All Known Implementing Classes:

StandardEnvironment
```
public interface Environment
```
Interface providing access to the environment map and allowing the registration of listeners for certain signals.

See Also:

Signal

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`ENV_COLUMNS`	Key for the columns environment variable.
`static String`	`ENV_LINES`	Key for the lines environment variable.
`static String`	`ENV_TERM`	Key for the term environment variable.
`static String`	`ENV_USER`	Key for the user environment variable

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default void`	`addSignalListener(SignalListener listener)`	Add a global listener for all signals
`void`	`addSignalListener(SignalListener listener, Collection<Signal> signals)`	Add a qualified listener for the specific signals
`default void`	`addSignalListener(SignalListener listener, Signal... signals)`	Add a qualified listener for the specific signals
`Map<String,String>`	`getEnv()`	Retrieve the environment map
`Map<PtyMode,Integer>`	`getPtyModes()`	Retrieve the PTY modes settings
`void`	`removeSignalListener(SignalListener listener)`	Remove a previously registered listener for all the signals it was registered

- Field Detail
  - ENV_USER
```
static final String ENV_USER
```
    Key for the user environment variable
    
    See Also:
    
    Constant Field Values
  - ENV_LINES
```
static final String ENV_LINES
```
    Key for the lines environment variable. Specifies the number of lines visible on the client side. ENV_LINES and ENV_COLUMNS make up the console screen size.
    
    See Also:
    
    Constant Field Values
  - ENV_COLUMNS
```
static final String ENV_COLUMNS
```
    Key for the columns environment variable. Specifies the number of columns visible on the client side. ENV_LINES and ENV_COLUMNS make up the console screen size.
    
    See Also:
    
    Constant Field Values
  - ENV_TERM
```
static final String ENV_TERM
```
    Key for the term environment variable. Describes the terminal or terminal emulation which is in use.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getEnv
```
Map<String,String> getEnv()
```
    Retrieve the environment map
    
    Returns:
    
    the environment Map - never null
  - getPtyModes
```
Map<PtyMode,Integer> getPtyModes()
```
    Retrieve the PTY modes settings
    
    Returns:
    
    the Map of PtyModes - never null
  - addSignalListener
```
default void addSignalListener(SignalListener listener,
                               Signal... signals)
```
    Add a qualified listener for the specific signals
    
    Parameters:
    
    listener - the SignalListener to register
    
    signals - The (never null/empty) Signals the listener is interested in
  - addSignalListener
```
default void addSignalListener(SignalListener listener)
```
    Add a global listener for all signals
    
    Parameters:
    
    listener - the SignalListener to register
  - addSignalListener
```
void addSignalListener(SignalListener listener,
                       Collection<Signal> signals)
```
    Add a qualified listener for the specific signals
    
    Parameters:
    
    listener - the SignalListener to register
    
    signals - the Signals the listener is interested in
  - removeSignalListener
```
void removeSignalListener(SignalListener listener)
```
    Remove a previously registered listener for all the signals it was registered
    
    Parameters:
    
    listener - the SignalListener to remove

Interface Environment

Field Summary

Method Summary

Field Detail

ENV_USER

ENV_LINES

ENV_COLUMNS

ENV_TERM

Method Detail

getEnv

getPtyModes

addSignalListener

addSignalListener

addSignalListener

removeSignalListener