import java.io.Console;

public class PasswortLesen {

	static final int MIN_PASSWORD_LENGTH = 8;

	public static void main(String[] args) {
		char[] password;
		Console c = System.console();
		if (c != null) {
			do {
				password = c.readPassword(
						"Passwort eingeben (Minimum %d Zeichen) und\nanschliessend <return> druecken: ",
						MIN_PASSWORD_LENGTH);
				if(password.length < MIN_PASSWORD_LENGTH)
					System.out.println("Passwort  zu kurz, bitte wiederholen!");
			} while (password.length < MIN_PASSWORD_LENGTH);
			System.out.println(new String(password));
			password = null;
		}
	}
}