com.google.common.collect
Class PrimitiveArrays

java.lang.Object
  com.google.common.collect.PrimitiveArrays

public final class PrimitiveArrays
extends Object

Static utility methods pertaining to arrays of Java primitives.

Author:

DJ Lee, Michael Parker

Method Summary

static List<Boolean>	asList(boolean[] backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...).
static List<Byte>	asList(byte[] backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...).
static List<Character>	asList(char[] backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...).
static List<Double>	asList(double[] backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...).
static List<Float>	asList(float[] backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...).
static List<Integer>	asList(int[] backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...).
static List<Long>	asList(long[] backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...).
static List<Short>	asList(short[] backingArray) Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...).
static boolean[]	toBooleanArray(Collection<Boolean> collection) Converts a Collection of Boolean instances (wrapper objects) into a new array of primitive booleans.
static byte[]	toByteArray(Collection<Byte> collection) Converts a Collection of Byte instances (wrapper objects) into a new array of primitive bytes.
static char[]	toCharArray(Collection<Character> collection) Converts a Collection of Character instances (wrapper objects) into a new array of primitive chars.
static double[]	toDoubleArray(Collection<Double> collection) Converts a Collection of Double instances (wrapper objects) into a new array of primitive doubles.
static float[]	toFloatArray(Collection<Float> collection) Converts a Collection of Float instances (wrapper objects) into a new array of primitive floats.
static int[]	toIntArray(Collection<Integer> collection) Converts a Collection of Integer instances (wrapper objects) into a new array of primitive ints.
static long[]	toLongArray(Collection<Long> collection) Converts a Collection of Long instances (wrapper objects) into a new array of primitive longs.
static short[]	toShortArray(Collection<Short> collection) Converts a Collection of Short instances (wrapper objects) into a new array of primitive shorts.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

toShortArray

public static short[] toShortArray(Collection<Short> collection)

Converts a Collection of Short instances (wrapper objects) into a new array of primitive shorts.

Parameters:

collection - a Collection of Shorts.

Returns:

an array containing the same shorts as collection, in the same order, converted to primitives.

asList

public static List<Short> asList(short[] backingArray)

Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...). The only additional restriction of the returned list is that null cannot be assigned to any element via List.set(int,Object).

Parameters:

backingArray - the array to back the list

Returns:

a list view of the array

toIntArray

public static int[] toIntArray(Collection<Integer> collection)

Converts a Collection of Integer instances (wrapper objects) into a new array of primitive ints.

Parameters:

collection - a Collection of Integers.

Returns:

an array containing the same ints as collection, in the same order, converted to primitives.

asList

public static List<Integer> asList(int[] backingArray)

Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...). The only additional restriction of the returned list is that null cannot be assigned to any element via List.set(int,Object).

Parameters:

backingArray - the array to back the list

Returns:

a list view of the array

toDoubleArray

public static double[] toDoubleArray(Collection<Double> collection)

Converts a Collection of Double instances (wrapper objects) into a new array of primitive doubles.

Parameters:

collection - a Collection of Doubles.

Returns:

an array containing the same doubles as collection, in the same order, converted to primitives.

asList

public static List<Double> asList(double[] backingArray)

Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...). The only additional restriction of the returned list is that null cannot be assigned to any element via List.set(int,Object).

Parameters:

backingArray - the array to back the list

Returns:

a list view of the array

toFloatArray

public static float[] toFloatArray(Collection<Float> collection)

Converts a Collection of Float instances (wrapper objects) into a new array of primitive floats.

Parameters:

collection - a Collection of Floats.

Returns:

an array containing the same floats as collection, in the same order, converted to primitives.

asList

public static List<Float> asList(float[] backingArray)

Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...). The only additional restriction of the returned list is that null cannot be assigned to any element via List.set(int,Object).

Parameters:

backingArray - the array to back the list

Returns:

a list view of the array

toLongArray

public static long[] toLongArray(Collection<Long> collection)

Converts a Collection of Long instances (wrapper objects) into a new array of primitive longs.

Parameters:

collection - a Collection of Longs.

Returns:

an array containing the same longs as collection, in the same order, converted to primitives.

asList

public static List<Long> asList(long[] backingArray)

Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...). The only additional restriction of the returned list is that null cannot be assigned to any element via List.set(int,Object).

Parameters:

backingArray - the array to back the list

Returns:

a list view of the array

toCharArray

public static char[] toCharArray(Collection<Character> collection)

Converts a Collection of Character instances (wrapper objects) into a new array of primitive chars.

Parameters:

collection - a Collection of Characters.

Returns:

an array containing the same chars as collection, in the same order, converted to primitives.

asList

public static List<Character> asList(char[] backingArray)

Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...). The only additional restriction of the returned list is that null cannot be assigned to any element via List.set(int,Object).

Parameters:

backingArray - the array to back the list

Returns:

a list view of the array

toBooleanArray

public static boolean[] toBooleanArray(Collection<Boolean> collection)

Converts a Collection of Boolean instances (wrapper objects) into a new array of primitive booleans.

Parameters:

collection - a Collection of Booleans.

Returns:

an array containing the same booleans as collection, in the same order, converted to primitives.

asList

public static List<Boolean> asList(boolean[] backingArray)

Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...). The only additional restriction of the returned list is that null cannot be assigned to any element via List.set(int,Object).

Parameters:

backingArray - the array to back the list

Returns:

a list view of the array

toByteArray

public static byte[] toByteArray(Collection<Byte> collection)

Converts a Collection of Byte instances (wrapper objects) into a new array of primitive bytes.

Parameters:

collection - a Collection of Bytes.

Returns:

an array containing the same bytes as collection, in the same order, converted to primitives.

asList

public static List<Byte> asList(byte[] backingArray)

Returns a fixed-size list backed by the specified array, similar to Arrays.asList(T...). The only additional restriction of the returned list is that null cannot be assigned to any element via List.set(int,Object).

Parameters:

backingArray - the array to back the list

Returns:

a list view of the array