Basically a replacement for /dev/null

BitBucketOutputStream.java

import java.io.*;
/**
 * A repository for unwanted bytes.
 * Basically a replacement for <code>/dev/null</code>
 */
public class BitBucketOutputStream extends OutputStream
{
    /**
     * Sets System.out to use the BitBucketOutputStream as the output
     * stream.  In effect, redirecting standard out to oblivion.
     * @see restoreSystemOut
     */
    public static void nullSystemOut()
    {
        System.setOut(new PrintStream(new BitBucketOutputStream(), true));
    }

    /**
     * Recreates a System.out similar to the default System.out, and restores
     * the default behavior.
     * @see #nullSystemOut
     */
    public static void restoreSystemOut()
    {
        FileOutputStream fdOut = new FileOutputStream(FileDescriptor.out);
        System.setOut(new PrintStream(new BufferedOutputStream(fdOut, 128), true));
    }
    /**
     * Sets System.err to use the BitBucketOutputStream as the output
     * stream.  In effect redirecting standard error to oblivion.
     * @see restoreSystemErr
     */
    public static void nullSystemErr()
    {
        System.setErr(new PrintStream(new BitBucketOutputStream(), true));
    }

    /**
     * Recreates a System.err similar to the default System.err, and restores
     * the default behavior.
     * @see #nullSystemErr
     */
    public static void restoreSystemErr()
    {
        FileOutputStream fdErr = new FileOutputStream(FileDescriptor.err);
        System.setErr(new PrintStream(new BufferedOutputStream(fdErr, 128), true));
    }

    /**
     * Does nothing with the specified byte.
     *
     * @param      b the <code>byte</code> to ignore.
     * @exception  IOException  if an I/O error occurs.
     */
    public void write(int b) throws IOException
    { }
}