Trying to avoid the batch file route

The code is pretty self explanatory-the commented out portion does not
work I'm guessing due to the ">" which the java runtime does not
recognize?

How do I write the output to a text file without having to use a batch
file? Things would be nice if exec() returned the output, but the
process which is returned does not do so to my knowledge. So, I try
what typically is done on command prompt.

Thanks in advance.

    private String createMapFile(String binDirectory, String binName) {
// String mapCommand = "nm -t d " + binDirectory + "/" + binName + "


// Process proc;
// try {
// proc = Runtime.getRuntime().exec(mapCommand);
// proc.waitFor();
// System.out.println("Exit value = " + proc.exitValue());
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// } catch (InterruptedException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
//
        //use batch file to write into mapFile.txt:

        File f = new File(binDirectory + "temp.bat");

        PrintWriter p;
        try {
            p = new PrintWriter(f);
            p.println();
            p.close();
            Process proc = Runtime.getRuntime().exec(binDirectory +
"temp.bat");
            proc.waitFor();
            System.out.println("Exit value = " + proc.exitValue());
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        f.delete();

        return binDirectory.concat("/mapFile.txt");
    }