commands in java to clear the screen

Question

What command in Java will let you clear the console in a command-line application?

Answer 1

Run this sample program: it demonstrates how to clear the console using an escape sequence and reposition the cursor to position X=1, Y=1.

I tested it on several Linux terminals. Don't know, if it works under Windows.
Perhaps you can tell me ;)

Read this article about escape sequences.

import java.io.*;

public class Main {

public static final char ESC = 27;

public static void main(String[] args)
        throws Exception {
    Console c = System.console();
    if (c == null) {
        System.err.println("no console");
        System.exit(1);
    }

    // clear screen only the first time
    c.writer().print(ESC + "[2J");
    c.flush();
    Thread.sleep(200);

    for (int i = 0; i < 100; ++i) {
        // reposition the cursor to 1|1
        c.writer().print(ESC + "[1;1H");
        c.flush();

        c.writer().println("hello " + i);
        c.flush();

        Thread.sleep(200);
    }
}

}