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

4 files changed, 734 insertions, 83 deletions

diff --git a/libjava/java/io/DataInput.java b/libjava/java/io/DataInput.java
index 5930e49..caea682 100644
--- a/libjava/java/io/DataInput.java
+++ b/libjava/java/io/DataInput.java
@@ -1,41 +1,461 @@
-/* Copyright (C) 1998, 1999  Free Software Foundation
+/* DataInput.java -- Interface for reading data from a stream
+   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.
  
-package java.io;
+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.
 
-/**
- * @author Warren Levy <warrenl@cygnus.com>
- * @date October 2, 1998.  
- */
+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.io;
 
 /* 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 is implemented by classes that can data from streams 
+  * into Java primitive types. 
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  * @author Warren Levy <warrenl@cygnus.com>
+  */
 public interface DataInput
 {
-  public boolean readBoolean() throws IOException;
-  public byte readByte() throws IOException;
-  public char readChar() throws IOException;
-  public double readDouble() throws IOException;
-  public float readFloat() throws IOException;
-  public void readFully(byte[] b)
-    throws IOException, NullPointerException;
-  public void readFully(byte[] b, int off, int len)
-    throws IOException, NullPointerException, IndexOutOfBoundsException;
-  public int readInt() throws IOException;
-  public String readLine() throws IOException;
-  public long readLong() throws IOException;
-  public short readShort() throws IOException;
-  public int readUnsignedByte() throws IOException;
-  public int readUnsignedShort() throws IOException;
-  public String readUTF() throws IOException;
-  public int skipBytes(int n) throws IOException;
-}
+
+/**
+  * This method reads a Java boolean value from an input stream.  It does
+  * so by reading a single byte of data.  If that byte is zero, then the
+  * value returned is <code>false</code>.  If the byte is non-zero, then
+  * the value returned is <code>true</code>.
+  * <p>
+  * This method can read a <code>boolean</code> written by an object
+  * implementing the <code>writeBoolean()</code> method in the
+  * <code>DataOutput</code> interface.
+  *
+  * @return The <code>boolean</code> value read
+  *
+  * @exception EOFException If end of file is reached before reading the boolean
+  * @exception IOException If any other error occurs
+  */
+boolean
+readBoolean() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads a Java byte value from an input stream.  The value
+  * is in the range of -128 to 127.
+  * <p>
+  * This method can read a <code>byte</code> written by an object
+  * implementing the 
+  * <code>writeByte()</code> method in the <code>DataOutput</code> interface.
+  * <p>
+  * @return The <code>byte</code> value read
+  *
+  * @exception EOFException If end of file is reached before reading the byte
+  * @exception IOException If any other error occurs
+  *
+  * @see DataOutput
+  */
+byte
+readByte() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads 8 unsigned bits into a Java <code>int</code> value from
+  * the stream. The value returned is in the range of 0 to 255.
+  * <p>
+  * This method can read an unsigned byte written by an object implementing the
+  * <code>writeUnsignedByte()</code> method in the <code>DataOutput</code>
+  * interface.
+  *
+  * @return The unsigned bytes value read as a Java <code>int</code>.
+  *
+  * @exception EOFException If end of file is reached before reading the value
+  * @exception IOException If any other error occurs
+  *
+  * @see DataOutput
+  */
+int
+readUnsignedByte() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads a Java <code>char</code> value from an input stream.  
+  * It operates by reading two bytes from the stream and converting them to 
+  * a single 16-bit Java <code>char</code>.  The two bytes are stored most
+  * significant byte first (i.e., "big endian") regardless of the native
+  * host byte ordering. 
+  * <p>
+  * As an example, if <code>byte1</code> and <code>byte2</code> represent the
+  * first and second byte read from the stream respectively, they will be
+  * transformed to a <code>char</code> in the following manner:
+  * <p>
+  * <code>(char)((byte1 << 8) + byte2)</code>
+  * <p>
+  * This method can read a <code>char</code> written by an object implementing
+  * the
+  * <code>writeChar()</code> method in the <code>DataOutput</code> interface.
+  *
