Java Module java.base Package javax.security.auth.callback Class PasswordCallback（JDK11）

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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.

Since:

1.4

See Also:

CallbackHandler, Serialized Form

Constructor Summary

Constructors
Constructor	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	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 declared in 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.

Java Module java.base Package javax.security.auth.callback Class PasswordCallback（JDK11）

Class PasswordCallback

Constructor Summary

Method Summary

Methods declared in class java.lang.Object

Constructor Detail

PasswordCallback

Method Detail

getPrompt

isEchoOn

setPassword

getPassword

clearPassword