you need to write a wrapper. something like this.
yes i know this code is a piece of crap, and a lot of it is redundant(i  
spent some time getting it to work), but it works.

package com.Errors;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.PrintStream;

import java.util.*;
import java.util.regex.*;

//this should only be used with the log4j package
//it is to trap any errors that might be directed to the console screen.
public class consoleIntercept extends PrintStream {
   private PrintStream console = System.out;
   private PrintStream err = System.err;

   public consoleIntercept() {
       super(System.out, true); // Autoflush
       System.setOut(this);
       System.setErr(this);

     

   }

//error_stuff  is the package  that  log4j's  the sh.t sent to it.

   // public PrintStream getConsole() { return console; }
   public void dispose() {
       System.setOut(console);
       System.setErr(err);

   
   }

   // Override all possible print/println methods to send
   public void print(String x) {
       console.print(x); // keep it to the console as well
       Error_stuff.handleError(x);
   }

   public void println(String x) {
       console.println(x); // keep it to the console as well
       Error_stuff.handleError(x);
   }
 public void print(Object x) {
   Error_stuff.handleError(x.toString());

 }
 public void println(Object x) {

   Error_stuff.handleError(x.toString());
 }
  /*
   public void print(boolean x) {
     console.print(x);

   }
   public void println(boolean x) {
     console.println(x);
   }
   public void print(char x) {
     console.print(x);

   }
   public void println(char x) {

     console.println(x);
     fout.println(x);
   }
   public void print(int x) {
     console.print(x);

   }
   public void println(int x) {

     console.println(x);
     fout.println(x);
   }
   public void print(long x) {
     console.print(x);

   }
   public void println(long x) {

     console.println(x);
     fout.println(x);
   }
   public void print(float x) {
     console.print(x);

   }
   public void println(float x) {

     console.println(x);
     fout.println(x);
   }
   public void print(double x) {
     console.print(x);

   }
   public void println(double x) {

     console.println(x);
     fout.println(x);
   }
   public void print(char[] x) {
     console.print(x);

   }
   public void println(char[] x) {

     console.println(x);
     fout.println(x);
   }

 
   public void println() {
     if(false) console.print("println");

     console.println();
     fout.println();
   }
 public void write(int x) {
 Error_stuff.handleError(x.toString());
 }

    public void
     write(byte[] buffer, int offset, int length) {
       console.write(buffer, offset, length);
     
     }
     public void write(int b) {
       console.write(b);
       fout.write(b);
}
*/
}