+  * @return The <code>char</code> value read 
+  *
+  * @exception EOFException If end of file is reached before reading the char
+  * @exception IOException If any other error occurs
+  *
+  * @see DataOutput
+  */
+char
+readChar() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads a signed 16-bit value into a Java in from the stream.
+  * It operates by reading two bytes from the stream and converting them to 
+  * a single 16-bit Java <code>short</code>.  The two bytes are stored most
+  * significant byte first (i.e., "big endian") regardless of the native
+  * host byte ordering. 
+  * <p>
+  * As an example, if <code>byte1</code> and <code>byte2</code> represent the
+  * first and second byte read from the stream respectively, they will be
+  * transformed to a <code>short</code> in the following manner:
+  * <p>
+  * <code>(short)((byte1 << 8) + byte2)</code>
+  * <p>
+  * The value returned is in the range of -32768 to 32767.
+  * <p>
+  * This method can read a <code>short</code> written by an object implementing
+  * the <code>writeShort()</code> method in the <code>DataOutput</code>
+  * interface.
+  *
+  * @return The <code>short</code> value read
+  *
+  * @exception EOFException If end of file is reached before reading the value
+  * @exception IOException If any other error occurs
+  *
+  * @see DataOutput
+  */
+short
+readShort() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads 16 unsigned bits into a Java int value from the stream.
+  * It operates by reading two bytes from the stream and converting them to 
+  * a single Java <code>int</code>.  The two bytes are stored most
+  * significant byte first (i.e., "big endian") regardless of the native
+  * host byte ordering. 
+  * <p>
+  * As an example, if <code>byte1</code> and <code>byte2</code> represent the
+  * first and second byte read from the stream respectively, they will be
+  * transformed to an <code>int</code> in the following manner:
+  * <p>
+  * <code>(int)((byte1 << 8) + byte2)</code>
+  * <p>
+  * The value returned is in the range of 0 to 65535.
+  * <p>
+  * This method can read an unsigned short written by an object implementing
+  * the <code>writeUnsignedShort()</code> method in the <code>DataOutput</code>
+  * interface.
+  *
+  * @return The unsigned short value read as a Java <code>int</code>.
+  *
+  * @exception EOFException If end of file is reached before reading the value
+  * @exception IOException If any other error occurs
+  */
+int
+readUnsignedShort() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads a Java <code>int</code> value from an input stream
+  * It operates by reading four bytes from the stream and converting them to 
+  * a single Java <code>int</code>.  The bytes are stored most
+  * significant byte first (i.e., "big endian") regardless of the native
+  * host byte ordering. 
+  * <p>
+  * As an example, if <code>byte1</code> through <code>byte4</code> represent
+  * the first four bytes read from the stream, they will be
+  * transformed to an <code>int</code> in the following manner:
+  * <p>
+  * <code>(int)((byte1 << 24) + (byte2 << 16) + (byte3 << 8) + byte4))</code>
+  * <p>
+   The value returned is in the range of -2147483648 to 2147483647.
+  * <p>
+  * This method can read an <code>int</code> written by an object implementing
+  * the <code>writeInt()</code> method in the <code>DataOutput</code> interface.
+  *
+  * @return The <code>int</code> value read
+  *
+  * @exception EOFException If end of file is reached before reading the int
+  * @exception IOException If any other error occurs
+  *
+  * @see DataOutput
+  */
+int
+readInt() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads a Java <code>long</code> value from an input stream
+  * It operates by reading eight bytes from the stream and converting them to 
+  * a single Java <code>long</code>.  The bytes are stored most
+  * significant byte first (i.e., "big endian") regardless of the native
+  * host byte ordering. 
+  * <p>
+  * As an example, if <code>byte1</code> through <code>byte8</code> represent
+  * the first eight bytes read from the stream, they will be
+  * transformed to an <code>long</code> in the following manner:
+  * <p>
+  * <code>(long)((byte1 << 56) + (byte2 << 48) + (byte3 << 40) + 
+  * (byte4 << 32) + (byte5 << 24) + (byte6 << 16) + (byte7 << 8) + byte9))
+  * </code>
+  * <p>
+  * The value returned is in the range of -9223372036854775808 to
+  * 9223372036854775807.
+  * <p>
+  * This method can read an <code>long</code> written by an object implementing
