Quelle FinalizeInflater.java Sprache: JAVA

/*
* Copyright (c) 2010, 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 7003462
   @summary Make sure cached Inflater does not get finalized.
*/

import java.io.File;
import java.io.InputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class FinalizeInflater {

    public static void main(String[] args) throws Throwable {
        try (ZipFile zf = new ZipFile(new File(System.getProperty("test.src", "."), "input.zip")))
        {
            ZipEntry ze = zf.getEntry("ReadZip.java");
            read(zf.getInputStream(ze));
            System.gc();
            System.runFinalization();
            System.gc();
            // read again
            read(zf.getInputStream(ze));
        }
    }

    private static void read(InputStream is)
        throws IOException
    {
        Wrapper wrapper = new Wrapper(is);
        byte[] buffer = new byte[32];
        try {
            while(is.read(buffer)>0){}
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }

    static class Wrapper{
        InputStream is;
        public Wrapper(InputStream is) {
            this.is = is;
        }

        @Override
        protected void finalize() throws Throwable {
            super.finalize();
            is.close();
        }
    }
}

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