Redirect standard error : IO redirection « File « Java Tutorial


public class Main {
  public static void main(String[] args) throws Exception {
    System.setErr(new PrintStream(new FileOutputStream("system_err.txt")));

    String nullString = null;
    nullString = nullString.toUpperCase();

11.70.IO redirection
11.70.1.Redirect standard error
11.70.2.Redirect standard output
11.70.3.Redirecting Standard Output, and Error
11.70.4.Replace standard output and error with a print stream, output to both the console and to a file.
11.70.5.Standard Err and Output Windows
11.70.6.Redirect standard output to a file
11.70.7.Demonstrates standard I/O redirection