flatten list of list to single List - Android java.util

Android examples for java.util:List

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Description

flatten list of list to single List

Demo Code

/**/*w w w  .  ja v a2 s. c om*/
 * Copyright (c) 2011 Loganalysis team and contributors
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Raffael Schmid - initial API and implementation
 */
//package com.book2s;

import java.util.ArrayList;

import java.util.List;

public class Main {
    public static void main(String[] argv) {
        List in = java.util.Arrays.asList("asdf", "book2s.com");
        System.out.println(flatten(in));
    }

    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);
        }
        return retVal;
    }
}

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