONObject || object instanceof JSONArray  ||
                 NULL.equals(object)      || object instanceof JSONString ||
                 object instanceof Byte   || object instanceof Character  ||
                 object instanceof Short  || object instanceof Integer    ||
                 object instanceof Long   || object instanceof Boolean    ||
                 object instanceof Float  || object instanceof Double     ||
                 object instanceof String) {
             return object;
         }

         if (object instanceof Collection) {
             return new JSONArray((Collection<Object>)object);
         }
         if (object.getClass().isArray()) {
             return new JSONArray(object);
         }
         if (object instanceof Map) {
             return new JSONObject((Map<String,Object>)object);
         }
         Package objectPackage = object.getClass().getPackage();
         String objectPackageName = objectPackage != null
             ? objectPackage.getName()
             : "";
         if (
             objectPackageName.startsWith("java.") ||
             objectPackageName.startsWith("javax.") ||
             object.getClass().getClassLoader() == null
         ) {
             return object.toString();
         }
         return new JSONObject(object);
     } catch(Exception exception) {
         return null;
     }
 }


 /**
  * Write the contents of the JSONObject as JSON text to a writer.
  * For compactness, no whitespace is added.
  * <p>
  * Warning: This method assumes that the data structure is acyclical.
  *
  * @return The writer.
  * @throws JSONException
  */
 public Writer write(Writer writer) throws JSONException {
    try {
        boolean  commanate = false;
        Iterator<String> keys = this.keys();
        writer.write('{');

        while (keys.hasNext()) {
            if (commanate) {
                writer.write(',');
            }
            Object key = keys.next();
            writer.write(quote(key.toString()));
            writer.write(':');
            Object value = this.map.get(key);
            if (value instanceof JSONObject) {
                ((JSONObject)value).write(writer);
            } else if (value instanceof JSONArray) {
                ((JSONArray)value).write(writer);
            } else {
                writer.write(valueToString(value));
            }
            commanate = true;
        }
        writer.write('}');
        return writer;
    } catch (IOException exception) {
        throw new JSONException(exception);
    }
 }