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

public static byte[] list2buffer(List<Byte> list) {
    byte[] buffer = new byte[list.size()];
    for (int i = 0; i < list.size(); i++) {
        buffer[i] = list.get(i);
    }//from w ww  .  j  a  v a 2  s . co  m
    return buffer;
}

From source file:Main.java

public static int[] toPrimitiveInt(List<Integer> list) {
    int[] array = new int[list.size()];
    for (int i = 0; i < list.size(); i++) {
        array[i] = list.get(i);
    }/*from  w  w w . ja v a  2  s  . c  o m*/
    return array;
}

From source file:com.us.test.H2Helper.java

/**
 * IP//from  w w w .  j a v a  2s  .  c  o  m
 */
private static String ip2Long(String str) {
    List<Long> ary = StringUtil.splitKillNull(str, "\\.");
    long l = 0;
    l += ary.get(0) * 256l * 256l * 256l;
    l += ary.get(1) * 256l * 256l;
    l += ary.get(2) * 256l;
    l += ary.get(3);
    return Long.toString(l);
}

From source file:Main.java

/**
 * Returns the last element of the collection.
 * /*from   ww  w. j ava2  s.  co  m*/
 * @param <T>
 *            the element type
 * @param iterable
 *            the collection
 * @return the last element or null if the list is empty
 */
public static <T> T last(Iterable<T> iterable) {
    if (iterable instanceof Deque<?>)
        return ((Deque<T>) iterable).getLast();
    if (iterable instanceof List<?>) {
        List<T> list = (List<T>) iterable;
        return list.isEmpty() ? null : list.get(list.size() - 1);
    }
    Iterator<T> iterator = iterable.iterator();
    T last = null;
    while (iterator.hasNext())
        last = iterator.next();
    return last;
}

From source file:Main.java

public static final Element getChildElement(Element parent) throws IOException {
    final List<Element> childElements = getChildElements(parent);
    if (childElements.size() == 1) {
        return childElements.get(0);
    } else {/* w w  w. j a  v  a  2  s  .c  o  m*/
        throw new IOException("Expected one child element");
    }
}

From source file:Main.java

public static ResolveInfo getResolveInfo(PackageManager pm, String packageName) {
    Intent intent = new Intent(Intent.ACTION_MAIN, null);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    intent.setPackage(packageName);/*from  w  ww  . ja v  a  2 s .  co m*/
    List<ResolveInfo> apps = pm.queryIntentActivities(intent, 0);
    if (apps != null && apps.size() > 0) {
        return apps.get(0);
    }
    return null;
}

From source file:Main.java

/**
 * Helper method to format a list of names.
 * @param names The list of names//from w  w w  . j a v a 2  s . co  m
 */
public static String formatNames(List<String> names) {
    if (names == null || names.size() == 0)
        return "";

    String namesListString = names.get(0);

    for (int i = 1; i < names.size(); i++) {
        namesListString += ", " + names.get(i);
    }
    return namesListString;
}

From source file:Main.java

public static <T extends Object> T[] toArray(List<T> list) {
    if (list == null || list.isEmpty())
        return null;

    T[] array = (T[]) Array.newInstance(list.get(0).getClass(), list.size());
    for (int i = 0; i < array.length; i++)
        array[i] = list.get(i);// www  . j  a va  2 s . c o m
    return array;
}

From source file:Main.java

public static <A> List<A> iterateCorecursive(A seed, Function<A, A> fun, Integer n) {
    List<A> acc = new ArrayList<>(n);
    acc.add(seed);/*  w w  w. ja va  2s  . c om*/
    for (int count = 0; count < n - 1; ++count) {
        A last = acc.get(count);
        acc.add(fun.apply(last));
    }
    return acc;
}

From source file:Main.java

static <T extends Comparable<T>> void nthElement(int start, int n, int end, List<T> list) {
    List<T> newList = new ArrayList<T>();
    for (int i = start; i < end; i++)
        newList.add(list.get(i));
    Collections.sort(newList);/*from  ww w .  ja v  a  2s  . c  om*/
    for (int i = start, j = 0; i < end; i++, j++)
        list.set(i, newList.get(j));
}