Get single character in java console (terminal, blocking call)

Main.java

import java.io.Console;
import java.io.IOException;
import java.io.Reader;
import java.lang.Runtime;

public class Main {

    public static void main(String[] args) throws IOException, InterruptedException {
        System.out.println("Press the \"z\" key to exit!");
        String[] cmd = {"/bin/sh", "-c", "stty raw </dev/tty"};
        Runtime.getRuntime().exec(cmd).waitFor();
        Console console = System.console();
        Reader reader = console.reader();

        while (true) {
            int r = reader.read();
            System.out.printf("%s\r\n", r);
            if (r == 122) { // "z" character
                break;
            }
        }

        cmd = new String[] {"/bin/sh", "-c", "stty sane </dev/tty"};
        Runtime.getRuntime().exec(cmd).waitFor();
    }
}

Doesent work - throws Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.io.Console.reader()" because "console" is null