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Java example source code file (EncodedMultiByteChar.java)

This example Java source code file (EncodedMultiByteChar.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bufferedreader, encodedmultibytechar, failed, fileoutputstream, ioexception, net, network, runtimeexception, string, this, unsupportedencodingexception, url, urlconnection, utf-8

The EncodedMultiByteChar.java Java example source code

/*
 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**
 * @test
 * @bug 6521166
 * @summary Exception when opening file URLConnection with percent encoded 4 byte UTF8 char
 */

import java.net.*;
import java.io.*;

/* java.lang.IllegalArgumentException if fails */

public class EncodedMultiByteChar
{
    static String filename = "EncodedMultiByteChar" + new String(Character.toChars(0x2123D));
    static String urlStr;
    static String message = "This is a message";

    static {
        try {
            urlStr = "file://" + System.getProperty("java.io.tmpdir") + "/EncodedMultiByteChar" +
                      URLEncoder.encode(new String(Character.toChars(0x2123D)), "UTF-8") + ".txt";
        } catch (UnsupportedEncodingException e) {
            assert false;
        }
    }

    public static void main(String[] args) {
        File file = null;
        try {
            //Create a file with a 4 byte UTF8 character in its name.
            file = new File(System.getProperty("java.io.tmpdir") + File.separator + filename + ".txt");
            file.createNewFile();
            file.deleteOnExit();

            FileOutputStream fos = new FileOutputStream(file);
            fos.write(message.getBytes("UTF-8"));
            fos.close();
        } catch (IOException e) {
            System.out.println("Failed to create test file ");
            e.printStackTrace();
            return;
        }

        System.out.println("file = " + file);

        try {
            System.out.println("URL = " + urlStr);
            URL url = new URL(urlStr);
            URLConnection conn = url.openConnection();
            BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));

            String line;
            while ((line = reader.readLine()) != null) {
                if (!line.equals(message)) {
                    throw new RuntimeException("Failed: read \"" + line + "\" from file");
                }
            }
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }
}

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