Java by API/java.io/Console

Console: format(String fmt, Object... args)

   <source lang="java">

import java.io.Console; import java.io.IOException; import java.util.Arrays; public class Main {

 public static void main(String args[]) throws IOException {
   Console c = System.console();
   if (c == null) {
     System.err.println("No console.");
     System.exit(1);
   }
   String login = c.readLine("Enter your login: ");
   char[] oldPassword = c.readPassword("Enter your old password: ");
   if (verify(login, oldPassword)) {
     boolean noMatch;
     do {
       char[] newPassword1 = c.readPassword("Enter your new password: ");
       char[] newPassword2 = c.readPassword("Enter new password again: ");
       noMatch = !Arrays.equals(newPassword1, newPassword2);
       if (noMatch) {
         c.format("Passwords don"t match. Try again.%n");
       } else {
         change(login, newPassword1);
         c.format("Password for %s changed.%n", login);
       }
       Arrays.fill(newPassword1, " ");
       Arrays.fill(newPassword2, " ");
     } while (noMatch);
   }
   Arrays.fill(oldPassword, " ");
 }
 // Dummy verify method.
 static boolean verify(String login, char[] password) {
   return true;
 }
 // Dummy change method.
 static void change(String login, char[] password) {
 }

}

 </source>
   
  
 
  

Console: readLine(String fmt, Object... args)

   <source lang="java">

import java.io.Console; import java.io.IOException; import java.util.Arrays; public class Main {

 public static void main(String args[]) throws IOException {
   Console c = System.console();
   if (c == null) {
     System.err.println("No console.");
     System.exit(1);
   }
   String login = c.readLine("Enter your login: ");
   char[] oldPassword = c.readPassword("Enter your old password: ");
   if (verify(login, oldPassword)) {
     boolean noMatch;
     do {
       char[] newPassword1 = c.readPassword("Enter your new password: ");
       char[] newPassword2 = c.readPassword("Enter new password again: ");
       noMatch = !Arrays.equals(newPassword1, newPassword2);
       if (noMatch) {
         c.format("Passwords don"t match. Try again.%n");
       } else {
         change(login, newPassword1);
         c.format("Password for %s changed.%n", login);
       }
       Arrays.fill(newPassword1, " ");
       Arrays.fill(newPassword2, " ");
     } while (noMatch);
   }
   Arrays.fill(oldPassword, " ");
 }
 // Dummy verify method.
 static boolean verify(String login, char[] password) {
   return true;
 }
 // Dummy change method.
 static void change(String login, char[] password) {
 }

}

 </source>
   
  
 
  

Console: readPassword(String fmt, Object... args)

   <source lang="java">

import java.io.Console; import java.io.IOException; import java.util.Arrays; public class Main {

 public static void main(String args[]) throws IOException {
   Console c = System.console();
   if (c == null) {
     System.err.println("No console.");
     System.exit(1);
   }
   String login = c.readLine("Enter your login: ");
   char[] oldPassword = c.readPassword("Enter your old password: ");
   if (verify(login, oldPassword)) {
     boolean noMatch;
     do {
       char[] newPassword1 = c.readPassword("Enter your new password: ");
       char[] newPassword2 = c.readPassword("Enter new password again: ");
       noMatch = !Arrays.equals(newPassword1, newPassword2);
       if (noMatch) {
         c.format("Passwords don"t match. Try again.%n");
       } else {
         change(login, newPassword1);
         c.format("Password for %s changed.%n", login);
       }
       Arrays.fill(newPassword1, " ");
       Arrays.fill(newPassword2, " ");
     } while (noMatch);
   }
   Arrays.fill(oldPassword, " ");
 }
 // Dummy verify method.
 static boolean verify(String login, char[] password) {
   return true;
 }
 // Dummy change method.
 static void change(String login, char[] password) {
 }

}

 </source>