CollectionUtil

public class CollectionUtil
extends java.lang.Object

Collection utilities.

Constructors
Constructor and Description
`CollectionUtil()`

Methods
Modifier and Type	Method and Description
`static <T> java.util.List<T>`	`add(java.util.List<T> l, T o)` Append `o` to `l`, returning `l`.
`static <T,U> boolean`	`equals(java.util.Collection<T> a, java.util.Collection<U> b)` Return true if `a` and `b` are pointer equal, or if iterators over both return the same sequence of pointer equal elements.
`static <T,U extends T,V extends T> T`	`firstOrElse(java.util.Collection<U> l, V alt)`
`static <T> java.util.List<T>`	`list()` Return an empty list.
`static <T> java.util.List<T>`	`list(T o)` Return a singleton list containing `o`.
`static <T> java.util.List<T>`	`list(T o1, T o2)` Return a list containing `o1` and `o2`.
`static <T> java.util.List<T>`	`list(T o1, T o2, T o3)` Return a list containing `o1`, ..., `o3`.
`static <T> java.util.List<T>`	`list(T o1, T o2, T o3, T o4)` Return a list containing `o1`, ..., `o4`.
`static <T,U> java.util.List<U>`	`map(java.util.List<T> l, Transformation<T,U> t)` Apply `t` to each element of `l`.
`static <T> java.util.List<T>`	`nonNullList(java.util.List<T> l)` Return an empty non-null list if the argument list is null.
`static <T> java.util.Iterator<Pair<T,T>>`	`pairs(java.util.Collection<T> l)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

public static <T> java.util.List<T> add(java.util.List<T> l,
                        T o)

Append o to l, returning l.

public static <T> java.util.List<T> list()

Return an empty list.

public static <T> java.util.List<T> list(T o)

Return a singleton list containing o.

public static <T> java.util.List<T> list(T o1,
                         T o2)

Return a list containing o1 and o2.

public static <T> java.util.List<T> list(T o1,
                         T o2,
                         T o3)

Return a list containing o1, ..., o3.

public static <T> java.util.List<T> list(T o1,
                         T o2,
                         T o3,
                         T o4)

Return a list containing o1, ..., o4.

public static <T,U extends T,V extends T> T firstOrElse(java.util.Collection<U> l,
                                        V alt)

public static <T> java.util.Iterator<Pair<T,T>> pairs(java.util.Collection<T> l)

Class CollectionUtil