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diff --git a/libjava/classpath/java/util/zip/CheckedOutputStream.java b/libjava/classpath/java/util/zip/CheckedOutputStream.java
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+/* CheckedOutputStream.java - Compute checksum of data being written.
+   Copyright (C) 1999, 2000 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.util.zip;
+
+import java.io.FilterOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+/* Written using on-line Java Platform 1.2 API Specification
+ * and JCL book.
+ * Believed complete and correct.
+ */
+
+/**
+ * OutputStream that computes a checksum of data being written using a
+ * supplied Checksum object.
+ *
+ * @see Checksum
+ *
+ * @author Tom Tromey
+ * @date May 17, 1999
+ */
+public class CheckedOutputStream extends FilterOutputStream
+{
+  /**
+   * Creates a new CheckInputStream on top of the supplied OutputStream
+   * using the supplied Checksum.
+   */
+  public CheckedOutputStream (OutputStream out, Checksum cksum)
+  {
+    super (out);
+    this.sum = cksum;
+  }
+
+  /**
+   * Returns the Checksum object used. To get the data checksum computed so
+   * far call <code>getChecksum.getValue()</code>.
+   */
+  public Checksum getChecksum ()
+  {
+    return sum;
+  }
+
+  /**
+   * Writes one byte to the OutputStream and updates the Checksum.
+   */
+  public void write (int bval) throws IOException
+  {
+    out.write(bval);
+    sum.update(bval);
+  }
+
+  /**
+   * Writes the byte array to the OutputStream and updates the Checksum.
+   */
+  public void write (byte[] buf, int off, int len) throws IOException
+  {
+    out.write(buf, off, len);
+    sum.update(buf, off, len);
+  }
+
+  /** The checksum object. */
+  private Checksum sum;
+}