public class SparseArray extends Object
Constructor and Description |
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SparseArray()
Creates a new SparseArray containing no mappings.
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SparseArray(int initialCapacity)
Creates a new SparseArray containing no mappings that will not
require any additional memory allocation to store the specified
number of mappings.
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Modifier and Type | Method and Description |
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void |
append(int key,
Double value)
Puts a key/value pair into the array, optimizing for the case where
the key is greater than all existing keys in the array.
|
void |
clear()
Removes all key-value mappings from this SparseArray.
|
SparseArray |
clone() |
void |
delete(int key)
Removes the mapping from the specified key, if there was any.
|
Double |
get(int key)
Gets the Object mapped from the specified key, or
null
if no such mapping has been made. |
Double |
get(int key,
Double valueIfKeyNotFound)
Gets the Object mapped from the specified key, or the specified Object
if no such mapping has been made.
|
int[] |
getKeys() |
String |
getKeysString() |
static int |
idealIntArraySize(int need) |
int |
indexOfKey(int key)
Returns the index for which
keyAt(int) would return the
specified key, or a negative number if the specified
key is not mapped. |
int |
indexOfValue(Double value)
Returns an index for which
valueAt(int) would return the
specified key, or a negative number if no keys map to the
specified value. |
int |
keyAt(int index)
Given an index in the range
0...size()-1 , returns
the key from the index th key-value mapping that this
SparseArray stores. |
void |
put(int key,
Double value)
Adds a mapping from the specified key to the specified value,
replacing the previous mapping from the specified key if there
was one.
|
void |
remove(int key)
Alias for
delete(int) . |
void |
setValueAt(int index,
Double value)
Given an index in the range
0...size()-1 , sets a new
value for the index th key-value mapping that this
SparseArray stores. |
int |
size()
Returns the number of key-value mappings that this SparseArray
currently stores.
|
Double |
valueAt(int index)
Given an index in the range
0...size()-1 , returns
the value from the index th key-value mapping that this
SparseArray stores. |
public SparseArray()
public SparseArray(int initialCapacity)
public Double get(int key)
null
if no such mapping has been made.public Double get(int key, Double valueIfKeyNotFound)
public void delete(int key)
public void remove(int key)
delete(int)
.public void put(int key, Double value)
public int size()
public int keyAt(int index)
0...size()-1
, returns
the key from the index
th key-value mapping that this
SparseArray stores.public Double valueAt(int index)
0...size()-1
, returns
the value from the index
th key-value mapping that this
SparseArray stores.public void setValueAt(int index, Double value)
0...size()-1
, sets a new
value for the index
th key-value mapping that this
SparseArray stores.public int indexOfKey(int key)
keyAt(int)
would return the
specified key, or a negative number if the specified
key is not mapped.public int indexOfValue(Double value)
valueAt(int)
would return the
specified key, or a negative number if no keys map to the
specified value.
Beware that this is a linear search, unlike lookups by key,
and that multiple keys can map to the same value and this will
find only one of them.public void clear()
public static int idealIntArraySize(int need)
public void append(int key, Double value)
public String getKeysString()
public int[] getKeys()
public SparseArray clone()
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