Package utilities.util
Class ArrayUtilities
- java.lang.Object
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- utilities.util.ArrayUtilities
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public final class ArrayUtilities extends java.lang.Object
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Constructor Summary
Constructors Constructor Description ArrayUtilities()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static boolean
arrayRangesEquals(byte[] b1, int start_b1, byte[] b2, int start_b2, int len)
Returns true if a portion of byte array b1 equals an equally sized portion of byte array b2.static int
compare(byte[] a, byte[] b)
Compare two byte arrays by their corresponding entries If the two arrays have differing lengths, the shorter precedes the longer.static <T> T[]
copyAndAppend(T[] array, T element)
Returns a copy of the given array with the provided element appended.static boolean
isArrayPrimativeEqual(java.lang.Object o1, java.lang.Object o2)
Compares two primitive arrays for equalitystatic byte[]
reverse(byte[] array)
Returns a new copy of the specified bytearray
with the elements in reversed order.
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Method Detail
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reverse
public static byte[] reverse(byte[] array)
Returns a new copy of the specified bytearray
with the elements in reversed order.- Parameters:
array
- byte array to reverse- Returns:
- new array instance with elements in reverse order
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isArrayPrimativeEqual
public static boolean isArrayPrimativeEqual(java.lang.Object o1, java.lang.Object o2)
Compares two primitive arrays for equality- Parameters:
o1
- the first arrayo2
- the second array- Returns:
- true if each element of the array is equal
- Throws:
java.lang.IllegalArgumentException
- if either argument is not an array
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arrayRangesEquals
public static boolean arrayRangesEquals(byte[] b1, int start_b1, byte[] b2, int start_b2, int len)
Returns true if a portion of byte array b1 equals an equally sized portion of byte array b2.If the sizes of b1 or b2 do not allow for a full comparison of
len
bytes, this function will return false.- Parameters:
b1
- first byte arraystart_b1
- offset to start comparison in b1b2
- second byte arraystart_b2
- offset to start comparison in b2len
- number of bytes to compare- Returns:
- true or false if the portion is equal
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copyAndAppend
public static <T> T[] copyAndAppend(T[] array, T element)
Returns a copy of the given array with the provided element appended. The length of the returned array will be one element greater than the given array.- Parameters:
array
- The array to copy.element
- The element to append to the copy.- Returns:
- A copy of the given array with the provided element appended.
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compare
public static int compare(byte[] a, byte[] b)
Compare two byte arrays by their corresponding entries If the two arrays have differing lengths, the shorter precedes the longer. Otherwise, they are compared as in C'smemcmp
, except that Javabyte
s are signed.- Parameters:
a
- the first arrayb
- the second array- Returns:
- a comparison result as in
Comparable.compareTo(Object)
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