openjdk源码
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/*
* Copyright (c) 2004, 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 4654722
* @summary Ensure that ridiculously tiny buffers work with
* Channels.newReader
*/
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.charset.*;
public class TinyBuffers {
private static Charset cs = Charset.forName("UTF-16");
private static void test(int sz) throws Exception {
ByteArrayInputStream bis = new ByteArrayInputStream(new byte[100]);
ReadableByteChannel ch = Channels.newChannel(bis);
Reader r = Channels.newReader(ch, cs.newDecoder(), sz);
char [] arr = new char[100];
System.out.println(r.read(arr, 0, arr.length));
}
public static void main(String[] args) throws Exception {
for (int i = -2; i < 10; i++)
test(i);
}
}