657b9db1ba
Updated files with 2011, 2012 and 2013 years according to the file's last updated date Reviewed-by: tbell, lancea, chegar
74 lines
2.5 KiB
Java
74 lines
2.5 KiB
Java
/*
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* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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// Append files to one another without duplicating any lines.
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.util.HashMap;
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public class Combine {
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private static HashMap map = new HashMap(10007);
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private static void appendFile(String fileName, boolean keep) {
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try {
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BufferedReader br = new BufferedReader(new FileReader(fileName));
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// Read a line at a time. If the line does not appear in the
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// hashmap, print it and add it to the hashmap, so that it will
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// not be repeated.
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lineLoop:
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while (true) {
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String line = br.readLine();
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if (line == null)
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break;
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if (keep || !map.containsKey(line)) {
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System.out.println(line);
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map.put(line,line);
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}
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}
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br.close();
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} catch (Exception e) {
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e.printStackTrace();
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System.exit(1);
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}
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}
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public static void main(String[] args) {
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if (args.length < 2) {
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System.err.println("Usage: java Combine file1 file2 ...");
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System.exit(2);
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}
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for (int i = 0; i < args.length; ++i)
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appendFile(args[i], i == 0);
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}
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}
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