The class is the superclass of all classes representing an input stream of bytes. Applications that need to define a subclass of InputStream must always provide a method that returns the next byte of input.

Class declaration

Following is the declaration for class −

public abstract class InputStream
   extends Object
      implements Closeable

Class constructors

Sr.No. Constructor & Description


Single Constructor

Class methods

Sr.No. Method & Description
1 int available()

This method returns an estimate of the number of bytes that can be read (or skipped over) from this input stream without blocking by the next invocation of a method for this input stream.

2 void close()

This method closes this input stream and releases any system resources associated with the stream.

3 void mark(int readlimit)

This method marks the current position in this input stream.

4 boolean markSupported()

This method tests if this input stream supports the mark and reset methods.

5 abstract int read()

This method reads the next byte of data from the input stream.

6 int read(byte[] b)

This method reads some number of bytes from the input stream and stores them into the buffer array b.

7 int read(byte[] b, int off, int len) <

This method reads up to len bytes of data from the input stream into an array of bytes.

8 void reset()

This method repositions this stream to the position at the time the mark method was last called on this input stream.

9 long skip(long n)

This method skips over and discards n bytes of data from this input stream.

Methods inherited

This class inherits methods from the following classes −