- Java.io package classes
- Java.io - Home
- Java.io - BufferedInputStream
- Java.io - BufferedOutputStream
- Java.io - BufferedReader
- Java.io - BufferedWriter
- Java.io - ByteArrayInputStream
- Java.io - ByteArrayOutputStream
- Java.io - CharArrayReader
- Java.io - CharArrayWriter
- Java.io - Console
- Java.io - DataInputStream
- Java.io - DataOutputStream
- Java.io - File
- Java.io - FileDescriptor
- Java.io - FileInputStream
- Java.io - FileOutputStream
- Java.io - FilePermission
- Java.io - FileReader
- Java.io - FileWriter
- Java.io - FilterInputStream
- Java.io - FilterOutputStream
- Java.io - FilterReader
- Java.io - FilterWriter
- Java.io - InputStream
- Java.io - InputStreamReader
- Java.io - LineNumberInputStream
- Java.io - LineNumberReader
- Java.io - ObjectInputStream
- Java.io - ObjectInputStream.GetField
- Java.io - ObjectOutputStream
- io - ObjectOutputStream.PutField
- Java.io - ObjectStreamClass
- Java.io - ObjectStreamField
- Java.io - OutputStream
- Java.io - OutputStreamWriter
- Java.io - PipedInputStream
- Java.io - PipedOutputStream
- Java.io - PipedReader
- Java.io - PipedWriter
- Java.io - PrintStream
- Java.io - PrintWriter
- Java.io - PushbackInputStream
- Java.io - PushbackReader
- Java.io - RandomAccessFile
- Java.io - Reader
- Java.io - SequenceInputStream
- Java.io - SerializablePermission
- Java.io - StreamTokenizer
- Java.io - StringBufferInputStream
- Java.io - StringReader
- Java.io - StringWriter
- Java.io - Writer
- Java.io package extras
- Java.io - Interfaces
- Java.io - Exceptions
- Java.io package Useful Resources
- Java.io - Discussion
Java.io.Console.readPassword() Method
Description
The java.io.Console.readPassword(String fmt, Object... args) method provides a formatted prompt, then reads a password from the console with echoing disabled.
Declaration
Following is the declaration for java.io.Console.readPassword(String fmt, Object... args) method −
public char[] readPassword(String fmt, Object... args)
Parameters
fmt − A format string described in Format string syntax for the prompt text.
args − Arguments referenced by the format specifiers in the format string.
Return Value
This method returns a character array containing the password read from the console, not including the line termination character, or null if an end of stream has been reached.
Exception
IllegalFormatException − If a format string contains an illegal syntax, a format specifier that is incompatible with the given arguments, insufficient arguments given the format string, or other illegal conditions.
IOError − If an I/O error occurs.
Example
The following example shows the usage of java.io.Console.readPassword(String fmt, Object... args) method.
package com.tutorialspoint; import java.io.Console; public class ConsoleDemo { public static void main(String[] args) { Console cnsl = null; String alpha = null; String fmt = "%2$5s %3$10s%n"; try { // creates a console object cnsl = System.console(); // if console is not null if (cnsl != null) { // read line from the user input alpha = cnsl.readLine(fmt,"Your","Name: "); // prints System.out.println("Name is: " + alpha); // read password into the char array char[] pwd = cnsl.readPassword(fmt,"Enter","Password: "); // prints System.out.println("Password is: "+pwd); } } catch(Exception ex) { // if any error occurs ex.printStackTrace(); } } }
Let us compile and run the above program, this will produce the following result −
Your Name: Master Programmer Name is: Master Programmer Enter Password: Password is: Good Morning