DataInput.java: Merge with Classpath.

* java/io/DataInput.java:  Merge with Classpath.
	* java/io/DataOutput.java:  Idem.
	* java/io/FilenameFilter.java:  Idem.
	* java/io/Serializable.java:  Idem.
	* java/lang/Cloneable.java:  Idem.
	* java/lang/Comparable.java:  Idem.
	* java/lang/Runnable.java:  Idem.
	* java/lang/reflect/Member.java:  Idem.
	* java/net/ContentHandlerFactory.java:  Idem.
	* java/net/FileNameMap.java:  Idem.
	* java/net/SocketImplFactory.java:  Idem.
	* java/net/SocketOptions.java:  Idem.
	* java/net/URLStreamHandlerFactory.java:  Idem.

From-SVN: r45910

libjava/java/lang/Cloneable.java

@@ -1,23 +1,76 @@
-/* Copyright (C) 1998, 1999  Free Software Foundation
+/* Cloneable.java -- Interface for marking objects cloneable by Object.clone()
+   Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.
 
-   This file is part of libgcj.
+This file is part of GNU Classpath.
 
-This software is copyrighted work licensed under the terms of the
-Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
-details.  */
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
  
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+
 package java.lang;
- 
-/**
- * @author Warren Levy <warrenl@cygnus.com>
- * @date September 2, 1998.  
- */
+
 /* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
  * "The Java Language Specification", ISBN 0-201-63451-1
  * plus online API docs for JDK 1.2 beta from http://www.javasoft.com.
  * Status:  Believed complete and correct.
  */
- 
+
+/**
+ * This interface should be implemented by classes wishing to
+ * support of override <code>Object.clone()</code>.  The default
+ * behaviour of <code>clone()</code> performs a shallow copy, but
+ * subclasses often change this to perform a deep copy.  Therefore,
+ * it is a good idea to document how deep your clone will go.
+ * If <code>clone()</code> is called on an object which does not
+ * implement this interface, a <code>CloneNotSupportedException</code>
+ * will be thrown.
+ * <p>
+ *
+ * This interface is simply a tagging interface; it carries no
+ * requirements on methods to implement.  However, it is typical for
+ * a Cloneable class to implement at least <code>equals</code>,
+ * <code>hashCode</code>, and <code>clone</code>, sometimes
+ * increasing the accessibility of clone to be public. The typical
+ * implementation of <code>clone</code> invokes <code>super.clone()</code>
+ * rather than a constructor, but this is not a requirement.
+ * <p>
+ *
+ * If an object that implement Cloneable should not be cloned,
+ * simply override the <code>clone</code> method to throw a
+ * <code>CloneNotSupportedException</code>.
+ * <p>
+ *
+ * All array types implement Cloneable, and have a public
+ * <code>clone</code> method that will never fail with a
+ * <code>CloneNotSupportedException</code>.
+ *
+ * @since 1.0
+ * @author Paul Fisher
+ * @author Eric Blake <ebb9@email.byu.edu>
+ * @author Warren Levy <warrenl@cygnus.com>
+ *
+ * @see Object#clone()
+ * @see CloneNotSupportedException
+ */
 public interface Cloneable
 {
+  // Tagging interface only.
 }