Example usage for java.util HashSet HashSet

Introduction

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

Prototype

public HashSet()

Source Link

Document

Constructs a new, empty set; the backing HashMap instance has default initial capacity (16) and load factor (0.75).

Usage

From source file:Main.java

public static void logOutUser(Context context, String userId) {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    Set<String> currentUsers = prefs.getStringSet(LOGGED_IN_USER_PREFERENCE_KEY, new HashSet<>());
    currentUsers.remove(userId);/*from w ww  .  j  av a 2 s. co  m*/
    PreferenceManager.getDefaultSharedPreferences(context).edit()
            .putStringSet(LOGGED_IN_USER_PREFERENCE_KEY, currentUsers).commit();
}

From source file:Main.java

/**
 * Returns album IDs containing at least one cached track.
 * @return Albums IDs/*from w  w  w  . j a v  a  2  s. co  m*/
 */
public static Set<String> getCachedAlbumSet() {
    File cacheDir = getMusicCacheDir();
    File[] albumList = cacheDir.listFiles();
    Set<String> output = new HashSet<>();
    for (File album : albumList) {
        if (album.list(new FilenameFilter() {
            @Override
            public boolean accept(File dir, String filename) {
                return filename.endsWith(".complete");
            }
        }).length > 0) {
            output.add(album.getName());
        }
    }
    return output;
}

From source file:Main.java

public static Set getAllRunningService(Context context) {
    ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    List<RunningServiceInfo> infos = activityManager.getRunningServices(0x7FFFFFFF);
    Set<String> names = new HashSet<>();
    if (infos == null || infos.size() == 0)
        return null;
    for (RunningServiceInfo info : infos) {
        names.add(info.service.getClassName());
    }/*from   w  w  w.j av  a 2 s. c  om*/
    return names;
}

From source file:Main.java

public static Set<Long> crossing(Set<Long> list1, Set<Long> list2) {
    Set<Long> resultList = new HashSet();
    for (Long l : list1) {
        if (list2.contains(l)) {
            resultList.add(l);// w ww.j  av a 2s  . co m
        }
    }
    return resultList;
}

From source file:Main.java

/**
 * Returns all objects in list1 that are not in list2
 *
 * @param <T> Type of items in the collection
 * @param list1 First collection/*www .  j  a v a2  s  .  co m*/
 * @param list2 Second collection
 * @return The collection difference list1 - list2
 */
public static <T> Set<T> diffAsSet(Collection<T> list1, Collection<T> list2) {
    Set<T> diff = new HashSet<T>();
    for (T t : list1) {
        if (!list2.contains(t)) {
            diff.add(t);
        }
    }
    return diff;
}

From source file:Main.java

/**
 * Returns the slot pattern. //  w w w.  j a  v  a2  s . c om
 *
 * Start slot   Block size   Increment
 * 0         5         25
 * 10         5         25
 * 18         4         25
 * @return
 */
private static Set<String> getFATDMASlotPattern() {
    if (FATDMASlotPattern == null) {
        FATDMASlotPattern = new HashSet<String>();

        for (int startSlot = 0; startSlot <= 2500; startSlot += 25) {
            for (int i = 0; i <= 4; ++i) {
                int slot = startSlot + i;

                FATDMASlotPattern.add(slot + "");
            }
        }

        for (int startSlot = 10; startSlot <= 2500; startSlot += 25) {
            for (int i = 0; i <= 4; ++i) {
                int slot = startSlot + i;

                FATDMASlotPattern.add(slot + "");
            }
        }

        for (int startSlot = 18; startSlot <= 2500; startSlot += 25) {
            for (int i = 0; i <= 3; ++i) {
                int slot = startSlot + i;

                FATDMASlotPattern.add(slot + "");
            }
        }

        return FATDMASlotPattern;
    } else {
        return FATDMASlotPattern;
    }
}

From source file:Main.java

public static Set<String> split(String string, String separator) {
    Set<String> set = new HashSet<String>();
    if (string == null)
        return set;
    String[] split = string.split(separator);
    for (String v : split)
        set.add(v.trim());/*from   ww w  . j a  v a 2s.c o m*/

    return set;

}

From source file:Main.java

public static void addToFavorites(final Context context, long movieId) {
    SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
    Set<String> set = sp.getStringSet(PREF_FAVORED_MOVIES, null);
    if (set == null)
        set = new HashSet<>();
    set.add(String.valueOf(movieId));
    sp.edit().putStringSet(PREF_FAVORED_MOVIES, set).apply();
}

From source file:Main.java

/**
 * Get all threads/*w w w  .ja va 2s.  c om*/
 * 
 * @return
 */
public static String[] getThreadNames() {
    ThreadGroup group = Thread.currentThread().getThreadGroup();
    ThreadGroup parent = null;
    while ((parent = group.getParent()) != null) {
        group = parent;
    }
    Thread[] threads = new Thread[group.activeCount()];
    group.enumerate(threads);
    HashSet<String> set = new HashSet<String>();

    for (int i = 0; i < threads.length; ++i) {
        if (threads[i] != null && threads[i].isAlive()) {
            try {
                set.add(threads[i].getThreadGroup().getName() + ", " + threads[i].getName() + ", "
                        + threads[i].getPriority() + ", " + threads[i].getState());
            } catch (Throwable e) {
                e.printStackTrace();
            }
        }
    }
    String[] result = (String[]) set.toArray(new String[0]);
    Arrays.sort(result);

    for (int i = 0; i < result.length; i++) {
        //         logger.debug(result[i]);
    }

    return result;
}

From source file:Main.java

private static <T> Collection<T> newCollection(Collection<T> coll) {
    try {//from w  w  w  . j  a  va  2  s .  co m
        Class cl = coll.getClass();
        Constructor con = cl.getConstructor(new Class[0]);
        return (Collection<T>) con.newInstance(new Object[0]);
    } catch (Exception e) {
        if (coll instanceof List)
            return new LinkedList<T>();
        if (coll instanceof Set)
            return new HashSet<T>();
        throw new RuntimeException("Cannot handle this collection");
    }
}