Example usage for java.util Collection toArray

Introduction

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

Prototype

default <T> T[] toArray(IntFunction<T[]> generator)

Source Link

Document

Returns an array containing all of the elements in this collection, using the provided generator function to allocate the returned array.

Usage

From source file:Main.java

/**
 * Copies a collection into an array.// w  w  w .ja  va 2 s  .c  om
 * 
 * @param collection
 *        is the collection that should be copied to an array
 * @param type
 *        is the class of the elements in the collection
 * @return the array copy
 */
public static <T> T[] toArray(final Collection<T> collection, final Class<T> type) {

    final int size = collection.size();
    @SuppressWarnings("unchecked")
    final T[] array = (T[]) Array.newInstance(type, size);
    collection.toArray(array);

    return array;
}

From source file:com.google.code.guice.repository.configuration.RepositoriesGroupBuilder.java

public static RepositoriesGroupBuilder forPackages(Collection<String> repositoriesPackages) {
    Assert.notEmpty(repositoriesPackages);
    Assert.noNullElements(repositoriesPackages.toArray(new String[repositoriesPackages.size()]));
    return new RepositoriesGroupBuilder(repositoriesPackages);
}

From source file:com.aionemu.commons.utils.PropertiesUtils.java

/**
 * Loads all .property files form directory
 *
 * @param dir       directory//from w w  w  . j a v  a2 s.c o  m
 * @param recursive parse subdirectories or not
 * @return array of loaded properties
 * @throws IOException if was unable to read properties
 */
@SuppressWarnings("unchecked")
public static Properties[] loadAllFromDirectory(File dir, boolean recursive) throws IOException {
    Collection<File> files = FileUtils.listFiles(dir, new String[] { "properties" }, recursive);
    return load(files.toArray(new File[files.size()]));
}

From source file:StringUtils.java

public static String[] toStringArray(Collection collection) {
    if (collection == null) {
        return null;
    }/*from   w  w w . ja v a2  s .com*/
    return (String[]) collection.toArray(new String[collection.size()]);
}

From source file:com.judoscript.jamaica.MyUtils.java

public static String[] toStringArray(Collection<String> col) {
    return col.toArray(new String[col.size()]);
}

From source file:Main.java

public static <T> String[] compact(Collection<T> col) {

    Collection<String> result = new ArrayList();

    for (T e : col) {
        String str = e.toString();
        if (!str.trim().isEmpty())
            result.add(str);// w ww  .  j a va  2 s. co m
    }

    return result.toArray(new String[result.size()]);

}

From source file:net.dv8tion.jda.core.Permission.java

public static long getRaw(Collection<Permission> permissions) {
    Args.notNull(permissions, "Permission Collection");

    return getRaw(permissions.toArray(new Permission[permissions.size()]));
}

From source file:com.kwoksys.framework.util.StringUtils.java

/**
 * Joins a list of strings.// w w w .  ja  v  a  2  s.com
 * @param strings
 * @param token
 * @return
 */
public static String join(Collection<String> strings, String token) {
    return join(strings.toArray(new String[strings.size()]), token);
}

From source file:Main.java

@SuppressWarnings("unchecked")
public static <T> T[] merge(T[] c1, Collection<T> c2) {
    return merge(c1, c2 == null ? null : (T[]) c2.toArray(new Object[0]));
}

From source file:com.facebook.hiveio.mapreduce.output.WritingTool.java

/**
 * add string to collection//from w w w .j  ava2 s  . c o  m
 *
 * @param conf   Configuration
 * @param name   to add
 * @param values values for collection
 */
private static void addToStringCollection(Configuration conf, String name,
        Collection<? extends String> values) {
    Collection<String> tmpfiles = conf.getStringCollection(name);
    tmpfiles.addAll(values);
    conf.setStrings(name, tmpfiles.toArray(new String[tmpfiles.size()]));
}