Package org.zkoss.util

Class ArraysX

java.lang.Object

org.zkoss.util.ArraysX

public class ArraysX
extends java.lang.Object

Utilities for handling arrays.

Author:

henrichen

Constructor Summary

Constructors

Constructor	Description
ArraysX()

Method Summary

Modifier and Type	Method	Description
static java.util.List<java.lang.Object>	asBoxedList(java.lang.Object primitiveArray)	Returns a fixed-size boxed list backed by the specified primitive array.
static <T> java.util.List<T>	asList(T[] ary)	Returns a mutable list.
static <T> java.util.List<java.util.List<T>>	asList(T[][] ary)	Returns a two dimensional mutable list.
static java.lang.Object	concat(java.lang.Object ary, java.lang.Object ary1)	Concatenates the two specified array.
static <T> T[]	concat(T[] ary, T[] ary1)	Concatenates the two specified generic array.
static java.lang.Object	duplicate(java.lang.Object ary)	Duplicates the specified array.
static java.lang.Object	duplicate(java.lang.Object ary, int jb, int je)	Duplicates the specified array.
static <T> T[]	duplicate(T[] ary)	Duplicates the specified generic array.
static <T> T[]	duplicate(T[] ary, int jb, int je)	Duplicates the specified generic array.
static java.lang.Object	resize(java.lang.Object ary, int size)	Resizes the specified array.
static <T> T[]	resize(T[] ary, int size)	Resizes the specified generic array.
static java.lang.Object	shrink(java.lang.Object ary, int jb, int je)	Shrink the specified array.
static <T> T[]	shrink(T[] ary, int jb, int je)	Shrink the specified array.
static java.lang.String	toHexString(byte[] array)	Returns the hex String representation of a byte array without prefix 0x.
static java.lang.String	toOctalString(byte[] array, java.lang.String prefix)	Returns the octal String representation of a byte array with optional prefix.
static java.lang.String	toString(boolean[] array)	Converts an array of boolean to a readable string (for debugging purpose).
static java.lang.String	toString(byte[] array)	Converts an array of byte to a readable string (for debugging purpose).
static java.lang.String	toString(char[] array)	Converts an array of char to a readable string (for debugging purpose).
static java.lang.String	toString(double[] array)	Converts an array of char to a readable string (for debugging purpose).
static java.lang.String	toString(float[] array)	Converts an array of float to a readable string (for debugging purpose).
static java.lang.String	toString(int[] array)	Converts an array of int to a readable string (for debugging purpose).
static java.lang.String	toString(long[] array)	Converts an array of long to a readable string (for debugging purpose).
static java.lang.String	toString(short[] array)	Converts an array of short to a readable string (for debugging purpose).
static java.lang.String	toString(java.lang.Object[] array)	Converts an array to a readable string (for debugging purpose).

Methods inherited from class java.lang.Object

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

Constructor Detail

ArraysX

public ArraysX()

Method Detail

toString

public static final java.lang.String toString(java.lang.Object[] array)

Converts an array to a readable string (for debugging purpose).

toString

public static final java.lang.String toString(int[] array)

Converts an array of int to a readable string (for debugging purpose).

toString

public static final java.lang.String toString(long[] array)

Converts an array of long to a readable string (for debugging purpose).

toString

public static final java.lang.String toString(short[] array)

Converts an array of short to a readable string (for debugging purpose).

toString

public static final java.lang.String toString(byte[] array)

Converts an array of byte to a readable string (for debugging purpose).

toString

public static final java.lang.String toString(char[] array)

Converts an array of char to a readable string (for debugging purpose).

toString

public static final java.lang.String toString(boolean[] array)

Converts an array of boolean to a readable string (for debugging purpose).

toString

public static final java.lang.String toString(float[] array)

Converts an array of float to a readable string (for debugging purpose).

toString

public static final java.lang.String toString(double[] array)

Converts an array of char to a readable string (for debugging purpose).

toHexString

public static final java.lang.String toHexString(byte[] array)

Returns the hex String representation of a byte array without prefix 0x. The String is formed by making value[0] the leftmost two digits and value[value.length-1] the rightmost two digits.

Parameters:

array - the byte array

toOctalString

public static final java.lang.String toOctalString(byte[] array,
                                                   java.lang.String prefix)

Returns the octal String representation of a byte array with optional prefix. The String is formed by making value[0] the leftmost three digits and value[value.length-1] the rightmost three digits.

