Example usage for java.util Collections addAll

Introduction

In this page you can find the example usage for java.util Collections addAll.

Prototype

@SafeVarargs
public static <T> boolean addAll(Collection<? super T> c, T... elements)

Source Link

Document

Adds all of the specified elements to the specified collection.

Usage

From source file:Main.java

/**
 * Returns data converted into list./*w  ww. ja  v  a  2  s.  c  o m*/
 *
 * @param data data
 * @param <T>  data type
 * @return data list
 */
public static <T> ArrayList<T> copy(final T... data) {
    final ArrayList<T> list = new ArrayList<T>(data.length);
    Collections.addAll(list, data);
    return list;
}

From source file:edu.umich.robot.util.Configs.java

public static void toLog(Log logger, Config config) {
    if (!logger.isDebugEnabled())
        return;// w  w  w .j  av a 2s.com

    List<String> keys = new LinkedList<String>();
    Collections.addAll(keys, config.getKeys());
    Collections.sort(keys);
    for (String key : keys)
        logger.debug(String.format("%s = %s", key, Arrays.toString(config.getStrings(key))));
}

From source file:Main.java

public static <E> List<E> asList(E... elements) {
    if (elements == null || elements.length == 0) {
        return Collections.emptyList();
    }/* ww  w  .ja  v a  2 s  .  c o m*/
    // Avoid integer overflow when a large array is passed in
    int capacity = (int) Math.min(5L + elements.length + (elements.length / 10), Integer.MAX_VALUE);
    ArrayList<E> list = new ArrayList<E>(capacity);
    Collections.addAll(list, elements);
    return list;
}

From source file:Main.java

public static <T> T[] intersection(@NonNull final T[] array1, @NonNull final T[] array2) {
    final List<T> list1 = new ArrayList<>();
    Collections.addAll(list1, array1);
    final List<T> list2 = new ArrayList<>();
    Collections.addAll(list2, array2);
    list1.retainAll(list2);//from   w  ww.  j  av  a  2s .  com
    //noinspection unchecked
    return list1.toArray((T[]) Array.newInstance(array1.getClass().getComponentType(), list1.size()));
}

From source file:Main.java

public static void innerListFiles(Collection<File> files, File directory, FileFilter filter) {
    File[] found = directory.listFiles();
    if (found != null) {
        for (File aFound : found) {
            if (aFound.isDirectory()) {
                innerListFiles(files, aFound, filter);
            } else {
                File[] found2 = directory.listFiles(filter);
                Collections.addAll(files, found2);
            }//w w  w.  j  a  v a 2s . c o  m
        }
    }
}

From source file:Main.java

/**
 * Create a hashed set from an array.//  ww  w. j a v a2s.c om
 * 
 * @param <T>
 *            type
 * @param elements
 *            elements in the set.
 * @return the set.
 * @see Arrays#asList(Object[])
 */
public static <T> HashSet<T> asHashSet(@SuppressWarnings("unchecked") T... elements) {
    HashSet<T> result = new HashSet<T>();

    Collections.addAll(result, elements);

    return result;
}

From source file:Main.java

/**
 * Helper function that takes an object and returns a list representation
 * of it://from   w w w.  j av  a 2 s.c om
 *
 * o == null => []
 * o is a list => o
 * else => [o]
 *
 * @param o
 * @return
 */
public static List<Object> toList(final Object o) {
    if (o == null)
        return Collections.emptyList();
    else if (o instanceof List)
        return (List<Object>) o;
    else if (o.getClass().isArray()) {
        final List<Object> l = new ArrayList<Object>();
        Collections.addAll(l, (int[]) o);
        return l;
    } else
        return Collections.singletonList(o);
}

From source file:jease.site.Authorizations.java

/**
 * Returns guarding Access object for given content or null, if content is
 * not guarded./*from  w ww  .  j  av a 2s .  com*/
 */
public static Access[] getGuards(Content content) {
    if (content == null) {
        return null;
    }
    Map<Content, Access[]> cache = Database.query(accessByContent);
    if (!cache.containsKey(content)) {
        List<Access> allGuards = new ArrayList<>();
        Access[] accessGuards = content.getGuards(Access.class);
        if (ArrayUtils.isNotEmpty(accessGuards)) {
            Collections.addAll(allGuards, accessGuards);
        } else {
            Reference[] referenceGuards = content.getGuards(Reference.class);
            if (ArrayUtils.isNotEmpty(referenceGuards)) {
                for (Reference reference : referenceGuards) {
                    if (reference.getContent() instanceof Access) {
                        allGuards.add((Access) reference.getContent());
                    }
                }
            }
        }
        cache.put(content, allGuards.toArray(new Access[allGuards.size()]));
    }
    List<Access> activeGuards = new ArrayList<>();
    for (Access access : cache.get(content)) {
        if (access.isGuarding()) {
            activeGuards.add(access);
        }
    }
    if (!activeGuards.isEmpty()) {
        return activeGuards.toArray(new Access[activeGuards.size()]);
    } else {
        return getGuards((Content) content.getParent());
    }
}

From source file:Main.java

static String composeFilesString(final String dirPath, final List<String> subDirPaths, final String pattern,
        int skip) {
    final StringBuilder sb = new StringBuilder();
    final List<File> allFiles = new ArrayList<>();
    final FilenameFilter filter = new FilenameFilter() {
        @Override/* w  ww  .ja va 2s. c  o m*/
        public boolean accept(File dir, String name) {
            return name.matches(pattern);
        }
    };
    for (final String subDirPath : subDirPaths) {
        final File subDir = new File(dirPath, subDirPath);
        final File[] files = subDir.listFiles(filter);
        if (files == null) {
            throw new RuntimeException(String.format("%s directory does not exist", subDir.getPath()));
        }
        Arrays.sort(files);
        Collections.addAll(allFiles, files);
    }
    final int m;
    final int n;
    if (skip >= 0) {
        m = skip;
        n = allFiles.size();
    } else {
        m = 0;
        n = allFiles.size() + skip;
    }
    for (int i = m; i < n; i++) {
        final File file = allFiles.get(i);
        if (sb.length() > 0) {
            sb.append(' ');
        }
        sb.append(file.getPath());
    }
    return sb.toString();
}

From source file:Main.java

/**
 * Creates a {@link List} from incoming {@literal "varargs"}. Currently 
 * uses {@link ArrayList} as the {@code List} implementation.
 * //from ww  w .  j a va 2  s. c o  m
 * <p>Used like so:
 * {@code List<String> listy = list("y", "helo", "thar");}
 * 
 * @param elements Items that will make up the elements of the returned
 * {@code List}.
 * 
 * @return A {@code List} whose elements are each item within {@code elements}.
 */
public static <E> List<E> list(E... elements) {
    List<E> newList = arrList(elements.length);
    Collections.addAll(newList, elements);
    return newList;
}