[JAVA API] java.io.FileOutputStream

java.io

Class FileOutputStream

• java.lang.Object
• • java.io.OutputStream
  • • java.io.FileOutputStream

• All Implemented Interfaces:

  Closeable, Flushable, AutoCloseable

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  public class FileOutputStream
  extends OutputStream

  A file output stream is an output stream for writing data to a File or to a FileDescriptor. Whether or not a file is available or may be created depends upon the underlying platform. Some platforms, in particular, allow a file to be opened for writing by only one FileOutputStream (or other file-writing object) at a time. In such situations the constructors in this class will fail if the file involved is already open.

  FileOutputStream is meant for writing streams of raw bytes such as image data. For writing streams of characters, consider using FileWriter.

  Since:

  JDK1.0

  See Also:

  File, FileDescriptor, FileInputStream, Files.newOutputStream(java.nio.file.Path, java.nio.file.OpenOption...)

• • Constructor Summary

    Constructors 

    Constructor and Description
    FileOutputStream(File file) Creates a file output stream to write to the file represented by the specified File object.
    FileOutputStream(File file, boolean append) Creates a file output stream to write to the file represented by the specified File object.
    FileOutputStream(FileDescriptor fdObj) Creates a file output stream to write to the specified file descriptor, which represents an existing connection to an actual file in the file system.
    FileOutputStream(String name) Creates a file output stream to write to the file with the specified name.
    FileOutputStream(String name, boolean append) Creates a file output stream to write to the file with the specified name.

  • Method Summary

    Methods 

    Modifier and Type	Method and Description
    void	close() Closes this file output stream and releases any system resources associated with this stream.
    protected void	finalize() Cleans up the connection to the file, and ensures that the close method of this file output stream is called when there are no more references to this stream.
    FileChannel	getChannel() Returns the unique FileChannel object associated with this file output stream.
    FileDescriptor	getFD() Returns the file descriptor associated with this stream.
    void	write(byte[] b) Writes b.length bytes from the specified byte array to this file output stream.
    void	write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this file output stream.
    void	write(int b) Writes the specified byte to this file output stream.

    • Methods inherited from class java.io.OutputStream

      flush

    • Methods inherited from class java.lang.Object

      clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait