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Android Reference

FileDescriptor


java.io

Class FileDescriptor



  • public final class FileDescriptor
    extends Object
    Wraps a Unix file descriptor. It's possible to get the file descriptor used by some classes (such as FileInputStream, FileOutputStream, and RandomAccessFile), and then create new streams that point to the same file descriptor.
    • Constructor Summary

      Constructors
      Constructor and Description
      FileDescriptor()
      Constructs a new invalid FileDescriptor.
    • Method Summary

      Methods
      Modifier and Type Method and Description
      int getInt$()
      Returns the int fd.
      void setInt$(int fd)
      Sets the int fd.
      void sync()
      Ensures that data which is buffered within the underlying implementation is written out to the appropriate device before returning.
      String toString()
      Returns a string containing a concise, human-readable description of this object.
      boolean valid()
      Tests whether this FileDescriptor is valid.
    • Constructor Detail

      • FileDescriptor

        public FileDescriptor()
        Constructs a new invalid FileDescriptor.
    • Method Detail

      • sync

        public void sync()
                  throws SyncFailedException
        Ensures that data which is buffered within the underlying implementation is written out to the appropriate device before returning.
        Throws:
        SyncFailedException
      • valid

        public boolean valid()
        Tests whether this FileDescriptor is valid.
      • getInt$

        public final int getInt$()
        Returns the int fd. It's highly unlikely you should be calling this. Please discuss your needs with a libcore maintainer before using this method.
      • setInt$

        public final void setInt$(int fd)
        Sets the int fd. It's highly unlikely you should be calling this. Please discuss your needs with a libcore maintainer before using this method.
      • toString

        public String toString()
        Description copied from class: Object
        Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
           getClass().getName() + '@' + Integer.toHexString(hashCode())

        See Writing a useful toString method if you intend implementing your own toString method.

        Overrides:
        toString in class Object
        Returns:
        a printable representation of this object.


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