danger.util
Class ArrayUtils

java.lang.Object
  danger.util.ArrayUtils

public final class ArrayUtils
extends Object

Generic array utilities.

Method Summary

static List<Integer>	asList(int[] a) List adapter for primitive int array.
static <T> T[]	extractUnique(T[] array) Filter duplicates out of an array.
static int	idealByteArrayLength(int minSize) Return the "ideal length" for a byte[] that must be at least the given number of elements in length.
static int	idealCharArrayLength(int minSize) Return the "ideal length" for a char[] that must be at least the given number of elements in length.
static int	idealIntArrayLength(int minSize) Return the "ideal length" for an int[] that must be at least the given number of elements in length.
static int	idealLongArrayLength(int minSize) Return the "ideal length" for a long[] that must be at least the given number of elements in length.
static int	idealObjectArrayLength(int minSize) Return the "ideal length" for an Object[] (or subclass thereof) that must be at least the given number of elements in length.
static int	idealShortArrayLength(int minSize) Return the "ideal length" for a short[] that must be at least the given number of elements in length.
static int	lowerIdealByteArrayLength(int minSize) Return the portion of a byte[] of the specified size that would fit into an ideal-sized array.
static int[]	toArray(Collection<Integer> c) Convert an Integer collection to an int[].

Methods inherited from class java.lang.Object

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

Method Detail

extractUnique

public static <T> T[] extractUnique(T[] array)

Filter duplicates out of an array.

Since:

4.0

asList

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

List adapter for primitive int array. Modified from http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4348595

Since:

4.0

See Also:

java.util.Arrays.asList(T...)

toArray

public static int[] toArray(Collection<Integer> c)

Convert an Integer collection to an int[].

Since:

4.0

See Also:

java.util.Collection.toArray(T[])

idealByteArrayLength

public static int idealByteArrayLength(int minSize)

Return the "ideal length" for a byte[] that must be at least the given number of elements in length. This takes into account the underlying allocation strategy.

Parameters:

minSize - the minimum length of the array

Returns:

the ideal length for the array

idealCharArrayLength

public static int idealCharArrayLength(int minSize)

Return the "ideal length" for a char[] that must be at least the given number of elements in length. This takes into account the underlying allocation strategy.

Parameters:

minSize - the minimum length of the array

Returns:

the ideal length for the array

idealShortArrayLength

public static int idealShortArrayLength(int minSize)

Return the "ideal length" for a short[] that must be at least the given number of elements in length. This takes into account the underlying allocation strategy.

Parameters:

minSize - the minimum length of the array

Returns:

the ideal length for the array

idealIntArrayLength

public static int idealIntArrayLength(int minSize)

Return the "ideal length" for an int[] that must be at least the given number of elements in length. This takes into account the underlying allocation strategy.

Parameters:

minSize - the minimum length of the array

Returns:

the ideal length for the array

idealLongArrayLength

public static int idealLongArrayLength(int minSize)

Return the "ideal length" for a long[] that must be at least the given number of elements in length. This takes into account the underlying allocation strategy.

Parameters:

minSize - the minimum length of the array

Returns:

the ideal length for the array

idealObjectArrayLength

public static int idealObjectArrayLength(int minSize)

Return the "ideal length" for an Object[] (or subclass thereof) that must be at least the given number of elements in length. This takes into account the underlying allocation strategy.

Parameters:

minSize - the minimum length of the array

Returns:

the ideal length for the array

lowerIdealByteArrayLength

public static int lowerIdealByteArrayLength(int minSize)

Return the portion of a byte[] of the specified size that would fit into an ideal-sized array.

Parameters:

minSize - the preferred length of the array

Returns:

the length for the array that would fit