org.fest.util
Class Arrays

java.lang.Object
  extended by org.fest.util.Arrays

public class Arrays
extends Object

Understands utility methods related to arrays.

Author:
Alex Ruiz, Joel Costigliola

Method Summary
static
<T> T[]
array(T... values)
          Returns an array containing the given arguments.
static String format(Object array)
          Returns the String representation of the given array, or null if the given object is either null or not an array.
static
<T> boolean
hasOnlyNullElements(T[] array)
          Returns true if the given array has only null elements, false otherwise.
static
<T> boolean
isEmpty(T[] array)
          Returns true if the given array is null or empty.
static
<T> T[]
nonNullElements(T[] array)
          Returns a new array composed of the non-null elements of the given array.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

isEmpty

public static <T> boolean isEmpty(T[] array)
Returns true if the given array is null or empty.

Type Parameters:
T - the type of elements of the array.
Parameters:
array - the array to check.
Returns:
true if the given array is null or empty, otherwise false.

array

public static <T> T[] array(T... values)
Returns an array containing the given arguments.

Type Parameters:
T - the type of the array to return.
Parameters:
values - the values to store in the array.
Returns:
an array containing the given arguments.

format

public static String format(Object array)
Returns the String representation of the given array, or null if the given object is either null or not an array. This method supports arrays having other arrays as elements.

Parameters:
array - the object that is expected to be an array.
Returns:
the String representation of the given array.

nonNullElements

public static <T> T[] nonNullElements(T[] array)
Returns a new array composed of the non-null elements of the given array. This method returns an empty array if the given array has only null elements or if it is empty. This method returns null if the given array is null.

Type Parameters:
T - the type of elements of the array.
Parameters:
array - the array we want to extract the non-null elements.
Returns:
a new array composed of the non-null elements of the given array, or null if the given array is null.
Since:
1.1.3

hasOnlyNullElements

public static <T> boolean hasOnlyNullElements(T[] array)
Returns true if the given array has only null elements, false otherwise. If given array is empty, this method returns true.

Type Parameters:
T - the type of elements of the array.
Parameters:
array - the given array. It must not be null.
Returns:
true if the given array has only null elements or is empty, false otherwise.
Throws:
NullPointerException - if the given array is null.
Since:
1.1.3


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