public FileOutputStream(String name) throws FileNotFoundException 
{
        this(name != null ? new File(name) : null, false);
}

Creates a file output stream to write to the file with the specified name. A new FileDescriptor object is created to represent this file connection.

First, if there is a security manager, its checkWrite method is called with name as its argument.

If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

Parameters:

name - the system-dependent filename

Throws:

FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

Also see:

java.lang.SecurityManager#checkWrite(java.lang.String)
exception: FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

exception: SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

 public FileOutputStream(File file) throws FileNotFoundException 
{
        this(file, false);
}

Creates a file output stream to write to the file represented by the specified File object. A new FileDescriptor object is created to represent this file connection.

First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument.

If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

Parameters:

file - the file to be opened for writing.

Throws:

FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

Also see:

java.io.File#getPath()
java.lang.SecurityException
java.lang.SecurityManager#checkWrite(java.lang.String)
exception: FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

exception: SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

 public FileOutputStream(FileDescriptor fdObj) 
{
        SecurityManager security = System.getSecurityManager();
        if (fdObj == null) {
            throw new NullPointerException();
        }
        if (security != null) {
            security.checkWrite(fdObj);
        }
        this.fd = fdObj;
        this.append = false;
        /*
         * FileDescriptor is being shared by streams.
         * Ensure that it's GC'ed only when all the streams/channels are done
         * using it.
         */
        fd.incrementAndGetUseCount();
}

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.

First, if there is a security manager, its checkWrite method is called with the file descriptor fdObj argument as its argument.

If fdObj is null then a NullPointerException is thrown.

This constructor does not throw an exception if fdObj is invalid . However, if the methods are invoked on the resulting stream to attempt I/O on the stream, an IOException is thrown.

Parameters:

fdObj - the file descriptor to be opened for writing

Throws:

SecurityException - if a security manager exists and its checkWrite method denies write access to the file descriptor

Also see:

java.lang.SecurityManager#checkWrite(java.io.FileDescriptor)
exception: SecurityException - if a security manager exists and its checkWrite method denies write access to the file descriptor

 public FileOutputStream(String name,
    boolean append) throws FileNotFoundException 
{
        this(name != null ? new File(name) : null, append);
}

Creates a file output stream to write to the file with the specified name. If the second argument is true, then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection.

First, if there is a security manager, its checkWrite method is called with name as its argument.

If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

Parameters:

name - the system-dependent file name

append - if true, then bytes will be written to the end of the file rather than the beginning

Throws:

FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason.

SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

Also see:

java.lang.SecurityManager#checkWrite(java.lang.String)
exception: FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason.

exception: SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

since: JDK1.1 -

 public FileOutputStream(File file,
    boolean append) throws FileNotFoundException 
{
        String name = (file != null ? file.getPath() : null);
        SecurityManager security = System.getSecurityManager();
        if (security != null) {
            security.checkWrite(name);
        }
        if (name == null) {
            throw new NullPointerException();
        }
        this.fd = new FileDescriptor();
        this.append = append;
        fd.incrementAndGetUseCount();
        open(name, append);
}

Creates a file output stream to write to the file represented by the specified File object. If the second argument is true, then bytes will be written to the end of the file rather than the beginning. A new FileDescriptor object is created to represent this file connection.

First, if there is a security manager, its checkWrite method is called with the path represented by the file argument as its argument.

If the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason then a FileNotFoundException is thrown.

Parameters:

file - the file to be opened for writing.

append - if true, then bytes will be written to the end of the file rather than the beginning

Throws:

FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

Also see:

java.io.File#getPath()
java.lang.SecurityException
java.lang.SecurityManager#checkWrite(java.lang.String)
exception: FileNotFoundException - if the file exists but is a directory rather than a regular file, does not exist but cannot be created, or cannot be opened for any other reason

exception: SecurityException - if a security manager exists and its checkWrite method denies write access to the file.

since: 1.4 -

 public  void close() throws IOException 
{
        synchronized (closeLock) {
            if (closed) {
                return;
            }
            closed = true;
        }
        if (channel != null) {
            /*
             * Decrement FD use count associated with the channel
             * The use count is incremented whenever a new channel
             * is obtained from this stream.
             */
            fd.decrementAndGetUseCount();
            channel.close();
        }
        /*
         * Decrement FD use count associated with this stream
         */
        int useCount = fd.decrementAndGetUseCount();
        /*
         * If FileDescriptor is still in use by another stream, the finalizer
         * will not close it.
         */
        if ((useCount < = 0) || !isRunningFinalize()) {
            close0();
        }
}

Closes this file output stream and releases any system resources associated with this stream. This file output stream may no longer be used for writing bytes.

If this stream has an associated channel then the channel is closed as well.

 protected  void finalize() throws IOException 
{
        if (fd != null) {
            if (fd == FileDescriptor.out || fd == FileDescriptor.err) {
                flush();
            } else {
                /*
                 * Finalizer should not release the FileDescriptor if another
                 * stream is still using it. If the user directly invokes
                 * close() then the FileDescriptor is also released.
                 */
                runningFinalize.set(Boolean.TRUE);
                try {
                    close();
                } finally {
                    runningFinalize.set(Boolean.FALSE);
                }
            }
        }
}

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.

 public FileChannel getChannel() 
{
        synchronized (this) {
            if (channel == null) {
                channel = FileChannelImpl.open(fd, false, true, append, this);
                /*
                 * Increment fd's use count. Invoking the channel's close()
                 * method will result in decrementing the use count set for
                 * the channel.
                 */
                fd.incrementAndGetUseCount();
            }
            return channel;
        }
}

Returns the unique FileChannel object associated with this file output stream.

The initial position of the returned channel will be equal to the number of bytes written to the file so far unless this stream is in append mode, in which case it will be equal to the size of the file. Writing bytes to this stream will increment the channel's position accordingly. Changing the channel's position, either explicitly or by writing, will change this stream's file position.

 public final FileDescriptor getFD() throws IOException 
{
        if (fd != null) return fd;
        throw new IOException();
}

Returns the file descriptor associated with this stream.

 public  void write(int b) throws IOException 
{
        write(b, append);
}

Writes the specified byte to this file output stream. Implements the write method of OutputStream.

 public  void write(byte[] b) throws IOException 
{
        writeBytes(b, 0, b.length, append);
}

Writes b.length bytes from the specified byte array to this file output stream.

 public  void write(byte[] b,
    int off,
    int len) throws IOException 
{
        writeBytes(b, off, len, append);
}

Writes len bytes from the specified byte array starting at offset off to this file output stream.