+  * the <code>writeLong()</code> method in the <code>DataOutput</code>
+  * interface.
+  *
+  * @return The <code>long</code> value read
+  *
+  * @exception EOFException If end of file is reached before reading the long
+  * @exception IOException If any other error occurs
+  *
+  * @see DataOutput
+  */
+long
+readLong() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads a Java float value from an input stream.  It operates
+  * by first reading an <code>int</code> value from the stream by calling the
+  * <code>readInt()</code> method in this interface, then converts that
+  * <code>int</code> to a <code>float</code> using the
+  * <code>intBitsToFloat</code> method in the class
+  * <code>java.lang.Float</code>.
+  * <p>
+  * This method can read a <code>float</code> written by an object implementing
+  * the <code>writeFloat()</code> method in the <code>DataOutput</code>
+  * interface.
+  *
+  * @return The <code>float</code> value read
+  *
+  * @exception EOFException If end of file is reached before reading the float
+  * @exception IOException If any other error occurs
+  *
+  * @see java.lang.Float
+  * @see DataOutput
+  */
+float
+readFloat() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads a Java double value from an input stream.  It operates
+  * by first reading a <code>long</code> value from the stream by calling the
+  * <code>readLong()</code> method in this interface, then converts that
+  * <code>long</code> to a <code>double</code> using the
+  * <code>longBitsToDouble</code> method in the class
+  * <code>java.lang.Double</code>.
+  * <p>
+  * This method can read a <code>double</code> written by an object
+  * implementing the <code>writeDouble()</code> method in the
+  * <code>DataOutput</code> interface.
+  *
+  * @return The <code>double</code> value read
+  *
+  * @exception EOFException If end of file is reached before reading the double
+  * @exception IOException If any other error occurs
+  *
+  * @see java.lang.Double
+  * @see DataOutput
+  */
+double
+readDouble() throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads the next line of text data from an input stream.
+  * It operates by reading bytes and converting those bytes to <code>char</code>
+  * values by treating the byte read as the low eight bits of the
+  * <code>char</code> and using 0 as the high eight bits.  Because of this,
+  * it does not support the full 16-bit Unicode character set.
+  * <P>
+  * The reading of bytes ends when either the end of file or a line terminator
+  * is encountered.  The bytes read are then returned as a <code>String</code>.
+  * A line terminator is a byte sequence consisting of either 
+  * <code>\r</code>, <code>\n</code> or <code>\r\n</code>.  These termination
+  * charaters are discarded and are not returned as part of the string.
+  * <p>
+  * This method can read data that was written by an object implementing the
+  * <code>writeLine()</code> method in <code>DataOutput</code>.
+  *
+  * @return The line read as a <code>String</code>
+  *
+  * @exception IOException If an error occurs
+  *
+  * @see DataOutput
+  */
+String
+readLine() throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads a <code>String</code> from an input stream that is
+  * encoded in a modified UTF-8 format.  This format has a leading two byte
+  * sequence that contains the remaining number of bytes to read.  This two byte
+  * sequence is read using the <code>readUnsignedShort()</code> method of this
+  * interface.
+  *
+  * After the number of remaining bytes have been determined, these bytes
+  * are read an transformed into <code>char</code> values.  These
+  * <code>char</code> values are encoded in the stream using either a one, two,
+  * or three byte format.
+  * The particular format in use can be determined by examining the first
+  * byte read.  
+  * <p>
+  * If the first byte has a high order bit of 0, then
+  * that character consists on only one byte.  This character value consists
+  * of seven bits that are at positions 0 through 6 of the byte.  As an
+  * example, if <code>byte1</code> is the byte read from the stream, it would
+  * be converted to a <code>char</code> like so:
+  * <p>
+  * <code>(char)byte1</code>
+  * <p>
+  * If the first byte has 110 as its high order bits, then the 
+  * character consists of two bytes.  The bits that make up the character
+  * value are in positions 0 through 4 of the first byte and bit positions
+  * 0 through 5 of the second byte.  (The second byte should have 
