Example usage for java.util List addAll

Introduction

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

Prototype

boolean addAll(Collection<? extends E> c);

Source Link

Document

Appends all of the elements in the specified collection to the end of this list, in the order that they are returned by the specified collection's iterator (optional operation).

Usage

From source file:Main.java

public static <T> List<T> varargToList(final T first, final T[] others) {
    final List<T> list = new ArrayList<>(others.length + 1);
    list.add(first);/*from ww w .j ava 2s  .  co  m*/
    list.addAll(Arrays.asList(others));
    return list;
}

From source file:Main.java

/**
 * Return a new list with element prepended to previous list.
 *//*from   w  ww  .ja  va2s . com*/
public static <A> List<A> prependToList(A elem, List<A> list) {
    List<A> answer = new ArrayList<A>(list.size() + 1);
    answer.add(elem);
    answer.addAll(list);
    return answer;
}

From source file:Main.java

public static <I> List<I> flatten(final List<List<I>> in) {
    final List<I> retVal = new ArrayList<I>();
    for (final List<I> list : in) {
        retVal.addAll(list);
    }//from   w w w  .j  a va 2 s  .c  o  m
    return retVal;
}

From source file:co.kademi.kdom.MultiJexlContext.java

public static MultiJexlContext build(JexlContext... contexts) {
    List<JexlContext> list = new ArrayList<>();
    list.addAll(Arrays.asList(contexts));
    return new MultiJexlContext(list);
}

From source file:Main.java

public static List<Object> combineArrays(Object[]... objects) {
    List<Object> list = new ArrayList<Object>();
    for (int i = 0; i < objects.length; i++) {
        list.addAll(Arrays.asList(objects[i]));
    }/*from ww w .ja va  2  s.  c o m*/
    return list;
}

From source file:Main.java

public static List<String> removeDuplicate(List<String> list) {
    HashSet<String> hashSet = new HashSet<String>(list);
    list.clear();//from  www. j  a  v a  2 s  .c om
    list.addAll(hashSet);
    return list;
}

From source file:Main.java

@SuppressWarnings({ "rawtypes", "unchecked" })
public static String[] joinStringArray(String[]... arrays) {
    int size = 0;
    for (String[] array : arrays) {
        size += array.length;//from   w w  w  .j  a va 2s  . c  o m
    }
    java.util.List list = new java.util.ArrayList(size);
    for (String[] array : arrays) {
        list.addAll(java.util.Arrays.asList(array));
    }
    return (String[]) list.toArray(new String[size]);
}

From source file:Main.java

public static <T> List<T> flatten(List<? extends Collection<T>> list) {
    List<T> flat = new ArrayList<>();
    for (Collection<T> collection : list) {
        flat.addAll(collection);
    }//w w  w.j av a2s  .com
    return flat;
}

From source file:Main.java

public static <T> List<T> union(List<List<T>> collections) {
    if (collections.size() <= 0) {
        return new LinkedList<>();
    } else if (collections.size() == 1) {
        return collections.get(0);
    } else {//from w  w w.jav a  2 s.  c o m
        List<T> result = new LinkedList<>();
        for (List<T> list : collections) {
            result.addAll(list);
        }
        return result;
    }
}

From source file:Main.java

/**
 * Merges the given two lists in a new list, but without duplicates.
 *///from w  ww .  j  a v  a  2 s  .  com
public static <T> List<T> mergeNoDuplicates(List<T> sourceList1, List<T> sourceList2) {
    List<T> ret = alist(sourceList1.size() + sourceList2.size());
    ret.addAll(sourceList1);
    for (T e : sourceList2) {
        if (false == ret.contains(e))
            ret.add(e);
    }
    return ret;
}