Parameters:

array - the byte array

duplicate

public static final java.lang.Object duplicate(java.lang.Object ary,
                                               int jb,
                                               int je)

Duplicates the specified array.

The array could be an array of objects or primitives.

Parameters:

ary - the array

jb - the beginning index (included)

je - the ending index (excluded)

Returns:

an array duplicated from ary

Throws:

java.lang.IllegalArgumentException - if ary is not any array

java.lang.IndexOutOfBoundsException - if out of bounds

duplicate

public static final <T> T[] duplicate(T[] ary,
                                      int jb,
                                      int je)

Duplicates the specified generic array.

The array could be an array of objects or primitives.

Parameters:

ary - the array

jb - the beginning index (included)

je - the ending index (excluded)

Returns:

an array duplicated from ary

Throws:

java.lang.IllegalArgumentException - if ary is not any array

java.lang.IndexOutOfBoundsException - if out of bounds

Since:

6.0.0

duplicate

public static final java.lang.Object duplicate(java.lang.Object ary)

Duplicates the specified array.

Parameters:

ary - the array

Returns:

an array duplicated from ary

Throws:

java.lang.IllegalArgumentException - if ary is not any array

java.lang.IndexOutOfBoundsException - if out of bounds

duplicate

public static final <T> T[] duplicate(T[] ary)

Duplicates the specified generic array.

Parameters:

ary - the array

Returns:

an array duplicated from ary

Throws:

java.lang.IllegalArgumentException - if ary is not any array

java.lang.IndexOutOfBoundsException - if out of bounds

Since:

6.0.0

concat

public static final java.lang.Object concat(java.lang.Object ary,
                                            java.lang.Object ary1)

Concatenates the two specified array.

The array could be an array of objects or primitives.

Parameters:

ary - the array

ary1 - the array

Returns:

an array concatenating the ary and ary1

Throws:

java.lang.IllegalArgumentException - if ary and ary1 component types are not compatible

concat

public static final <T> T[] concat(T[] ary,
                                   T[] ary1)

Concatenates the two specified generic array.

The array could be an array of objects or primitives.

Parameters:

ary - the array

ary1 - the array

Returns:

an array concatenating the ary and ary1

Throws:

java.lang.IllegalArgumentException - if ary and ary1 component types are not compatible

Since:

6.0.0

shrink

public static final java.lang.Object shrink(java.lang.Object ary,
                                            int jb,
                                            int je)

Shrink the specified array. It is similar to duplicate, except it returns the previous instance if je==length && jb==0.

Parameters:

ary - the array

jb - the beginning index (included)

je - the ending index (excluded)

Returns:

ary or an array duplicated from ary

Throws:

java.lang.IllegalArgumentException - if ary is not any array

java.lang.IndexOutOfBoundsException - if out of bounds

shrink

public static final <T> T[] shrink(T[] ary,
                                   int jb,
                                   int je)

Shrink the specified array. It is similar to duplicate, except it returns the previous instance if je==length && jb==0.

Parameters:

ary - the array

jb - the beginning index (included)

je - the ending index (excluded)

Returns:

ary or an array duplicated from ary

Throws:

java.lang.IllegalArgumentException - if ary is not any array

java.lang.IndexOutOfBoundsException - if out of bounds

Since:

6.0.0

asList

public static final <T> java.util.List<T> asList(T[] ary)

Returns a mutable list.

Never be null.

Parameters:

ary - the data array

Returns:

a list view of the specified array

Since:

6.0.1

asList

public static final <T> java.util.List<java.util.List<T>> asList(T[][] ary)

Returns a two dimensional mutable list.

Never be null.

Parameters:

ary - the two dimensional data array

Returns:

a two dimensional list view of the specified array

Since:

6.0.1

See Also:

asList(Object[])

resize

public static final java.lang.Object resize(java.lang.Object ary,
                                            int size)

Resizes the specified array. Similar to shrink(java.lang.Object, int, int), but it can enlarge and it keeps elements from the first.

resize

public static final <T> T[] resize(T[] ary,
                                   int size)

Resizes the specified generic array.

Since:

6.0.0

asBoxedList

public static java.util.List<java.lang.Object> asBoxedList(java.lang.Object primitiveArray)

Returns a fixed-size boxed list backed by the specified primitive array.

Parameters:

primitiveArray - A primitive array object

Returns:

A List object

Since:

9.6.0