Java Byte Stream FileInputStream/FileOutputStream

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• Java

FileInputStream

FileInputStream Constructors

Constructor	Description
FileInputStream(String filePath) throws FileNotFoundException	Creates an input stream for the file specified by filepath.
FileInputStream(File fileObj) throws FileNotFoundException	Creates an input stream for the file specified by fileObj.
FileInputStream(FileDescriptor fdObj) throws SecurityException	Creates a file system input stream that represents an existing connection through fdObj.

FileInputStream Methods

Method	Description
int available() throws IOException	Returns the number of bytes currently available to read.
int close() throws IOException	Closes the InputStream.
int read() throws IOException	Reads one byte from the InputStream and returns it as an int value.
int read(byte buf[]) throws IOException	Reads up to the size of buf[] from the InputStream, stores it in buf, and returns the number of bytes read.
int read(byte buf[], int offset, int numBytes) throws IOException	Reads numBytes from the InputStream, stores them starting at offset in buf[], and returns the number of bytes read.
int skip(long numBytes) throws IOException	Skips the bytes specified by numBytes and returns the number of skipped bytes.
protected void finalize()	Calls the close() method when there are no more references.
FileChannel getChannel()	Returns the unique FileChannel object of the FileInputStream.
FileDescriptor getFD()	Returns the FileDescriptor object for the actual file connection in the FileInputStream.

FileInputStream Example

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FileOutputStream

FileOutputStream Constructors

Constructor	Description
FileOutputStream(String filepath) throws FileNotFoundException	Creates an OutputStream for the file specified by filepath.
FileOutputStream(String filepath, boolean append) throws FileNotFoundException	Creates an OutputStream for the specified file. The append argument sets append mode when outputting.
FileOutputStream(File fileObj) throws FileNotFoundException	Creates an OutputStream for the file specified by fileObj.
FileOutputStream(File fileObj, boolean append) throws FileNotFoundException	Creates an OutputStream for the file specified by fileObj. The append argument sets append mode when outputting.
FileOutputStream(FileDescriptor fdObj) throws NullPointerException	Creates a file system OutputStream that represents an existing connection through fdObj.

FileOutputStream Methods

Method	Description
void close() throws IOException	Closes the OutputStream.
void flush() throws IOException	Outputs the remaining OutputStream data in the buffer.
void write(int i) throws IOException	Outputs the lower 8 bits of integer i.
void write(byte buf[]) throws IOException	Outputs the contents of buf.
void write(byte buf[], int index, int size) throws IOException	Outputs size bytes starting from index in buf.
FileChannel getChannel()	Returns the unique FileChannel object associated with the OutputStream.
FileDescriptor getFD()	Returns the FileDescriptor object associated with the OutputStream.

FileOutputStream Example

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