org.rapidcontext.util

Class ArrayUtil

java.lang.Object

org.rapidcontext.util.ArrayUtil

public class ArrayUtil
extends java.lang.Object

A set of utility methods for handling native arrays. This is an add-on to the java.util.Arrays class.

Version:

1.0

Author:

Per Cederberg, Dynabyte AB

See Also:

Arrays

Constructor Summary

Constructors

Constructor and Description
ArrayUtil()

Method Summary

Modifier and Type	Method and Description
static int	indexOf(java.lang.Object[] a, java.lang.Object key) Searches for the first matching entry in an array.
static java.lang.Object[]	keys(java.util.Map m) Returns an array of all the keys in a map.
static java.lang.Object[]	keys(java.util.Map m, java.lang.Object[] keys) Returns an array of all the keys in a map.
static java.lang.String[]	stringKeys(java.util.Map m) Returns a string array of the keys in a map.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayUtil

public ArrayUtil()

Method Detail

indexOf

public static int indexOf(java.lang.Object[] a,
                          java.lang.Object key)

Searches for the first matching entry in an array.

Parameters:

a - the array object

key - the search key

Returns:

the first matching index, or -1 if not found

keys

public static java.lang.Object[] keys(java.util.Map m)

Returns an array of all the keys in a map.

Parameters:

m - the map object

Returns:

the array of keys

keys

public static java.lang.Object[] keys(java.util.Map m,
                                      java.lang.Object[] keys)

Returns an array of all the keys in a map.

Parameters:

m - the map object

keys - the array of keys

Returns:

the array of keys

stringKeys

public static java.lang.String[] stringKeys(java.util.Map m)

Returns a string array of the keys in a map.

Parameters:

m - the map object

Returns:

the array of keys

Throws:

java.lang.ClassCastException - if one of the keys wasn't a string