System.setOut(PrintStream out)

import java.io.FileOutputStream;
import java.io.PrintStream;
import java.io.FileNotFoundException;
 
public class NonStandardOut
{
    public static void main( String[] args )
    {
        String filename = "test.out";
        if( args.length > 0 )
            filename = args[0];
 
        try
        {
            PrintStream outStream = new PrintStream( new FileOutputStream(filename) );
            System.setOut(outStream);
            System.out.println("This is a test!");
            outStream.close();
        }
        catch( FileNotFoundException fnfe )
        {
            System.out.println("Sorry, can't use the file " + filename + "." );
        }
    }
}