JSONArray (Spring Boot 2.3.0.M3 API)

java.lang.Object
- org.springframework.boot.configurationprocessor.json.JSONArray

```
public class JSONArray
extends Object
```
A dense indexed sequence of values. Values may be any mix of JSONObjects, other JSONArrays, Strings, Booleans, Integers, Longs, Doubles, null or JSONObject.NULL. Values may not be NaNs, infinities, or of any type not listed here.
JSONArray has the same type coercion behavior and optional/mandatory accessors as JSONObject. See that class' documentation for details.
Warning: this class represents null in two incompatible ways: the standard Java null reference, and the sentinel value JSONObject.NULL. In particular, get fails if the requested index holds the null reference, but succeeds if it holds JSONObject.NULL.
Instances of this class are not thread safe. Although this class is nonfinal, it was not designed for inheritance and should not be subclassed. In particular, self-use by overridable methods is not specified. See Effective Java Item 17, "Design and Document or inheritance or else prohibit it" for further information.

Constructor Summary

Constructors
Constructor and Description
`JSONArray()` Creates a `JSONArray` with no values.
`JSONArray(Collection copyFrom)` Creates a new `JSONArray` by copying all values from the given collection.
`JSONArray(JSONTokener readFrom)` Creates a new `JSONArray` with values from the next array in the tokener.
`JSONArray(Object array)` Creates a new `JSONArray` with values from the given primitive array.
`JSONArray(String json)` Creates a new `JSONArray` with values from the JSON string.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`equals(Object o)`
`Object`	`get(int index)` Returns the value at `index`.
`boolean`	`getBoolean(int index)` Returns the value at `index` if it exists and is a boolean or can be coerced to a boolean.
`double`	`getDouble(int index)` Returns the value at `index` if it exists and is a double or can be coerced to a double.
`int`	`getInt(int index)` Returns the value at `index` if it exists and is an int or can be coerced to an int.
`JSONArray`	`getJSONArray(int index)` Returns the value at `index` if it exists and is a `JSONArray`.
`JSONObject`	`getJSONObject(int index)` Returns the value at `index` if it exists and is a `JSONObject`.
`long`	`getLong(int index)` Returns the value at `index` if it exists and is a long or can be coerced to a long.
`String`	`getString(int index)` Returns the value at `index` if it exists, coercing it if necessary.
`int`	`hashCode()`
`boolean`	`isNull(int index)` Returns true if this array has no value at `index`, or if its value is the `null` reference or `JSONObject.NULL`.
`String`	`join(String separator)` Returns a new string by alternating this array's values with `separator`.
`int`	`length()` Returns the number of values in this array.
`Object`	`opt(int index)` Returns the value at `index`, or null if the array has no value at `index`.
`boolean`	`optBoolean(int index)` Returns the value at `index` if it exists and is a boolean or can be coerced to a boolean.
`boolean`	`optBoolean(int index, boolean fallback)` Returns the value at `index` if it exists and is a boolean or can be coerced to a boolean.
`double`	`optDouble(int index)` Returns the value at `index` if it exists and is a double or can be coerced to a double.
`double`	`optDouble(int index, double fallback)` Returns the value at `index` if it exists and is a double or can be coerced to a double.
`int`	`optInt(int index)` Returns the value at `index` if it exists and is an int or can be coerced to an int.
`int`	`optInt(int index, int fallback)` Returns the value at `index` if it exists and is an int or can be coerced to an int.
`JSONArray`	`optJSONArray(int index)` Returns the value at `index` if it exists and is a `JSONArray`.
`JSONObject`	`optJSONObject(int index)` Returns the value at `index` if it exists and is a `JSONObject`.
`long`	`optLong(int index)` Returns the value at `index` if it exists and is a long or can be coerced to a long.
`long`	`optLong(int index, long fallback)` Returns the value at `index` if it exists and is a long or can be coerced to a long.
`String`	`optString(int index)` Returns the value at `index` if it exists, coercing it if necessary.
`String`	`optString(int index, String fallback)` Returns the value at `index` if it exists, coercing it if necessary.
`JSONArray`	`put(boolean value)` Appends `value` to the end of this array.
`JSONArray`	`put(double value)` Appends `value` to the end of this array.
`JSONArray`	`put(int value)` Appends `value` to the end of this array.
`JSONArray`	`put(int index, boolean value)` Sets the value at `index` to `value`, null padding this array to the required length if necessary.
`JSONArray`	`put(int index, double value)` Sets the value at `index` to `value`, null padding this array to the required length if necessary.
`JSONArray`	`put(int index, int value)` Sets the value at `index` to `value`, null padding this array to the required length if necessary.
`JSONArray`	`put(int index, long value)` Sets the value at `index` to `value`, null padding this array to the required length if necessary.
`JSONArray`	`put(int index, Object value)` Sets the value at `index` to `value`, null padding this array to the required length if necessary.
`JSONArray`	`put(long value)` Appends `value` to the end of this array.
`JSONArray`	`put(Object value)` Appends `value` to the end of this array.
`Object`	`remove(int index)` Removes and returns the value at `index`, or null if the array has no value at `index`.
`JSONObject`	`toJSONObject(JSONArray names)` Returns a new object whose values are the values in this array, and whose names are the values in `names`.
`String`	`toString()` Encodes this array as a compact JSON string, such as:
`String`	`toString(int indentSpaces)` Encodes this array as a human readable JSON string for debugging, such as:

