CollectionUtil (Payara Project 4.1.2.174 API)

public final class CollectionUtil
extends Object

Various helper utilities for Collections.

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static <T> void`	`addAll(Collection<T> c, T[] items)`
`static <T> void`	`addArray(Collection<T> c, T[] array)` Add all items in an array to a set.
`static <T> T`	`getSingleton(Collection<T> s)`
`static boolean`	`isAllStrings(Collection<?> c)`
`static <T> T[]`	`toArray(Collection<? extends T> c, Class<T> elementClass)`
`static <T> String`	`toString(Collection<T> c, String delim)`
`static <T> String[]`	`toStringArray(Collection<T> c)`
`static <T> List<String>`	`toStringList(Collection<T> c)`

public static <T> void addAll(Collection<T> c,
                              T[] items)

public static <T> String toString(Collection<T> c,
                                  String delim)

public static <T> String[] toStringArray(Collection<T> c)

public static <T> List<String> toStringList(Collection<T> c)

public static <T> T getSingleton(Collection<T> s)

public static <T> void addArray(Collection<T> c,
                                T[] array)

Add all items in an array to a set.

public static <T> T[] toArray(Collection<? extends T> c,
                              Class<T> elementClass)

Parameters:: c - the Collection; elementClass - the type of the element, must be non-primitive
Returns:: array of [] elements

Class CollectionUtil