Messages (Tapestry API - 5.7.2)乐学网一站式学习平台

All Known Implementing Classes:

AbstractMessages, MapMessages, MessagesImpl
```
public interface Messages
```
Provides access to a messages catalog, a set of properties files that provide localized messages for a particular locale. The message catalog consists of keys and values and follows the semantics of a Java ResourceBundle with some changes.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`contains(String key)`	Returns true if the bundle contains the named key.
`String`	`format(String key, Object... args)`	Convenience for accessing a formatter and formatting a localized message with arguments.
`String`	`get(String key)`	Returns the localized message for the given key.
`MessageFormatter`	`getFormatter(String key)`	Returns a formatter for the message, which can be used to substitute arguments (as per `Formatter`).
`Set<String>`	`getKeys()`	Returns a set of all the keys for which this instance may provide a value.

- Method Detail
  - contains
```
boolean contains(String key)
```
    Returns true if the bundle contains the named key.
  - get
```
String get(String key)
```
    Returns the localized message for the given key. If catalog does not contain such a key, then a modified version of the key is returned (converted to upper case and enclosed in brackets).
    
    Parameters:
    
    key -
    
    Returns:
    
    localized message for key, or placeholder
  - getFormatter
```
MessageFormatter getFormatter(String key)
```
    Returns a formatter for the message, which can be used to substitute arguments (as per Formatter).
    
    Parameters:
    
    key -
    
    Returns:
    
    formattable object
  - format
```
String format(String key,
              Object... args)
```
    Convenience for accessing a formatter and formatting a localized message with arguments.
  - getKeys
```
Set<String> getKeys()
```
    Returns a set of all the keys for which this instance may provide a value.
    
    Returns:
    
    set of keys
    
    Since:
    
    5.4