+  * 10 as its high order bits).  These values are in most significant
+  * byte first (i.e., "big endian") order.
+  * <p>
+  * As an example, if <code>byte1</code> and <code>byte2</code> are the first
+  * two bytes read respectively, and the high order bits of them match the
+  * patterns which indicate a two byte character encoding, then they would be
+  * converted to a Java <code>char</code> like so:
+  * <p>
+  * <code>(char)(((byte1 & 0x1F) << 6) + (byte2 & 0x3F))</code>
+  * <p>
+  * If the first byte has a 1110 as its high order bits, then the
+  * character consists of three bytes.  The bits that make up the character
+  * value are in positions 0 through 3 of the first byte and bit positions
+  * 0 through 5 of the other two bytes.  (The second and third bytes should
+  * have 10 as their high order bits).  These values are in most
+  * significant byte first (i.e., "big endian") order.
+  * <p>
+  * As an example, if <code>byte1</code>, <code>byte2</code>, and
+  * <code>byte3</code> are the three bytes read, and the high order bits of
+  * them match the patterns which indicate a three byte character encoding,
+  * then they would be converted to a Java <code>char</code> like so:
+  *
+  * <code>
+  * (char)(((byte1 & 0x0F) << 12) + ((byte2 & 0x3F) + (byte3 & 0x3F))
+  * </code>
+  *
+  * Note that all characters are encoded in the method that requires the
+  * fewest number of bytes with the exception of the character with the
+  * value of <code>\<llll>u0000</code> which is encoded as two bytes.  This is
+  * a modification of the UTF standard used to prevent C language style
+  * <code>NUL</code> values from appearing in the byte stream.
+  * <p>
+  * This method can read data that was written by an object implementing the
+  * <code>writeUTF()</code> method in <code>DataOutput</code>.
+  * 
+  * @returns The <code>String</code> read
+  *
+  * @exception EOFException If end of file is reached before reading the String
+  * @exception UTFDataFormatException If the data is not in UTF-8 format
+  * @exception IOException If any other error occurs
+  *
+  * @see DataOutput
+  */
+String
+readUTF() throws EOFException, UTFDataFormatException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads raw bytes into the passed array until the array is
+  * full.  Note that this method blocks until the data is available and
+  * throws an exception if there is not enough data left in the stream to
+  * fill the buffer
+  *
+  * @param buf The buffer into which to read the data
+  *
+  * @exception EOFException If end of file is reached before filling the buffer
+  * @exception IOException If any other error occurs
+  */
+void
+readFully(byte[] buf) throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method reads raw bytes into the passed array <code>buf</code> starting
+  * <code>offset</code> bytes into the buffer.  The number of bytes read will be
+  * exactly <code>len</code>.  Note that this method blocks until the data is 
+  * available and * throws an exception if there is not enough data left in 
+  * the stream to read <code>len</code> bytes.
+  *
+  * @param buf The buffer into which to read the data
+  * @param offset The offset into the buffer to start storing data
+  * @param len The number of bytes to read into the buffer
+  *
+  * @exception EOFException If end of file is reached before filling the buffer
+  * @exception IOException If any other error occurs
+  */
+void
+readFully(byte[] buf, int offset, int len) throws EOFException, IOException;
+
+/*************************************************************************/
+
+/**
+  * This method skips and discards the specified number of bytes in an
+  * input stream
+  *
+  * @param num_bytes The number of bytes to skip
+  *
+  * @return The number of bytes actually skipped, which will always be
+  *         <code>num_bytes</code>
+  *
+  * @exception EOFException If end of file is reached before all bytes can be
+  *                         skipped
+  * @exception IOException If any other error occurs
+  */
+int
+skipBytes(int n) throws EOFException, IOException;
+
+} // interface DataInput
diff --git a/libjava/java/io/DataOutput.java b/libjava/java/io/DataOutput.java
index d0def85..bb6c3c6 100644
--- a/libjava/java/io/DataOutput.java
+++ b/libjava/java/io/DataOutput.java
@@ -1,44 +1,217 @@
-// DataOutput.java - Interface for data output conversions.
+/* DataOutput.java -- Interface for writing data from a stream
+   Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.
 
