Java tutorial
import java.io.Console; import java.util.Arrays; public class Main { public static void main(String[] args) { Console console = System.console(); if (console == null) { System.out.println("Console is not available"); System.exit(1); } char[] password = "java2s.com".toCharArray(); char[] passwordEntered = console.readPassword("Enter password: "); if (Arrays.equals(password, passwordEntered)) { System.out.println("\n Access granted \n"); Arrays.fill(password, ' '); Arrays.fill(passwordEntered, ' '); System.out.println("OK ..."); } else { System.out.println("Access denied"); System.exit(1); } } }