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - JSONArray
```
public JSONArray()
```
    Creates a JSONArray with no values.
  - JSONArray
```
public JSONArray(Collection copyFrom)
```
    Creates a new JSONArray by copying all values from the given collection.
    
    Parameters:
    
    copyFrom - a collection whose values are of supported types. Unsupported values are not permitted and will yield an array in an inconsistent state.
  - JSONArray
```
public JSONArray(JSONTokener readFrom)
          throws JSONException
```
    Creates a new JSONArray with values from the next array in the tokener.
    
    Parameters:
    
    readFrom - a tokener whose nextValue() method will yield a JSONArray.
    
    Throws:
    
    JSONException - if the parse fails or doesn't yield a JSONArray.
    
    JSONException - if processing of json failed
  - JSONArray
```
public JSONArray(String json)
          throws JSONException
```
    Creates a new JSONArray with values from the JSON string.
    
    Parameters:
    
    json - a JSON-encoded string containing an array.
    
    Throws:
    
    JSONException - if the parse fails or doesn't yield a JSONArray.
  - JSONArray
```
public JSONArray(Object array)
          throws JSONException
```
    Creates a new JSONArray with values from the given primitive array.
    
    Parameters:
    
    array - a primitive array
    
    Throws:
    
    JSONException - if processing of json failed
- Method Detail
  - length
```
public int length()
```
    Returns the number of values in this array.
    
    Returns:
    
    the length of this array
  - put
```
public JSONArray put(boolean value)
```
    Appends value to the end of this array.
    
    Parameters:
    
    value - the value
    
    Returns:
    
    this array.
  - put
```
public JSONArray put(double value)
              throws JSONException
```
    Appends value to the end of this array.
    
    Parameters:
    
    value - a finite value. May not be NaNs or infinities.
    
    Returns:
    
    this array.
    
    Throws:
    
    JSONException - if processing of json failed
  - put
```
public JSONArray put(int value)
```
    Appends value to the end of this array.
    
    Parameters:
    
    value - the value
    
    Returns:
    
    this array.
  - put
```
public JSONArray put(long value)
```
    Appends value to the end of this array.
    
    Parameters:
    
    value - the value
    
    Returns:
    
    this array.
  - put
```
public JSONArray put(Object value)
```
    Appends value to the end of this array.
    
    Parameters:
    
    value - a JSONObject, JSONArray, String, Boolean, Integer, Long, Double, JSONObject.NULL, or null. May not be NaNs or infinities. Unsupported values are not permitted and will cause the array to be in an inconsistent state.
    
    Returns:
    
    this array.
  - put
```
public JSONArray put(int index,
                     boolean value)
              throws JSONException
```
    Sets the value at index to value, null padding this array to the required length if necessary. If a value already exists at index, it will be replaced.
    
    Parameters:
    
    index - the index to set the value to
    
    value - the value
    
    Returns:
    
    this array.
    
    Throws:
    
    JSONException - if processing of json failed
  - put
```
public JSONArray put(int index,
                     double value)
              throws JSONException
```
    Sets the value at index to value, null padding this array to the required length if necessary. If a value already exists at index, it will be replaced.
    
