how to read or get hidden input

[Shravee]

Hi,

im using the foll code to read input for password.

BufferedReader read = new BufferedReader(new InputStreamReader(System.in));
System.out.println("enter your passw\n");
read.readLine();

although this works, the password is visible upfront. so when the user types he should see the chars typed in hidden or asterick or dotted format such that the passw is not visible.

can someone help on the same

rgds
Shravee

[Tolls]

Nope.
Not without using something like an ncurses api.

[JosAH]

There's a Console class that can do it.

kind regards,

Jos

[Tolls]

Crikey.
I sit corrected!
:)

[JosAH]

We're not angry, only sad ...

kind regards,

Jos ;-)

[Shravee]

There's a Console class that can do it.

kind regards,

Jos

can you help me with this.

i tried the foll code but im not able to get inside the if loop.

Console console = System.console();
if (console != null) {

// Read username from the console
String username = console.readLine("Username: ");

// Read password
char[] password = console.readPassword("Password: ");

}

[JosAH]

Did you try to run this from a command line shell/interpreter? Als read the API documentation for the Console class again (it also mentions the availability of a Console).

kind regards,

Jos

ps. the 'if' statement is not a loop.

[Shravee]

hi Josh, thanks it worked from cmd prompt.

but why not from eclipse. what should i do to work from eclipse.

--shravee

[JosAH]

hi Josh, thanks it worked from cmd prompt.

but why not from eclipse. what should i do to work from eclipse.

Eclipse 'fakes' a console; look at the top line of Eclipse's console: it shows that it's running 'javaw', i.e. a console-less JVM. Eclipse uses the setIn( ... ), setOut( ... ) and setErr( ... ) methods from the System class to hook up its console to the system streams, but there is no OS console anywhere so the System class can't return one.

kind regards,

Jos