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Java example source code file (ConvertSingle.java)

This example Java source code file (ConvertSingle.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

bais, bufferedreader, bytearrayinputstream, bytetocharunicode, convertsingle, exception, inputstreamreader, isr, malformedinputexception, string

The ConvertSingle.java Java example source code

/*
 * Copyright (c) 2008, 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 4094987
   @summary Verify that malformed expression exceptions are thrown
       but no internal errors in certain pathologial cases.

 */


import java.io.*;
import java.nio.charset.*;

public class ConvertSingle {

    public static void main(String args[]) throws Exception {
        // This conversion is pathologically bad - it is attempting to
        // read unicode from an ascii encoded string.
        // The orignal bug: A internal error in ISR results if the
        // byte counter in ByteToCharUnicode
        // is not advanced as the input is consumed.

        try{
            String s = "\n";
            byte ss[] = null;
            String sstring = "x";
            ss = s.getBytes();
            ByteArrayInputStream BAIS = new ByteArrayInputStream(ss);
            InputStreamReader ISR = new InputStreamReader(BAIS, "Unicode");
            BufferedReader BR = new BufferedReader(ISR);
            sstring = BR.readLine();
            BR.close();
            System.out.println(sstring);
        } catch (MalformedInputException e){
            // Right error
            return;
        } catch (java.lang.InternalError e) {
            throw new Exception("ByteToCharUnicode is failing incorrectly for "
                                + " single byte input");
        }

    }

}

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