    Parameters:
    
    index - the index to set the value to
    
    value - a finite value. May not be NaNs or infinities.
    
    Returns:
    
    this array.
    
    Throws:
    
    JSONException - if processing of json failed
  - put
```
public JSONArray put(int index,
                     int value)
              throws JSONException
```
    Sets the value at index to value, null padding this array to the required length if necessary. If a value already exists at index, it will be replaced.
    
    Parameters:
    
    index - the index to set the value to
    
    value - the value
    
    Returns:
    
    this array.
    
    Throws:
    
    JSONException - if processing of json failed
  - put
```
public JSONArray put(int index,
                     long value)
              throws JSONException
```
    Sets the value at index to value, null padding this array to the required length if necessary. If a value already exists at index, it will be replaced.
    
    Parameters:
    
    index - the index to set the value to
    
    value - the value
    
    Returns:
    
    this array.
    
    Throws:
    
    JSONException - if processing of json failed
  - put
```
public JSONArray put(int index,
                     Object value)
              throws JSONException
```
    Sets the value at index to value, null padding this array to the required length if necessary. If a value already exists at index, it will be replaced.
    
    Parameters:
    
    index - the index to set the value to
    
    value - a JSONObject, JSONArray, String, Boolean, Integer, Long, Double, JSONObject.NULL, or null. May not be NaNs or infinities.
    
    Returns:
    
    this array.
    
    Throws:
    
    JSONException - if processing of json failed
  - isNull
```
public boolean isNull(int index)
```
    Returns true if this array has no value at index, or if its value is the null reference or JSONObject.NULL.
    
    Parameters:
    
    index - the index to set the value to
    
    Returns:
    
    true if this array has no value at index
  - get
```
public Object get(int index)
           throws JSONException
```
    Returns the value at index.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value at index.
    
    Throws:
    
    JSONException - if this array has no value at index, or if that value is the null reference. This method returns normally if the value is JSONObject#NULL.
  - opt
```
public Object opt(int index)
```
    Returns the value at index, or null if the array has no value at index.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value at index or null
  - remove
```
public Object remove(int index)
```
    Removes and returns the value at index, or null if the array has no value at index.
    
    Parameters:
    
    index - the index of the value to remove
    
    Returns:
    
    the previous value at index
  - getBoolean
```
public boolean getBoolean(int index)
                   throws JSONException
```
    Returns the value at index if it exists and is a boolean or can be coerced to a boolean.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value at index
    
    Throws:
    
    JSONException - if the value at index doesn't exist or cannot be coerced to a boolean.
  - optBoolean
```
public boolean optBoolean(int index)
```
    Returns the value at index if it exists and is a boolean or can be coerced to a boolean. Returns false otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value or false
  - optBoolean
```
public boolean optBoolean(int index,
                          boolean fallback)
```
    Returns the value at index if it exists and is a boolean or can be coerced to a boolean. Returns fallback otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    fallback - the fallback value
    
    Returns:
    
    the value at index of fallback
  - getDouble
```
public double getDouble(int index)
                 throws JSONException
```
    Returns the value at index if it exists and is a double or can be coerced to a double.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value
    
    Throws:
    
    JSONException - if the value at index doesn't exist or cannot be coerced to a double.
  - optDouble
```
public double optDouble(int index)
```
    Returns the value at index if it exists and is a double or can be coerced to a double. Returns NaN otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value or NaN
  - optDouble
```
public double optDouble(int index,
                        double fallback)
```
    Returns the value at index if it exists and is a double or can be coerced to a double. Returns fallback otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    fallback - the fallback value
    
    Returns:
    
    the value at index of fallback
  - getInt
```
public int getInt(int index)
           throws JSONException
```
    Returns the value at index if it exists and is an int or can be coerced to an int.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value
    
    Throws:
    
    JSONException - if the value at index doesn't exist or cannot be coerced to an int.
  - optInt
```
public int optInt(int index)
```
    Returns the value at index if it exists and is an int or can be coerced to an int. Returns 0 otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value or 0
  - optInt
```
public int optInt(int index,
                  int fallback)
```
    Returns the value at index if it exists and is an int or can be coerced to an int. Returns fallback otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    fallback - the fallback value
    
