Class LineInputStream

protected InputStream in

The underlying input stream.

public LineInputStream(InputStream in)

Constructor using the US-ASCII character encoding.

Parameters:

in - the underlying input stream

public LineInputStream(InputStream in,
                       String encoding)

Constructor.

Parameters:

in - the underlying input stream

encoding - the character encoding to use

public int read()
            throws IOException

This method reads an unsigned byte from the input stream and returns it as an int in the range of 0-255. This method also will return -1 if the end of the stream has been reached.

This method will block until the byte can be read.

Overrides:

read in interface InputStream

Returns:

The byte read or -1 if end of stream

Throws:

IOException - If an error occurs

public int read(byte[] buf)
            throws IOException

This method reads bytes from a stream and stores them into a caller supplied buffer. This method attempts to completely fill the buffer, but can return before doing so. The actual number of bytes read is returned as an int. A -1 is returned to indicate the end of the stream.

This method will block until some data can be read.

This method operates by calling an overloaded read method like so: read(b, 0, b.length)

Overrides:

read in interface InputStream

Parameters:

Returns:

The number of bytes read or -1 if end of stream.

Throws:

IOException - If an error occurs.

public int read(byte[] buf,
                int off,
                int len)
            throws IOException

This method read bytes from a stream and stores them into a caller supplied buffer. It starts storing the data at index off into the buffer and attempts to read len bytes. This method can return before reading the number of bytes requested. The actual number of bytes read is returned as an int. A -1 is returned to indicate the end of the stream.

This method will block until some data can be read.

This method operates by calling the single byte read() method in a loop until the desired number of bytes are read. The read loop stops short if the end of the stream is encountered or if an IOException is encountered on any read operation except the first. If the first attempt to read a bytes fails, the IOException is allowed to propagate upward. And subsequent IOException is caught and treated identically to an end of stream condition. Subclasses can (and should if possible) override this method to provide a more efficient implementation.

Overrides:

read in interface InputStream

Parameters:

off - The offset into the array to start storing bytes

len - The requested number of bytes to read

Returns:

The actual number of bytes read, or -1 if end of stream.

Throws:

IOException - If an error occurs.

public String readLine()
            throws IOException

Read a line of input.