Is it possible for Log4j to change the text color in the System.out console for individual levels? For example, by the principle of LogCat (info = blue, warning = yellow, error = red)?

  • System.err - reds =) - Gorets
  • what problem are you trying to solve? - jmu

2 answers 2

There are 2 ways:

  1. If the console is an ANSI compatible terminal then you can encode ESC sequences of message color - for example, see here
  2. If the console is not as such (as under Windows), then you can direct the output to ChainSaw and there it’s ugly to distort with colors.
    ... System.out.println(colorText("Any text", "BLUE")); ... private static String colorText(String text, String color) { int x = color.equals("RED") ? 31 : color.equals("GREEN") ? 32 : color.equals("YELLOW") ? 33 : color.equals("BLUE") ? 34 : color.equals("MAGENTA") ? 35 : color.equals("CYAN") ? 36 : color.equals("WHITE") ? 37 : color.equals("BLACK") ? 30 : color.equals("BRIGHT") ? 1 : 0; return (char) 27 + "[" + x + "m" + text + (char) 27 + "[0m"; }
    • First, you forgot to check the TERM environment variable before displaying ESC sequences. And this is what led to it: i.stack.imgur.com/d6qLh.png - Pavel Mayorov
    • Secondly, I don’t see any mention of log4j in your answer ... - Pavel Mayorov
    • I took the answer from here toster.ru/q/22091 - Mikhail Kolomiets
    • Does it somehow justify the provision of incorrect information? .. - Pavel Mayorov
    • Please try to write more detailed answers. I am sure the author of the question would be grateful for your expert commentary on the code above. - Nicolas Chabanovsky ♦