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 Set<String> getAllFaceIds(String personId, Context context) {
    SharedPreferences faceIdSet = context.getSharedPreferences(personId + "FaceIdSet", Context.MODE_PRIVATE);
    return faceIdSet.getStringSet("FaceIdSet", new HashSet<String>());
}

From source file:Main.java

public static <T> Set<Class<T>> findClassesAssignableFrom(String packageName, Class<T> assignableFrom)
        throws IOException, ClassNotFoundException {
    ClassLoader loader = Thread.currentThread().getContextClassLoader();
    Set<Class<T>> classes = new HashSet<Class<T>>();
    String path = packageName.replace('.', '/');
    URL resource = loader.getResource(path);
    if (resource != null) {
        String filePath = resource.getFile();
        if (filePath != null && new File(filePath).isDirectory()) {
            for (String file : new File(filePath).list()) {
                if (file.endsWith(".class")) {
                    String name = packageName + '.' + file.substring(0, file.indexOf(".class"));
                    Class<T> clazz = (Class<T>) Class.forName(name);
                    if (assignableFrom.isAssignableFrom(clazz))
                        classes.add(clazz);
                }/* w w w.j a  v  a 2 s .c  om*/
            }
        }
    }
    return classes;
}

From source file:Main.java

public static Set<String> getLoggedInUsers(Context context) {
    return PreferenceManager.getDefaultSharedPreferences(context).getStringSet(LOGGED_IN_USER_PREFERENCE_KEY,
            new HashSet<>());
}

From source file:Main.java

/**
 * Select the given number of elements from the given set.
 *
 * @param <T>   encapsulated type/*w  w  w.  jav a  2  s.com*/
 * @param set   set
 * @param count number of elements to retrieve
 * @return set
 */
public static <T> Set<T> selectSome(Set<T> set, int count) {
    Set<T> newSet = new HashSet<T>();
    int i = 0;
    for (T each : set) {
        if (++i > count) {
            break;
        }
        newSet.add(each);
    }
    return newSet;
}

From source file:Main.java

/**
 * Turns a list of vararg parameters into a set.
 *
 * @param  ts  The vararg parameters./*  ww w. j  av a 2s.  c  o m*/
 * @param  <T> The type of the parameters.
 *
 * @return A set created by adding the parameters in the order presented into a set.
 */
public static <T> Set<T> paramsToSet(T... ts) {
    Set<T> result = new HashSet<>();

    Collections.addAll(result, ts);

    return result;
}

From source file:Main.java

public static <T> HashSet<T> newHashSet(Collection<T> collection) {
    HashSet<T> set = new HashSet<T>();
    set.addAll(collection);//  w w w.j a  v a  2 s. co m
    return set;
}

From source file:Main.java

private static Collection getEmpty(Collection collection) {
    try {// w  w  w. j ava 2  s .c  om
        return (Collection) collection.getClass().newInstance();
    } catch (Exception e) {
        if (collection instanceof List) {
            return new ArrayList();
        } else {
            return new HashSet();
        }
    }
}

From source file:Main.java

public static ArrayList<Double> stringToDoubleListRemoved(String s, String delimeter, int[] fieldsToBeRemoved) {
    ArrayList<Double> ret = new ArrayList<Double>();

    ArrayList<Double> allFields = stringToDoubleList(s, delimeter);

    HashSet<Integer> toBeRemoved = new HashSet<Integer>();
    for (int i : fieldsToBeRemoved)
        toBeRemoved.add(i);/*w  ww.  j  ava 2  s .  c o  m*/

    for (int i = 0; i < allFields.size(); i++) {
        if (toBeRemoved.contains(i))
            continue;
        ret.add(allFields.get(i));
    }
    return ret;
}

From source file:Main.java

public static Set<String> getExpectedDoorNames() {
    Set<String> expectedDoors = new HashSet<>();
    expectedDoors.add(DOOR1_NAME);//w  w w . ja  v a 2 s.c  o m
    expectedDoors.add(DOOR2_NAME);
    expectedDoors.add(DOOR3_NAME);
    return expectedDoors;
}

From source file:Main.java

public static Set<String> getAllPersonIds(String personGroupId, Context context) {
    SharedPreferences personIdSet = context.getSharedPreferences(personGroupId + "PersonIdSet",
            Context.MODE_PRIVATE);
    return personIdSet.getStringSet("PersonIdSet", new HashSet<String>());
}