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.
*/
import java.io.*;
import java.net.*;
public class B5077773 {
public static void main(String[] args) throws Exception {
URLClassLoader loader = new URLClassLoader (new URL[] {new URL("file:foo.jar")});
/* This test will fail if the file below is removed from rt.jar */
InputStream is = loader.getResourceAsStream ("javax/swing/text/rtf/charsets/mac.txt");
if (is == null) {
System.out.println ("could not find mac.txt");
return;
}
int c=0;
while ((is.read()) != -1) {
c++;
}
if (c == 26) /* size of bad file */ {
throw new RuntimeException ("Wrong mac.txt file was loaded");
}
}
}