Here you can find the source of merge(String[] array)
public static String merge(String[] array)
//package com.java2s; /**//from w ww . j a va 2 s .com Copyright (C) 2015 FoxGenesis This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ import java.util.Arrays; public class Main { public static String merge(String[] array) { return Arrays.asList(array).stream().reduce((a, b) -> a + b).get(); } }