    Returns:
    
    the value at index of fallback
  - getLong
```
public long getLong(int index)
             throws JSONException
```
    Returns the value at index if it exists and is a long or can be coerced to a long.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value
    
    Throws:
    
    JSONException - if the value at index doesn't exist or cannot be coerced to a long.
  - optLong
```
public long optLong(int index)
```
    Returns the value at index if it exists and is a long or can be coerced to a long. Returns 0 otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value or 0
  - optLong
```
public long optLong(int index,
                    long fallback)
```
    Returns the value at index if it exists and is a long or can be coerced to a long. Returns fallback otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    fallback - the fallback value
    
    Returns:
    
    the value at index of fallback
  - getString
```
public String getString(int index)
                 throws JSONException
```
    Returns the value at index if it exists, coercing it if necessary.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value
    
    Throws:
    
    JSONException - if no such value exists.
  - optString
```
public String optString(int index)
```
    Returns the value at index if it exists, coercing it if necessary. Returns the empty string if no such value exists.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the value or an empty string
  - optString
```
public String optString(int index,
                        String fallback)
```
    Returns the value at index if it exists, coercing it if necessary. Returns fallback if no such value exists.
    
    Parameters:
    
    index - the index to get the value from
    
    fallback - the fallback value
    
    Returns:
    
    the value at index of fallback
  - getJSONArray
```
public JSONArray getJSONArray(int index)
                       throws JSONException
```
    Returns the value at index if it exists and is a JSONArray.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the array at index
    
    Throws:
    
    JSONException - if the value doesn't exist or is not a JSONArray.
  - optJSONArray
```
public JSONArray optJSONArray(int index)
```
    Returns the value at index if it exists and is a JSONArray. Returns null otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the array at index or null
  - getJSONObject
```
public JSONObject getJSONObject(int index)
                         throws JSONException
```
    Returns the value at index if it exists and is a JSONObject.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the object at index
    
    Throws:
    
    JSONException - if the value doesn't exist or is not a JSONObject.
  - optJSONObject
```
public JSONObject optJSONObject(int index)
```
    Returns the value at index if it exists and is a JSONObject. Returns null otherwise.
    
    Parameters:
    
    index - the index to get the value from
    
    Returns:
    
    the object at index or null
  - toJSONObject
```
public JSONObject toJSONObject(JSONArray names)
                        throws JSONException
```
    Returns a new object whose values are the values in this array, and whose names are the values in names. Names and values are paired up by index from 0 through to the shorter array's length. Names that are not strings will be coerced to strings. This method returns null if either array is empty.
    
    Parameters:
    
    names - the property names
    
    Returns:
    
    a json object
    
    Throws:
    
    JSONException - if processing of json failed
  - join
```
public String join(String separator)
            throws JSONException
```
    Returns a new string by alternating this array's values with separator. This array's string values are quoted and have their special characters escaped. For example, the array containing the strings '12" pizza', 'taco' and 'soda' joined on '+' returns this:
```
"12\" pizza"+"taco"+"soda"
```
    Parameters:
    
    separator - the separator to use
    
    Returns:
    
    the joined value
    
    Throws:
    
    JSONException - if processing of json failed
  - toString
```
public String toString()
```
    Encodes this array as a compact JSON string, such as:
```
[94043,90210]
```
    Overrides:
    
    toString in class Object
    
    Returns:
    
    a compact JSON string representation of this array
  - toString
```
public String toString(int indentSpaces)
                throws JSONException
```
    Encodes this array as a human readable JSON string for debugging, such as:
```
 [
     94043,
     90210
 ]
```
    Parameters:
    
    indentSpaces - the number of spaces to indent for each level of nesting.
    
    Returns:
    
    a human readable JSON string of this array
    
    Throws:
    
    JSONException - if processing of json failed
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object

Class JSONArray

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

JSONArray

JSONArray

JSONArray

JSONArray

JSONArray

Method Detail

length

put

put

put

put

put

put

put

put

put

put

isNull

get

opt

remove

getBoolean

optBoolean

optBoolean

getDouble

optDouble

optDouble

getInt

optInt

optInt

getLong

optLong

optLong

getString

optString

optString

getJSONArray

optJSONArray

getJSONObject

optJSONObject

toJSONObject

join

toString

toString

equals

hashCode