Example usage for java.util List subList

Introduction

In this page you can find the example usage for java.util List subList.

Prototype

List<E> subList(int fromIndex, int toIndex);

Source Link

Document

Returns a view of the portion of this list between the specified fromIndex , inclusive, and toIndex , exclusive.

Usage

From source file:Main.java

public static <T> List<T> truncateList(List<T> lst, int maxTrainDocs) {
    if (maxTrainDocs < lst.size()) {
        return lst.subList(0, maxTrainDocs);
    }/*from  w  ww.  j a  va  2  s .c  o m*/
    return lst;
}

From source file:Main.java

public static <T> List<T> popSubList(List<T> originList, int fromIndex, int toIndex) {
    List<T> subList = originList.subList(fromIndex, toIndex);
    List<T> result = new ArrayList<T>(subList);
    subList.clear();/*from  www  .ja va  2  s. c  o m*/
    return result;
}

From source file:Main.java

public static <T> List<T> subList(List<T> list, int fromIndex, int toIndex) {
    if (list == null)
        return null;
    return list.subList(fromIndex, Math.min(list.size(), toIndex));
}

From source file:com.shirokumacafe.archetype.common.utilities.RandomData.java

/**
 * list?n./*from   ww w.  j a  va  2  s.c  om*/
 */
public static <T> List<T> randomSome(List<T> list, int n) {
    Collections.shuffle(list);
    return list.subList(0, n);
}

From source file:Main.java

public static <K, V> List<K> keyToList(Map<K, V> map, int count) {
    if (isNotNull(map)) {
        if (map.size() <= count) {
            return new ArrayList<K>(map.keySet());
        } else {//from   w  w w . ja  v  a 2s .c  o m
            List<K> list = new ArrayList<K>(map.keySet());
            return list.subList(0, count);
        }
    }
    return null;
}

From source file:Main.java

/**
 * Returns sub list with copied values.// ww w .j  a va  2 s  . co m
 *
 * @param list      source list
 * @param fromIndex start index
 * @param toIndex   end index
 * @param <T>       data type
 * @return sub list with copied values
 */
public static <T> ArrayList<T> copySubList(final List<T> list, final int fromIndex, final int toIndex) {
    return new ArrayList<T>(list.subList(fromIndex, toIndex));
}

From source file:Main.java

public static <T> List<T> range(List<? extends T> list, T min, T max, Comparator<? super T> comparator) {
    List<T> tList = newArrayList();
    addAll(list, tList);//w  w  w.ja  v  a2 s  . c o  m
    tList.sort(comparator);
    return tList.subList(indexOf(list, min), indexOf(list, max) + 1);
    /*
        return list.stream()
            .sorted(comparator)
            .filter(t -> comparator.compare(t,min)>=0&&comparator.compare(t,max)<=0)
            .collect(Collectors.toList());
     */
}

From source file:Main.java

/**
 * Sub the list without exception//w ww  .  j  a  v  a 2  s  .c o m
 */
public static <T> List<T> safeSubList(List<T> list, int start, int end) {
    if (start >= list.size()) {
        return Collections.emptyList();
    }
    return list.subList(start, Math.min(end, list.size()));
}

From source file:Main.java

public static <T> List<T> subList(List<T> target, int size) {
    if (target.size() <= size) {
        return new ArrayList<T>(target);
    } else {//from w  ww .java2s.  c  om
        return target.subList(0, size);
    }
}

From source file:Main.java

public static void move(List<?> collection, int indexToMoveFrom, int indexToMoveAt) {
    if (indexToMoveAt >= indexToMoveFrom) {
        Collections.rotate(collection.subList(indexToMoveFrom, indexToMoveAt + 1), -1);
    } else {/* www  .  j av a 2 s  .c  o m*/
        Collections.rotate(collection.subList(indexToMoveAt, indexToMoveFrom + 1), 1);
    }
}