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diff --git a/libjava/classpath/java/nio/ByteBufferImpl.java b/libjava/classpath/java/nio/ByteBufferImpl.java
new file mode 100644
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+++ b/libjava/classpath/java/nio/ByteBufferImpl.java
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+/* ByteBufferImpl.java -- 
+   Copyright (C) 2002, 2003, 2004, 2005  Free Software Foundation, Inc.
+
+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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.nio;
+
+/**
+ * This is a Heap memory implementation
+ */
+final class ByteBufferImpl extends ByteBuffer
+{
+  private boolean readOnly;
+
+  ByteBufferImpl (byte[] buffer, int offset, int capacity, int limit, int position, int mark, boolean readOnly)
+  {
+    super (capacity, limit, position, mark);
+    this.backing_buffer = buffer;
+    this.array_offset = offset;
+    this.readOnly = readOnly;
+  }
+  
+  public CharBuffer asCharBuffer ()
+  {
+    return new CharViewBufferImpl (this, remaining() >> 1);
+  }
+
+  public ShortBuffer asShortBuffer ()
+  {
+    return new ShortViewBufferImpl (this, remaining() >> 1);
+  }
+
+  public IntBuffer asIntBuffer ()
+  {
+    return new IntViewBufferImpl (this, remaining() >> 2);
+  }
+
+  public LongBuffer asLongBuffer ()
+  {
+    return new LongViewBufferImpl (this, remaining() >> 3);
+  }
+
+  public FloatBuffer asFloatBuffer ()
+  {
+    return new FloatViewBufferImpl (this, remaining() >> 2);
+  }
+
+  public DoubleBuffer asDoubleBuffer ()
+  {
+    return new DoubleViewBufferImpl (this, remaining() >> 3);
+  }
+
+  public boolean isReadOnly ()
+  {
+    return readOnly;
+  }
+  
+  public ByteBuffer slice ()
+  {
+    return new ByteBufferImpl (backing_buffer, array_offset + position (), remaining (), remaining (), 0, -1, isReadOnly ());
+  }
+  
+  public ByteBuffer duplicate ()
+  {
+    return new ByteBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, isReadOnly ());
+  }
+  
+  public ByteBuffer asReadOnlyBuffer ()
+  {
+    return new ByteBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, true);
+  }
+  
+  void shiftDown (int dst_offset, int src_offset, int count)
+  {
+    System.arraycopy(backing_buffer, array_offset + src_offset,
+		     backing_buffer, array_offset + dst_offset,
+		     count);
+  }
+
+  public ByteBuffer compact ()
+  {
+    checkIfReadOnly();
+    mark = -1;
+    int pos = position();
+    if (pos > 0)
+      {
+	int count = remaining();
+	shiftDown(0, pos, count);
+	position(count);
+	limit(capacity());
+      }
+    else
+      {
+	position(limit());
+	limit(capacity());
+      }
+    return this;
+  }
+  
+  public boolean isDirect ()
+  {
+    return false;
+  }
+
+  /**
+   * Reads the <code>byte</code> at this buffer's current position,
+   * and then increments the position.
+   *
+   * @exception BufferUnderflowException If there are no remaining
+   * <code>bytes</code> in this buffer.
+   */
+  public byte get ()
+  {
+    if (pos >= limit)
+        throw new BufferUnderflowException();
+
+    return backing_buffer [(pos++) + array_offset];
+  }
+
+  /**
+   * Bulk get
+   */
+  public ByteBuffer get (byte[] dst, int offset, int length)
+  {
+    checkArraySize(dst.length, offset, length);
+    if ( (limit - pos) < length) // check for overflow
+      throw new BufferUnderflowException();
+
+    System.arraycopy(backing_buffer, pos + array_offset, 
+		     dst, offset, length);
+    pos += length;
+
+    return this;
+  }
+
+  /**
+   * Relative bulk put(), overloads the ByteBuffer impl.
+   */
+  public ByteBuffer put (byte[] src, int offset, int length)
+  {
+    if ( (limit - pos) < length) // check for overflow
+      throw new BufferOverflowException();
+    checkArraySize(src.length, offset, length);
+
+    System.arraycopy(src, offset, backing_buffer, pos + array_offset, length);
+    pos += length;
+
+    return this;
+  }
+
+  /**
+   * Relative put method. Writes <code>value</code> to the next position
+   * in the buffer.
+   *
+   * @exception BufferOverflowException If there is no remaining
+   * space in this buffer.
+   * @exception ReadOnlyBufferException If this buffer is read-only.
+   */
+  public ByteBuffer put (byte value)
+  {
+    if (readOnly)
+        throw new ReadOnlyBufferException();
+    if (pos >= limit)
+        throw new BufferOverflowException();
+
+    backing_buffer [(pos++) + array_offset] = value;
+    return this;
+  }
+  
+  /**
+   * Absolute get method. Reads the <code>byte</code> at position
+   * <code>index</code>.
