com.emthom.gmaeni.utils

クラス Utils

java.lang.Object

com.emthom.gmaeni.utils.Utils

public class Utils
extends java.lang.Object

Various helper functions

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
Utils()

メソッドのサマリー

修飾子とタイプ	メソッドと説明
static boolean	arrayContains(java.lang.Object[] array, java.lang.Object item) Check if an item exists in a array
static boolean	arrayNotEmpty(java.util.ArrayList arrayList) Check if an array if not empty (and not null).
static int	findIndexInArray(java.lang.Object[] array, java.lang.Object item) Return the index of the element if it contains by the array, otherwise return -1
static java.io.File	getFileResource(java.lang.String fileName) Return the file path of a resource
static int	getRandomNumberInRange(int min, int max) Generate a random number between a range (included min and max values)
static void	insertInArray(java.util.ArrayList arrayList, int index, java.lang.Object value) Insert an Object into an ArrayList at an specific index (without erase the existing one)
static java.util.Collection<java.io.File>	listFileTree(java.io.File dir, java.lang.String fileType) Recursive algorithm to list all files in directory
static java.lang.String	randomHashKey() Generate random hash key (32 characters)
static java.util.ArrayList<java.lang.Object>	toArrayList(java.lang.Object[] array) Convert a simple array to an ArrayList

クラスから継承されたメソッド java.lang.Object

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

コンストラクタの詳細

Utils

public Utils()

メソッドの詳細

listFileTree

public static java.util.Collection<java.io.File> listFileTree(java.io.File dir,
                                                              java.lang.String fileType)

Recursive algorithm to list all files in directory

パラメータ:

dir - Root directory to scan

fileType - Filter of file type to search (extension)

戻り値:

All files found

getFileResource

public static java.io.File getFileResource(java.lang.String fileName)

Return the file path of a resource

パラメータ:

fileName - Name of the resource

戻り値:

File path of the resource if exists, otherwise return null

getRandomNumberInRange

public static int getRandomNumberInRange(int min,
                                         int max)

Generate a random number between a range (included min and max values)

パラメータ:

min - Min value

max - Max value

戻り値:

Random value

insertInArray

public static void insertInArray(java.util.ArrayList arrayList,
                                 int index,
                                 java.lang.Object value)

Insert an Object into an ArrayList at an specific index (without erase the existing one)

パラメータ:

arrayList - ArrayList to edit

index - Index where insert the new object

value - Object to insert

toArrayList

public static java.util.ArrayList<java.lang.Object> toArrayList(java.lang.Object[] array)

Convert a simple array to an ArrayList

パラメータ:

array - Simple Array

戻り値:

ArrayList

randomHashKey

public static java.lang.String randomHashKey()

Generate random hash key (32 characters)

戻り値:

Hash key

arrayContains

public static boolean arrayContains(java.lang.Object[] array,
                                    java.lang.Object item)

Check if an item exists in a array

パラメータ:

array - Array to analyse

item - Item to search

戻り値:

True if item exists in the array

findIndexInArray

public static int findIndexInArray(java.lang.Object[] array,
                                   java.lang.Object item)

Return the index of the element if it contains by the array, otherwise return -1

パラメータ:

array - Array to analyse

item - Item to search

戻り値:

Index of the element if it contains by the array, otherwise return -1

arrayNotEmpty

public static boolean arrayNotEmpty(java.util.ArrayList arrayList)

Check if an array if not empty (and not null).

パラメータ:

arrayList - Array to test

戻り値:

True if not null and not empty