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Methods of InputStream

The InputStream class provides different methods that are implemented by its subclasses. Here are some of the commonly used methods:

  1. read() - reads one byte of data from the input stream.
  2. read(byte[] array) - reads bytes from the stream and stores in the specified array.
  3. available() - returns the number of bytes available in the input stream.
  4. mark() - marks the position in the input stream up to which data has been read.
  5. reset() - returns the control to the point in the stream where the mark was set.
  6. markSupported() - checks if the mark() and reset() method is supported in the stream.
  7. skips() - skips and discards the specified number of bytes from the input stream.
  8. close() - closes the input stream.

Here is how we can implement InputStream using the FileInputStream class. Suppose we have a file named input.txt with the following content.


\begin{lstlisting} This is a line of text inside the file. \end{lstlisting}

Let’s try to read this file using FileInputStream (a subclass of InputStream).


\begin{lstlisting} import java.io.FileInputStream; import java.io.InputStream; ... ...ose() ; } catch ( Exception e) { e.getStackTrace() ; } } } \end{lstlisting}

Output


\begin{lstlisting} Available bytes in the file : 35 Data read from the file : This is a line of text inside the file \end{lstlisting}