-/* Copyright (C) 1998, 1999  Free Software Foundation
+This file is part of GNU Classpath.
 
-   This file is part of libgcj.
+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.
 
-This software is copyrighted work licensed under the terms of the
-Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
-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.
 
-package java.io;
+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. */
 
-/**
- * @author Tom Tromey <tromey@cygnus.com>
- * @date September 24, 1998 
- */ 
+
+package java.io;
 
 /* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
  * "The Java Language Specification", ISBN 0-201-63451-1
  * Status:  Complete to version 1.1.
  */
 
+/**
+  * This interface is implemented by classes that can wrte data to streams 
+  * from Java primitive types.
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  * @author Tom Tromey <tromey@cygnus.com>
+  */
 public interface DataOutput
 {
-  public abstract void write (int b) throws IOException;
-  public abstract void write (byte[] b)
-    throws IOException, NullPointerException;
-  public abstract void write (byte[] b, int off, int len)
-    throws IOException, NullPointerException, IndexOutOfBoundsException;
-  public abstract void writeBoolean (boolean v) throws IOException;
-  public abstract void writeByte (int v) throws IOException;
-  public abstract void writeShort (int v) throws IOException;
-  public abstract void writeChar (int v) throws IOException;
-  public abstract void writeInt (int v) throws IOException;
-  public abstract void writeLong (long v) throws IOException;
-  public abstract void writeFloat (float v) throws IOException;
-  public abstract void writeDouble (double v) throws IOException;
-  public abstract void writeBytes (String s)
-    throws IOException, NullPointerException;
-  public abstract void writeChars (String s)
-    throws IOException, NullPointerException;
-  public abstract void writeUTF (String s)
-    throws IOException, NullPointerException;
-}
+
+/**
+  * This method writes a Java boolean value to an output stream
+  *
+  * @param value The boolean value to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeBoolean(boolean value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a Java byte value to an output stream
+  *
+  * @param value The int value to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeByte(int value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a Java char value to an output stream
+  *
+  * @param value The char value to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeChar(int value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a Java int value to an output stream as a 16 bit value
+  *
+  * @param value The int value to write as a 16-bit value
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeShort(int value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a Java int value to an output stream
+  *
+  * @param value The int value to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeInt(int value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a Java long value to an output stream
+  *
+  * @param value The long value to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeLong(long value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a Java float value to an output stream
+  *
+  * @param value The float value to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeFloat(float value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a Java double value to an output stream
+  *
+  * @param value The double value to write
+  *
+  * @exception IOException If any other error occurs
+  */
+void
+writeDouble(double value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a String to an output stream as an array of bytes
+  *
+  * @param value The String to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeBytes(String value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a String to an output stream as an array of char's
+  *
+  * @param value The String to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeChars(String value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes a String to an output stream encoded in
+  * UTF-8 format.
+  *
+  * @param value The String to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+writeUTF(String value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes an 8-bit value (passed into the method as a Java
+  * int) to an output stream.
+  *
+  * @param value The byte to write to the output stream
+  *
+  * @exception IOException If an error occurs
+  */
+void
+write(int value) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes the raw byte array passed in to the output stream.
+  *
+  * @param buf The byte array to write
+  *
+  * @exception IOException If an error occurs
+  */
+void
+write(byte[] buf) throws IOException;
+
+/*************************************************************************/
+
+/**
+  * This method writes raw bytes from the passed array <code>buf</code> starting
+  * <code>offset</code> bytes into the buffer.  The number of bytes written will be
+  * exactly <code>len</code>. 
+  *
+  * @param buf The buffer from which to write the data
+  * @param offset The offset into the buffer to start writing data from
+  * @param len The number of bytes to write from the buffer to the output stream
+  *
+  * @exception IOException If any other error occurs
+  */
+void
+write(byte[] buf, int offset, int len) throws IOException;
+
+} // interface DataOutput
diff --git a/libjava/java/io/FilenameFilter.java b/libjava/java/io/FilenameFilter.java
index 05e7fd0..3e9eb90 100644
--- a/libjava/java/io/FilenameFilter.java
+++ b/libjava/java/io/FilenameFilter.java
@@ -1,26 +1,62 @@
-// FilenameFilter.java - Compute subset of list of file names
+/* FilenameFilter.java -- Filter a list of filenames
+   Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.
 
