How to read and display password from the console

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How to read and display password from the console
Posted on: April 10, 2010 at 12:00 AM

This tutorial demonstrate how to read and display password from the console.

Description:

Console class was introduced in jdk 1.6 This class help in taking the input from the console using its readPassword method . Here in this example this sample program it will ask to feed the password. Note when feeding the password it won't echo password but it accept and display later.

Code:


import java.io.*;



public class ReadDisplayPassword {



  public static void main(String[] args) {



    Console cons = System.console();

    if (cons == null) {

      System.out.println("Console Object is not available.");

      System.exit(0);

    } else {

      String format = "%1$4s %2$4s %3$8s%n";

      char[] pwd = cons.readPassword(format, "Enter", "user",

      "Password :");

      System.out.print("You have entered password : ");

      System.out.println(pwd);

    }

  }

}

Output:

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