Method available

lib/java/io/FileInputStream.java:136–146

Returns the number of bytes that are available before this stream will block. This method always returns the size of the file minus the current position. @return the number of bytes available before blocking. @throws IOException if an error occurs in this stream.

()

     *             if an error occurs in this stream.
     */
    @Override
    public int available() throws IOException {
        openCheck();
        synchronized (repositioningLock) {
            // stdin requires special handling
            if (fd == FileDescriptor.in) {
                return (int) fileSystem.ttyAvailable();
            }
            return (int) fileSystem.available(fd.descriptor);
        }
    }

    /**
     * Closes this stream.