Read file inputstream java

Company Questions. Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System. Computer Network. Compiler Design. Computer Organization. For reading streams of characters, consider using FileReader. Constructors of FileInputStream Class 1.

FileInputStream FileDescriptor fdobj : Creates an input file stream to read from the specified file descriptor. FileInputStream String name : Creates an input file stream to read from a file with the specified name. Skip to content. Change Language.

Related Articles. See Also: InputStream. If len is not zero, the method blocks until some input is available; otherwise, no bytes are read and 0 is returned. Throws: NullPointerException - If b is null.

The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. If n is negative, an IOException is thrown, even though the skip method of the InputStream superclass does nothing in this case.

The actual number of bytes skipped is returned. This method may skip more bytes than are remaining in the backing file. This produces no exception and the number of bytes skipped may include some number of bytes that were beyond the EOF of the backing file. Attempting to read from the stream after skipping past the end will result in -1 indicating the end of the file.

Overrides: skip in class InputStream Parameters: n - the number of bytes to be skipped. Returns: the actual number of bytes skipped. The next invocation might be the same thread or another thread. A single read or skip of this many bytes will not block, but may read or skip fewer bytes. In some cases, a non-blocking read or skip may appear to be blocked when it is merely slow, for example when reading large files over slow networks.

Overrides: available in class InputStream Returns: an estimate of the number of remaining bytes that can be read or skipped over from this input stream without blocking. If this stream has an associated channel then the channel is closed as well.

Returns: the file descriptor object associated with this stream. I write about modern JavaScript, Node. The newsletter is sent every week and includes early access to clear, concise, and easy-to-follow tutorials, and other stuff I think you'd enjoy! No spam ever, unsubscribe at any time. How to read a file using FileInputStream in Java.