Example usage for java.util List get

Introduction

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

Prototype

E get(int index);

Source Link

Document

Returns the element at the specified position in this list.

Usage

From source file:Main.java

/**
 * Selects pseudo-random elements from a collection
 *
 * @param c      Collection to select from
 * @param n      Number of elements to select
 * @param unique Whether the selection should be unique
 * @return Random element(s) from collection
 */// www.j av a  2 s .c o  m
public static <E> Collection<E> randomElement(Collection<E> c, int n, boolean unique) {
    List<E> out = new ArrayList<>();
    List<E> l = new ArrayList<>(c);

    while (out.size() < n) {
        E e = l.get(ThreadLocalRandom.current().nextInt(0, l.size()));
        out.add(e);
        if (unique)
            l.remove(e);
    }
    return out;
}

From source file:Main.java

public static Map<String, String> convertFromString(String text) {
    Map<String, String> result = new LinkedHashMap<String, String>();
    List<String> keyValuePairs = decode(text, ';');
    for (String pair : keyValuePairs) {
        List<String> keyAndValue = decode(pair, '=');
        String key = keyAndValue.get(0);
        String value = keyAndValue.get(1);
        result.put(key, value);/*from   w w w  .j  av a2s .  c  o  m*/
    }
    return result;
}

From source file:Main.java

public static long[] LongListTolongArray(List<Long> lg) {
    long[] l = new long[lg.size()];
    for (int i = 0; i < lg.size(); i++) {
        l[i] = lg.get(i).longValue();
    }/*from ww  w .ja va 2s  . c  om*/
    return l;
}

From source file:Main.java

/**
 * This method will return a random element of the given list.
 * /*from w ww . j a v a 2 s . c o  m*/
 * @param list
 *          - list from which a random element will be picked up.
 * @return an element picked up from the supplied list.
 */
public static <T> T getRandomItem(List<T> list) {
    if (list == null || list.size() <= 0) {
        return null;
    }
    return list.get(rand.nextInt(list.size()));
}

From source file:Main.java

/**
 * Method to get a single Bitmap combining multiple pieces side by side.
 * Pieces are combined from left to right iterating over {@code bitmapListCopy}.
 *
 * @param bitmapListCopy The List of Bitmaps' pieces.
 * @param numStages      the maximum number of stages
 * @return The file Bitmap with all pieces combined.
 *//*  www.  jav a  2s.co  m*/
@Deprecated
public static Bitmap getCombinedBitmapByPieces(List<Bitmap> bitmapListCopy, int numStages) {
    Bitmap finalBitmap = bitmapListCopy.get(0);

    for (int i = 0; i < numStages; i++) {
        if (i > 0) { //skip first cycle
            finalBitmap = combineImagesSideBySide(finalBitmap, bitmapListCopy.get(i));
        }
    }
    return finalBitmap;
}

From source file:Main.java

public static <T> T getLastElement(List<T> liste) {
    if (isEmpty(liste)) {
        return null;
    } else {//w w w.  j  a  v  a2 s  . c  om
        return liste.get(liste.size() - 1);
    }
}

From source file:Main.java

public static <T> T lastOrDefault(List<T> source) {
    if (source == null || source.size() == 0)
        return null;

    return source.get(source.size() - 1);

}

From source file:Main.java

public static String componentsJoinedByString(List<String> list, String separator) {
    StringBuilder sb = new StringBuilder();
    sb.append(list.get(0));
    int length = list.size();
    for (int i = 1; i < length; i++) {
        sb.append(separator).append(list.get(i));
    }/*from ww  w .  ja va2 s.c  om*/
    return sb.toString();
}

From source file:Main.java

public static <A, B> List<Pair<A, B>> zip(final List<A> as, final List<B> bs) {
    return IntStream.range(0, Math.min(as.size(), bs.size())).mapToObj(i -> new Pair<>(as.get(i), bs.get(i)))
            .collect(Collectors.toList());
}

From source file:Main.java

public static String[] listToArray(List<String> l) {
    String[] a = new String[l.size()];
    for (int i = 0; i < l.size(); i++) {
        a[i] = l.get(i);
    }/*w  w w. jav  a 2 s.  c  o  m*/
    return a;
}