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Java in a Nutshell

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The java.io Package

24.28 java.io.InputStream (JDK 1.0)

This abstract class is the superclass of all input streams. It defines the basic input methods that all input stream classes provide.

read() reads a single byte or an array or subarray of bytes. It returns the byte read, or 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 mark() and reset(). See also Reader.

public abstract class InputStream extends Object {
    // Default Constructor: public InputStream()
    // Public Instance Methods
            public int available() throws IOException;
            public void close() throws IOException;
            public synchronized void mark(int readlimit);
            public boolean markSupported();
            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 synchronized void reset() throws IOException;
            public long skip(long n) throws IOException;

Extended By:

ByteArrayInputStream, FileInputStream, FilterInputStream, ObjectInputStream, PipedInputStream, SequenceInputStream, StringBufferInputStream

Passed To:

BufferedInputStream(), CheckedInputStream(), DataInputStream(), FilterInputStream(), GZIPInputStream(), InflaterInputStream(), InputStreamReader(), LineNumberInputStream(), ObjectInputStream(), Properties.load(), PropertyResourceBundle(), PushbackInputStream(), Runtime.getLocalizedInputStream(), SequenceInputStream(), StreamTokenizer(), System.setIn(), URLConnection.guessContentTypeFromStream(), ZipInputStream()

Returned By:

Class.getResourceAsStream(), ClassLoader.getResourceAsStream(), ClassLoader.getSystemResourceAsStream(), Process.getErrorStream(), Process.getInputStream(), Runtime.getLocalizedInputStream(), Socket.getInputStream(), SocketImpl.getInputStream(), URL.openStream(), URLConnection.getInputStream(), ZipFile.getInputStream()

Type Of:

FilterInputStream.in, System.in

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