jdk/test/java/lang/StringBuffer/SetLength.java
author duke
Sat, 01 Dec 2007 00:00:00 +0000
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child 5506 202f599c92aa
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/*
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 * Copyright 1997 Sun Microsystems, Inc.  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.
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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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 */
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/* @test
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   @bug 4089062
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   @summary A String created from a StringBuffer can be overwritten
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   if setLength() to a value less than the buffer length is called
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   on the StringBuffer and then the StringBuffer is appended to.
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   @author Robert Field
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*/
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public class SetLength {
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    public static void main(String[] argv) throws Exception {
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        StringBuffer active = new StringBuffer();
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        active.append("first one");
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        String a = active.toString();
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        active.setLength(0);
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        active.append("second");
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        String b = active.toString();
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        active.setLength(0);
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        System.out.println("first: " + a);
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        System.out.println("second: " + b);
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        if (!a.equals("first one")) {
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            throw new Exception("StringBuffer.setLength() overwrote string");
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        }
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    }
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}