1 /*

     2  * Copyright 1997 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /* @test

    25    @bug 4089062

    26    @summary A String created from a StringBuffer can be overwritten

    27    if setLength() to a value less than the buffer length is called

    28    on the StringBuffer and then the StringBuffer is appended to.

    29    @author Robert Field

    30 */

    31 

    32 public class SetLength {

    33     public static void main(String[] argv) throws Exception {

    34         StringBuffer active = new StringBuffer();

    35         active.append("first one");

    36         String a = active.toString();

    37         active.setLength(0);

    38         active.append("second");

    39         String b = active.toString();

    40         active.setLength(0);

    41         System.out.println("first: " + a);

    42         System.out.println("second: " + b);

    43         if (!a.equals("first one")) {

    44             throw new Exception("StringBuffer.setLength() overwrote string");

    45         }

    46     }

    47 }