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Showing content from https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/lang/ProcessBuilder.Redirect.html below:

ProcessBuilder.Redirect (Java SE 21 & JDK 21)

Enclosing class:: ProcessBuilder

public abstract static class ProcessBuilder.Redirect extends Object

Since:: 1.7

Nested Class Summary
Nested Classes
Field Summary
Fields

Indicates that subprocess output will be discarded.

Indicates that subprocess I/O source or destination will be the same as those of the current process.

Indicates that subprocess I/O will be connected to the current Java process over a pipe.
Method Summary
Returns a redirect to append to the specified file.

boolean

Compares the specified object with this Redirect for equality.

Returns the
File
source or destination associated with this redirect, or
null
if there is no such file.

Returns a redirect to read from the specified file.

int

Returns a hash code value for this Redirect.

Returns a redirect to write to the specified file.

Returns the type of this Redirect.

Field Details
- PIPE
  Indicates that subprocess I/O will be connected to the current Java process over a pipe. This is the default handling of subprocess standard I/O.
  
  It will always be true that
```
 
 Redirect.PIPE.file() == null &&
 Redirect.PIPE.type() == Redirect.Type.PIPE
 
```
- INHERIT
  Indicates that subprocess I/O source or destination will be the same as those of the current process. This is the normal behavior of most operating system command interpreters (shells).
  
  It will always be true that
```
 
 Redirect.INHERIT.file() == null &&
 Redirect.INHERIT.type() == Redirect.Type.INHERIT
 
```
- DISCARD
  Indicates that subprocess output will be discarded. A typical implementation discards the output by writing to an operating system specific "null file".
  
  It will always be true that
```
 
 Redirect.DISCARD.file() is the filename appropriate for the operating system
 and may be null &&
 Redirect.DISCARD.type() == Redirect.Type.WRITE
 
```
  Since:
  
  9
Method Details
- type
  Returns the type of this Redirect.
  
  Returns:
  
  the type of this Redirect
- file
  Returns the
  File
  source or destination associated with this redirect, or
  null
  if there is no such file.
  
  Returns:
  
  the file associated with this redirect, or null if there is no such file
- from
  Returns a redirect to read from the specified file.
  
  It will always be true that
```
 
 Redirect.from(file).file() == file &&
 Redirect.from(file).type() == Redirect.Type.READ
 
```
  Parameters:
  
  file - The File for the Redirect.
  
  Returns:
  
  a redirect to read from the specified file
- to
  Returns a redirect to write to the specified file. If the specified file exists when the subprocess is started, its previous contents will be discarded.
  
  It will always be true that
```
 
 Redirect.to(file).file() == file &&
 Redirect.to(file).type() == Redirect.Type.WRITE
 
```
  Parameters:
  
  file - The File for the Redirect.
  
  Returns:
  
  a redirect to write to the specified file
- appendTo
  Returns a redirect to append to the specified file. Each write operation first advances the position to the end of the file and then writes the requested data. Whether the advancement of the position and the writing of the data are done in a single atomic operation is system-dependent and therefore unspecified.
  
  It will always be true that
```
 
 Redirect.appendTo(file).file() == file &&
 Redirect.appendTo(file).type() == Redirect.Type.APPEND
 
```
  Parameters:
  
  file - The File for the Redirect.
  
  Returns:
  
  a redirect to append to the specified file
- equals public boolean equals(Object obj)
  Compares the specified object with this Redirect for equality. Returns true if and only if the two objects are identical or both objects are Redirect instances of the same type associated with non-null equal File instances.
  Overrides:
  
  equals in class Object
  
  Parameters:
  
  obj - the reference object with which to compare.
  
  Returns:
  
  true if this object is the same as the obj argument; false otherwise.
  
  See Also:
  - Object.hashCode()
  - HashMap
- hashCode
  public int hashCode()
  
  Returns a hash code value for this Redirect.
  Overrides:
  
  hashCode in class Object
  
  Returns:
  
  a hash code value for this Redirect
  
  See Also:
  - Object.equals(java.lang.Object)
  - System.identityHashCode(java.lang.Object)

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