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This abstract class is the
superclass of all input streams. It defines the basic input methods
all input stream classes provide. read(
) reads
a single byte or an array (or subarray) of bytes.
It returns the bytes read, the number of bytes read, or -1 if the
end-of-file has been reached. skip( ) skips a
specified number of bytes of input. available( )
returns the number of bytes that can be read without blocking.
close( )
closes the input stream and frees up any system resources associated
with it. The stream should not be used after close(
) has been called.If
markSupported( ) returns TRue
for a given InputStream, that stream supports
mark( ) and reset( ) methods.
mark( ) marks the current position in the input
stream so that reset( ) can return to that
position (as long as no more than the specified number of bytes have
been read between the calls to mark( ) and
reset( )). See also Reader.
Figure 9-25. java.io.InputStream
public abstract class InputStream implements Closeable {
// Public Constructors
public InputStream ( );
// Public Instance Methods
public int available ( ) throws IOException; constant
public void close ( ) throws IOException; Implements:Closeable empty
public void mark (int readlimit ); synchronized empty
public boolean markSupported ( ); constant
public abstract int read ( ) throws IOException;
public int read (byte[ ] b ) throws IOException;
public int read (byte[ ] b , int off , int len ) throws IOException;
public void reset ( ) throws IOException; synchronized
public long skip (long n ) throws IOException;
// Methods Implementing Closeable
public void close ( ) throws IOException; empty
}Subclasses
ByteArrayInputStream,
FileInputStream,
FilterInputStream,
ObjectInputStream,
PipedInputStream,
SequenceInputStream,
StringBufferInputStream
Passed To
Too many methods to list.
Returned By
Too many methods to list.
Type Of
FilterInputStream.in, System.in
