InputOutput (I/O APIs

```
public interface InputOutput
```
An I/O connection to one tab on the Output Window. To acquire an instance to write to, call, e.g., IOProvider.getDefault().getInputOutput("someName", false). To get actual streams to write to, call getOut() or getErr() on the returned instance.
Generally it is preferable not to hold a reference to an instance of InputOutput, but rather to fetch it by name from IOProvider as needed.
Note: For historical reasons, the mechanism to clear an output tab is via the method OutputWriter.reset(), though it would have made more sense implemented here.

See Also:

OutputWriter

Field Summary

Fields
Modifier and Type	Field and Description
`static InputOutput`	`NULL` Null InputOutput
`static Reader`	`nullReader` Deprecated. Use `NULL` instead.
`static OutputWriter`	`nullWriter` Deprecated. Use `NULL` instead.

Method Summary

All Methods Instance Methods Abstract Methods Deprecated Methods
Modifier and Type	Method and Description
`void`	`closeInputOutput()` Closes this tab.
`Reader`	`flushReader()` Deprecated. meaningless, does nothing
`OutputWriter`	`getErr()` Get an output writer to write to the tab in error mode.
`Reader`	`getIn()` Get a reader to read from the tab.
`OutputWriter`	`getOut()` Acquire an output writer to write to the tab.
`boolean`	`isClosed()` Test whether this tab has been closed, either by a call to `closeInputOutput()` or by the user closing the tab in the UI.
`boolean`	`isErrSeparated()` Test whether the error output is mixed into the regular output or not.
`boolean`	`isFocusTaken()` Test whether the output window takes focus when anything is written to it.
`void`	`select()` Ensure this pane is visible.
`void`	`setErrSeparated(boolean value)` Set whether the error output should be mixed into the regular output or not.
`void`	`setErrVisible(boolean value)` Show or hide the error pane, if separated.
`void`	`setFocusTaken(boolean value)` Set whether the output window should take focus when anything is written to it.
`void`	`setInputVisible(boolean value)` Show or hide the input line.
`void`	`setOutputVisible(boolean value)` Show or hide the standard output pane, if separated.

- Field Detail
  - NULL
```
static final InputOutput NULL
```
    Null InputOutput
  - nullReader
```
@Deprecated
static final Reader nullReader
```
    Deprecated. Use NULL instead.
  - nullWriter
```
@Deprecated
static final OutputWriter nullWriter
```
    Deprecated. Use NULL instead.
- Method Detail
  - getOut
```
OutputWriter getOut()
```
    Acquire an output writer to write to the tab. This is the usual use of a tab--it writes to the main output pane.
    
    Returns:
    
    the writer
  - getIn
```
Reader getIn()
```
    Get a reader to read from the tab. If a reader is ever requested, an input line is added to the tab and used to read one line at a time.
    
    Returns:
    
    the reader
  - getErr
```
OutputWriter getErr()
```
    Get an output writer to write to the tab in error mode. This might show up in a different color than the regular output, e.g., or appear in a separate pane.
    
    Returns:
    
    the writer
  - closeInputOutput
```
void closeInputOutput()
```
    Closes this tab. The effect of calling any method on an instance of InputOutput after calling closeInputOutput() on it is undefined.
  - isClosed
```
boolean isClosed()
```
    Test whether this tab has been closed, either by a call to closeInputOutput() or by the user closing the tab in the UI.
    
    Returns:
    
    true if it is closed
    
    See Also:
    
    closeInputOutput()
  - setOutputVisible
```
void setOutputVisible(boolean value)
```
    Show or hide the standard output pane, if separated. Does nothing in either of the available implementations of this API.
    
    Parameters:
    
    value - true to show, false to hide
  - setErrVisible
```
void setErrVisible(boolean value)
```
    Show or hide the error pane, if separated. Does nothing in either of the available implementations of this API.
    
    Parameters:
    
    value - true to show, false to hide
  - setInputVisible
```
void setInputVisible(boolean value)
```
    Show or hide the input line.
    
    Parameters:
    
    value - true to show, false to hide
  - select
```
void select()
```
    Ensure this pane is visible.
  - isErrSeparated
```
boolean isErrSeparated()
```
    Test whether the error output is mixed into the regular output or not. Always true for both available implementations of this API.
    
    Returns:
    
    true if separate, false if mixed in
  - setErrSeparated
```
void setErrSeparated(boolean value)
```
    Set whether the error output should be mixed into the regular output or not. Note that this method is optional and is not supported by either of the current implementations of InputOutput (core/output and core/output2).
    
    Parameters:
    
    value - true to separate, false to mix in
  - isFocusTaken
```
boolean isFocusTaken()
```
    Test whether the output window takes focus when anything is written to it.
    
    Returns:
    
    true if any write to the tab should cause it to gain keyboard focus (not recommended)
  - setFocusTaken
```
void setFocusTaken(boolean value)
```
    Set whether the output window should take focus when anything is written to it. Note that this really means the output window will steal keyboard focus whenever a line of output is written. This is generally an extremely bad idea and strongly recommended against by most UI guidelines.
    
    Parameters:
    
    value - true to take focus
  - flushReader
```
@Deprecated
Reader flushReader()
```
    Deprecated. meaningless, does nothing
    
    Flush pending data in the input-line's reader. Called when the reader is about to be reused.
    
    Returns:
    
    the flushed reader

Interface InputOutput

Field Summary

Method Summary

Field Detail

NULL

nullReader

nullWriter

Method Detail

getOut

getIn

getErr

closeInputOutput

isClosed

setOutputVisible

setErrVisible

setInputVisible

select

isErrSeparated

setErrSeparated

isFocusTaken

setFocusTaken

flushReader