com.dalsemi.comm
Class NullInputStream

java.lang.Object
  |
  +--java.io.InputStream
        |
        +--com.dalsemi.comm.NullInputStream

public class NullInputStream

extends InputStream

This class is used when data is requested for input but a port is not currently available. This class is used when the java.lang.System class initializes. System.in is initialized to a NullInputStream so that system initialization routines do not have to open any devices.

This class is also useful in other instances. In Slush, if a process is run in the background and the input streams are not redirected from a file or some other source, the background process should not be allowed to share the standard input stream System.in. In this case, the background process is created with a NullInputStream as its standard input.

This class duplicates the behavior of a closed stream.

See Also:

NullOutputStream

Constructor Summary

NullInputStream()

Method Summary

int	read() Reads a byte of data from this NullInputStream.

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, read, read, reset, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

NullInputStream

public NullInputStream()

Method Detail

read

public int read()

Reads a byte of data from this NullInputStream. The value -1 is returned, indicating the stream is closed and no more data will be available.

Overrides:

read in class InputStream

Returns:

-1, indicating this stream has no more input data