How to mask a password from console input? I'm using Java 6.
I've tried using console.readPassword()
, but it wouldn't work. A full example might help me actually.
Here's my code:
import java.io.BufferedReader;
import java.io.Console;
import java.io.IOException;
import java.io.InputStreamReader;
public class Test
{
public static void main(String[] args)
{
Console console = System.console();
console.printf("Please enter your username: ");
String username = console.readLine();
console.printf(username + "\n");
console.printf("Please enter your password: ");
char[] passwordChars = console.readPassword();
String passwordString = new String(passwordChars);
console.printf(passwordString + "\n");
}
}
I'm getting a NullPointerException...
A full example ?. Run this code : (NB: This example is best run in the console and not from within an IDE, since the System.console() method might return null in that case.)
import java.io.Console;
public class Main {
public void passwordExample() {
Console console = System.console();
if (console == null) {
System.out.println("Couldn't get Console instance");
System.exit(0);
}
console.printf("Testing password%n");
char[] passwordArray = console.readPassword("Enter your secret password: ");
console.printf("Password entered was: %s%n", new String(passwordArray));
}
public static void main(String[] args) {
new Main().passwordExample();
}
}