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diff --git a/src/main/javassist/Dump.java b/src/main/javassist/Dump.java
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+/*
+ * This file is part of the Javassist toolkit.
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * either http://www.mozilla.org/MPL/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Javassist.
+ *
+ * The Initial Developer of the Original Code is Shigeru Chiba.  Portions
+ * created by Shigeru Chiba are Copyright (C) 1999-2003 Shigeru Chiba.
+ * All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * The development of this software is supported in part by the PRESTO
+ * program (Sakigake Kenkyu 21) of Japan Science and Technology Corporation.
+ */
+
+package javassist;
+
+import java.io.*;
+import javassist.bytecode.ClassFile;
+import javassist.bytecode.ClassFileWriter;
+
+/**
+ * Dump is a tool for viewing the class definition in the given
+ * class file.  Unlike the JDK javap tool, Dump works even if
+ * the class file is broken.
+ *
+ * <p>For example,
+ * <ul><pre>% java javassist.Dump foo.class</pre></ul>
+ *
+ * <p>prints the contents of the constant pool and the list of methods
+ * and fields.
+ */
+public class Dump {
+    private Dump() {}
+
+    /**
+     * Main method.
+     *
+     * @param args[0]		class file name.
+     */
+    public static void main(String[] args) throws Exception {
+	if (args.length != 1) {
+	    System.err.println("Usage: java Dump <class file name>");
+	    return;
+	}
+
+	DataInputStream in = new DataInputStream(
+					 new FileInputStream(args[0]));
+	ClassFile w = new ClassFile(in);
+	PrintWriter out = new PrintWriter(System.out, true);
+	out.println("*** constant pool ***");
+	w.getConstPool().print(out);
+	out.println();
+	out.println("*** members ***");
+	ClassFileWriter.print(w, out);
+    }
+}