71 lines
2.3 KiB
Java
71 lines
2.3 KiB
Java
/*
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* Copyright (c) 2004, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* Testcase that does a defineClass with a NULL name on HelloWorld.class */
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import java.io.*;
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public class DefineClass extends ClassLoader {
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public static void main(String args[]) {
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DefineClass t = new DefineClass();
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t.run(args);
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}
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public void run(String args[]) {
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Class n;
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byte b[] = new byte[10000];
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int len = 0;
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String cdir;
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String cfile;
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/* Class is found here: */
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cdir = System.getProperty("test.classes", ".");
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cfile = cdir + java.io.File.separator + "HelloWorld.class";
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try {
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/* Construct byte array with complete class image in it. */
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FileInputStream fis = new FileInputStream(cfile);
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int nbytes;
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do {
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nbytes = fis.read(b, len, b.length-len);
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if ( nbytes > 0 ) {
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len += nbytes;
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}
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} while ( nbytes > 0 );
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} catch ( Throwable x ) {
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System.err.println("Cannot find " + cfile);
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x.printStackTrace();
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}
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/* Define the class with null for the name */
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n = defineClass(null, b, 0, len);
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/* Try to create an instance of it */
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try {
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n.newInstance();
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} catch ( Throwable x ) {
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x.printStackTrace();
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}
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}
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}
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