public class ClearScreenExample {

    public static void main(String[] args) {

        clearScreen();

        System.out.println("This is a test message.");

    }

​

    public static void clearScreen() {

        try {

            if (System.getProperty("os.name").contains("Windows")) {

                new ProcessBuilder("cmd", "/c", "cls").inheritIO().start().waitFor();

            } else {

                System.out.print("\033[H\033[2J");

                System.out.flush();

            }

        } catch (Exception ex) {

            ex.printStackTrace();

        }

    }

}