Example usage for java.util.stream Collectors toList

Introduction

In this page you can find the example usage for java.util.stream Collectors toList.

Prototype

public static <T> Collector<T, ?, List<T>> toList()

Source Link

Document

Returns a Collector that accumulates the input elements into a new List .

Usage

From source file:Main.java

@SafeVarargs
public static <T> List<T> unionArraysAsList(T[]... arrays) {
    return Stream.of(arrays).map(Arrays::asList).flatMap(Collection::stream).collect(Collectors.toList());
}

From source file:Main.java

public static <Key, Value> Collection<Value> filterMapValues(Map<Key, Value> map,
        Predicate<Map.Entry<Key, Value>> entryPredicate) {
    return map.entrySet().parallelStream().filter(entryPredicate).map(Map.Entry::getValue)
            .collect(Collectors.toList());
}

From source file:Main.java

public static <T> List<String> toStringsList(T[] array) {
    return Arrays.stream(array).map(x -> x.toString()).collect(Collectors.toList());
}

From source file:Main.java

public static <Key, Value> Collection<Value> filterMapValuesByKey(Map<Key, Value> map,
        Predicate<Key> keyPredicate) {
    return map.entrySet().parallelStream().filter(entry -> keyPredicate.test(entry.getKey()))
            .map(Map.Entry::getValue).collect(Collectors.toList());
}

From source file:Main.java

/**
 * Split the list and return the stream with the resultant lists.
 * @param list to be split/* w  ww  . ja va2s. c  o m*/
 * @param size of each list after splitting.
 * @param <T> type of list.
 * @return {@link List} of {@link ArrayList}s
 */
public static <T> List<List<T>> splitArrayList(final List<T> list, final int size) {
    return splitListStream(list, size).map(ArrayList::new).collect(Collectors.toList());
}

From source file:Main.java

public static <T, R> List<R> map(List<T> collection, Function<T, R> mapper) {
    return stream(collection).map(mapper).collect(Collectors.toList());
}

From source file:Main.java

/**
 * Joins 2 collections into one list.//from   w w  w.j a v  a 2 s.c o  m
 *
 * @param a Some collection
 * @param b Some other collection
 * @param <T> The type of the elements
 *
 * @return A List that contains all the elements of both collections.
 */
public static <T> List<T> join(Collection<? extends T> a, Collection<? extends T> b) {
    return Stream.concat(a.stream(), b.stream()).collect(Collectors.toList());
}

From source file:Main.java

public static <T, R> List<R> apply(List<T> list, Function<T, R> mapper) {
    return list.stream().map(mapper).collect(Collectors.toList());
}

From source file:Main.java

@SuppressWarnings("unchecked")
public static <TargetType, CurrentType> List<TargetType> cast(List<CurrentType> list,
        Class<TargetType> targetClass) {
    return list.stream().map(e -> (TargetType) e).collect(Collectors.toList());
}

From source file:Main.java

public static List<Class> scanAll(String packageName) {
    return scan(packageName).collect(Collectors.toList());
}