-/* Copyright (C) 1998, 1999  Free Software Foundation
+This file is part of GNU Classpath.
 
-   This file is part of libgcj.
+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.
 
-This software is copyrighted work licensed under the terms of the
-Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
-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.
 
-package java.io;
+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. */
 
-/**
- * @author Tom Tromey <tromey@cygnus.com>
- * @date September 24, 1998 
- */
+
+package java.io;
 
 /* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
  * "The Java Language Specification", ISBN 0-201-63451-1
  * Status:  Complete to 1.1.
  */
 
+/**
+  * This interface has one method which is used for filtering filenames
+  * returned in a directory listing.  It is currently used by the 
+  * <code>File.list()</code> method and by the filename dialog in AWT.
+  * <p>
+  * The method in this interface determines if a particular file should
+  * or should not be included in the file listing.
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  * @author Tom Tromey <tromey@cygnus.com>
+  */
 public interface FilenameFilter
 {
-  public abstract boolean accept (File dir, String name);
-}
+
+/**
+  * This method determines whether or not a given file should be included
+  * in a directory listing.
+  *
+  * @param dir The <code>File</code> instance for the directory being read
+  * @param name The name of the file to test
+  *
+  * @return <code>true</code> if the file should be included in the list,
+  * <code>false</code> otherwise.
+  */
+boolean
+accept(File dir, String name);
+
+} // interface FilenameFilter
diff --git a/libjava/java/io/Serializable.java b/libjava/java/io/Serializable.java
index fab9188..ff6d08c 100644
--- a/libjava/java/io/Serializable.java
+++ b/libjava/java/io/Serializable.java
@@ -1,21 +1,43 @@
-/* Copyright (C) 1998, 1999  Free Software Foundation
+/* Serializable.java -- Interface to indicate a class may be serialized
+   Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.
 
-   This file is part of libgcj.
+This file is part of GNU Classpath.
+
+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. */
 
-This software is copyrighted work licensed under the terms of the
-Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
-details.  */
 
 package java.io;
 
-/**
- * @author Warren Levy <warrenl@cygnus.com>
- * @date August 18, 1998.  
- */
 /* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
  * Status:  Believed complete
  */
 
+/**
+  * This interface has no methods. It simply serves to indicate that
+  * the implementing class may be serialized.
+  *
+  * @author Aaron M. Renn (arenn@urbanophile.com)
+  * @author Warren Levy <warrenl@cygnus.com>
+  */
 public interface Serializable
 {
-}
+} // interface Serializable