PasswordCallback (Java Platform SE 8 )
Keywords: javax.security.auth.callback.PasswordCallback class
Date: 2017-07-29

compact1, compact2, compact3
javax.security.auth.callback

## Class PasswordCallback

- java.lang.Object
- - javax.security.auth.callback.PasswordCallback

- All Implemented Interfaces:
    Serializable, Callback

      public class PasswordCallback
      extends Object
      implements Callback, Serializable

  Underlying security services instantiate and pass a `PasswordCallback` to the `handle` method of a `CallbackHandler` to retrieve password information.

  See Also:
    `CallbackHandler`, Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `PasswordCallback(String prompt, boolean echoOn)` Construct a `PasswordCallback` with a prompt and a boolean specifying whether the password should be displayed as it is being typed.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `clearPassword()` Clear the retrieved password.
    `char[]` | `getPassword()` Get the retrieved password.
    `String` | `getPrompt()` Get the prompt.
    `boolean` | `isEchoOn()` Return whether the password should be displayed as it is being typed.
    `void` | `setPassword(char[] password)` Set the retrieved password.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### PasswordCallback

          public PasswordCallback(String prompt,
                                  boolean echoOn)

      Construct a `PasswordCallback` with a prompt and a boolean specifying whether the password should be displayed as it is being typed.

      Parameters:
        `prompt` - the prompt used to request the password.

        `echoOn` - true if the password should be displayed as it is being typed.
      Throws:
        `IllegalArgumentException` - if `prompt` is null or if `prompt` has a length of 0.

  - ### Method Detail

    - #### getPrompt

          public String getPrompt()

      Get the prompt.

      Returns:
        the prompt.

    - #### isEchoOn

          public boolean isEchoOn()

      Return whether the password should be displayed as it is being typed.

      Returns:
        the whether the password should be displayed as it is being typed.

    - #### setPassword

          public void setPassword(char[] password)

      Set the retrieved password.

      This method makes a copy of the input password before storing it.

      Parameters:
        `password` - the retrieved password, which may be null.
      See Also:
        `getPassword()`

    - #### getPassword

          public char[] getPassword()

      Get the retrieved password.

      This method returns a copy of the retrieved password.

      Returns:
        the retrieved password, which may be null.
      See Also:
        `setPassword(char[])`

    - #### clearPassword

          public void clearPassword()

      Clear the retrieved password.

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