All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

Direct Known Subclasses:

ByteArrayOutputStream, FileOutputStream, FilterOutputStream, ObjectOutputStream, OutputStream, PipedOutputStream
```
public abstract class OutputStream
extends Object
implements Closeable, Flushable
```
This abstract class is the superclass of all classes representing an output stream of bytes. An output stream accepts output bytes and sends them to some sink.
Applications that need to define a subclass of OutputStream must always provide at least a method that writes one byte of output.

Since:

JDK1.0

See Also:
BufferedOutputStream, ByteArrayOutputStream, DataOutputStream, FilterOutputStream, InputStream, write(int)

Constructor Summary
Constructors
Constructor and Description

OutputStream()

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Method Summary

Methods
Modifier and Type	Method and Description
`void`	`close()` Closes this output stream and releases any system resources associated with this stream.
`void`	`flush()` Flushes this output stream and forces any buffered output bytes to be written out.
`void`	`write(byte[] b)` Writes `b.length` bytes from the specified byte array to this output stream.
`void`	`write(byte[] b, int off, int len)` Writes `len` bytes from the specified byte array starting at offset `off` to this output stream.
`abstract void`	`write(int b)` Writes the specified byte to this output stream.

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Methods inherited from class java.lang.Object clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - OutputStream
    public OutputStream()
- Method Detail
  - write
    public abstract void write(int b) throws IOException
    
    Writes the specified byte to this output stream. The general contract for write is that one byte is written to the output stream. The byte to be written is the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.
    Subclasses of OutputStream must provide an implementation for this method.
    
    Parameters:
    b - the byte.
    
    Throws:
    
    IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.
  - write
    public void write(byte[] b) throws IOException
    
    Writes b.length bytes from the specified byte array to this output stream. The general contract for write(b) is that it should have exactly the same effect as the call write(b, 0, b.length).
    
    Parameters:
    b - the data.
    
    Throws:
    
    IOException - if an I/O error occurs.
    See Also:
    write(byte[], int, int)
  - write
    public void write(byte[] b, int off, int len) throws IOException
    
    Writes len bytes from the specified byte array starting at offset off to this output stream. The general contract for write(b, off, len) is that some of the bytes in the array b are written to the output stream in order; element b[off] is the first byte written and b[off+len-1] is the last byte written by this operation.
    The write method of OutputStream calls the write method of one argument on each of the bytes to be written out. Subclasses are encouraged to override this method and provide a more efficient implementation.
    If b is null, a NullPointerException is thrown.
    If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown.
    
    Parameters:
    b - the data.
    off - the start offset in the data.
    len - the number of bytes to write.
    
    Throws:
    
    IOException - if an I/O error occurs. In particular, an IOException is thrown if the output stream is closed.
  - flush
    public void flush() throws IOException
    
    Flushes this output stream and forces any buffered output bytes to be written out. The general contract of flush is that calling it is an indication that, if any bytes previously written have been buffered by the implementation of the output stream, such bytes should immediately be written to their intended destination.
    If the intended destination of this stream is an abstraction provided by the underlying operating system, for example a file, then flushing the stream guarantees only that bytes previously written to the stream are passed to the operating system for writing; it does not guarantee that they are actually written to a physical device such as a disk drive.
    The flush method of OutputStream does nothing.
    
    Specified by:
    
    flush in interface Flushable
    
    Throws:
    
    IOException - if an I/O error occurs.
  - close
    public void close() throws IOException
    
    Closes this output stream and releases any system resources associated with this stream. The general contract of close is that it closes the output stream. A closed stream cannot perform output operations and cannot be reopened.
    The close method of OutputStream does nothing.
    
    Specified by:
    
    close in interface Closeable
    
    Specified by:
    
    close in interface AutoCloseable
    
    Throws:
    
    IOException - if an I/O error occurs.

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Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-java/io/outputstream.html

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Referenzen

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Class OutputStream

Referenzen