uk.ac.ed.inf.utils
Class ArrayUtils

java.lang.Object
  uk.ac.ed.inf.utils.ArrayUtils

public class ArrayUtils
extends java.lang.Object

Utilities to manipulate arrays. Reminder: indexing of array of arrays cells > [row index][column index]

Version:

4 Jan 2008

Author:

Luna De Ferrari luna.deferrari-at-ed.ac.uk

Constructor Summary

ArrayUtils()

Method Summary

static boolean	arrayIsEmpty(java.lang.String[] array) Checks whether an array is empty
static java.util.Vector<java.lang.String>	fromArrayofArraysToColumnVector(java.lang.String[][] array, int columnIndex) Converts a column of an array of arrays into a vector
static java.util.ArrayList	fromArrayToArrayList(java.lang.Object[] array) Creates an arrayList from an array
static java.util.Vector	fromArrayToVector(java.lang.Object[] array) Creates a vector from an array
static java.util.ArrayList<java.lang.String>	fromStringArrayToArrayList(java.lang.String[] array) Creates an arrayList from an array
static int[]	getCommonElements(int[] list1, int[] list2) Gets the elements present in both lists
static java.util.LinkedHashSet	getCommonElements(java.lang.Object[] list1, java.lang.Object[] list2) Gets the elements present in both lists
static java.lang.String	getString(java.lang.String[] array) Returns a string representation for an array
static void	printArray(java.lang.String[] array) Prints an array (String[])
static void	printArrayOfArrays(java.lang.String[][] matrix) Prints an array of arrays (String[][])
static void	printArrayOfObjects(java.lang.Object[] array) Prints an array of objects
static java.lang.String[][]	stringToArrayOfArrays(java.lang.String string, java.lang.String regExp) Reads a special-character-separated string (eg comma or tab separated) and creates an array of rows-columns.

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayUtils

public ArrayUtils()

Method Detail

arrayIsEmpty

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

Checks whether an array is empty

Parameters:

array - an array of strings (String[])

Returns:

true if the array is empty, false otherwise

fromArrayofArraysToColumnVector

public static java.util.Vector<java.lang.String> fromArrayofArraysToColumnVector(java.lang.String[][] array,
                                                                                 int columnIndex)

Converts a column of an array of arrays into a vector

Parameters:

array - an array of arrays

columnIndex - the column index (the first column index is 0)

Returns:

a vector containing the first column

fromArrayToArrayList

public static java.util.ArrayList fromArrayToArrayList(java.lang.Object[] array)

Creates an arrayList from an array

Parameters:

array - a Object[]

Returns:

an ArrayList