+   *
+   * @exception IndexOutOfBoundsException If index is negative or not smaller
+   * than the buffer's limit.
+   */
+  public byte get (int index)
+  {
+    checkIndex(index);
+
+    return backing_buffer [index + array_offset];
+  }
+  
+  /**
+   * Absolute put method. Writes <code>value</code> to position
+   * <code>index</code> in the buffer.
+   *
+   * @exception IndexOutOfBoundsException If index is negative or not smaller
+   * than the buffer's limit.
+   * @exception ReadOnlyBufferException If this buffer is read-only.
+   */
+  public ByteBuffer put (int index, byte value)
+  {
+    checkIfReadOnly();
+    checkIndex(index);
+
+    backing_buffer [index + array_offset] = value;
+    return this;
+  }
+  
+  public char getChar ()
+  {
+    return ByteBufferHelper.getChar(this, order());
+  }
+  
+  public ByteBuffer putChar (char value)
+  {
+    if (readOnly)
+      throw new ReadOnlyBufferException ();
+    if ( (limit-pos) < 2)
+      throw new BufferOverflowException();
+
+    if (endian == ByteOrder.LITTLE_ENDIAN)
+      {
+        backing_buffer [(pos++) + array_offset] = (byte)(value&0xFF);
+        backing_buffer [(pos++) + array_offset] = (byte)(value>>8);
+      }
+    else
+      {
+        backing_buffer [(pos++) + array_offset] = (byte)(value>>8);
+        backing_buffer [(pos++) + array_offset] = (byte)(value&0xFF);
+      }
+    return this;
+  }
+  
+  public char getChar (int index)
+  {
+    return ByteBufferHelper.getChar(this, index, order());
+  }
+  
+  public ByteBuffer putChar (int index, char value)
+  {
+    ByteBufferHelper.putChar(this, index, value, order());
+    return this;
+  }
+
+  public short getShort ()
+  {
+    return ByteBufferHelper.getShort(this, order());
+  }
+  
+  public ByteBuffer putShort (short value)
+  {
+    ByteBufferHelper.putShort(this, value, order());
+    return this;
+  }
+  
+  public short getShort (int index)
+  {
+    return ByteBufferHelper.getShort(this, index, order());
+  }
+  
+  public ByteBuffer putShort (int index, short value)
+  {
+    ByteBufferHelper.putShort(this, index, value, order());
+    return this;
+  }
+
+  public int getInt ()
+  {
+    return ByteBufferHelper.getInt(this, order());
+  }
+  
+  public ByteBuffer putInt (int value)
+  {
+    ByteBufferHelper.putInt(this, value, order());
+    return this;
+  }
+  
+  public int getInt (int index)
+  {
+    return ByteBufferHelper.getInt(this, index, order());
+  }
+  
+  public ByteBuffer putInt (int index, int value)
+  {
+    ByteBufferHelper.putInt(this, index, value, order());
+    return this;
+  }
+
+  public long getLong ()
+  {
+    return ByteBufferHelper.getLong(this, order());
+  }
+  
+  public ByteBuffer putLong (long value)
+  {
+    ByteBufferHelper.putLong (this, value, order());
+    return this;
+  }
+  
+  public long getLong (int index)
+  {
+    return ByteBufferHelper.getLong (this, index, order());
+  }
+  
+  public ByteBuffer putLong (int index, long value)
+  {
+    ByteBufferHelper.putLong (this, index, value, order());
+    return this;
+  }
+
+  public float getFloat ()
+  {
+    return ByteBufferHelper.getFloat (this, order());
+  }
+  
+  public ByteBuffer putFloat (float value)
+  {
+    ByteBufferHelper.putFloat (this, value, order());
+    return this;
+  }
+  
+  public float getFloat (int index)
+  {
+    return ByteBufferHelper.getFloat (this, index, order());
+  }
+
+  public ByteBuffer putFloat (int index, float value)
+  {
+    ByteBufferHelper.putFloat (this, index, value, order());
+    return this;
+  }
+
+  public double getDouble ()
+  {
+    return ByteBufferHelper.getDouble (this, order());
+  }
+
+  public ByteBuffer putDouble (double value)
+  {
+    ByteBufferHelper.putDouble (this, value, order());
+    return this;
+  }
+  
+  public double getDouble (int index)
+  {
+    return ByteBufferHelper.getDouble (this, index, order());
+  }
+  
+  public ByteBuffer putDouble (int index, double value)
+  {
+    ByteBufferHelper.putDouble (this, index, value, order());
+    return this;
+  }
+}