com.dalsemi.comm
Class NullOutputStream

java.lang.Object
  |
  +--java.io.OutputStream
        |
        +--com.dalsemi.comm.NullOutputStream

public class NullOutputStream

extends java.io.OutputStream

This class is used as an outlet when data is available for output but a port is not currently available. NullOutputStreams are used when the java.lang.System class initializes. System.out and System.err are initialized to this class so that system initialization routines do not have to open any devices.

This class is also useful in other instances. In Slush, if a telnet session runs a process in the background and the telnet session is closed, the background process now holds an invalid OutputStream. Slush changes the process' OutputStream to a NullOutputStream so the background process can continue to run.

See Also:

NullInputStream

Constructor Summary

NullOutputStream()

Method Summary

void	write(byte[] barr, int offset, int length) Writes the specified array to this NullOutputStream.
void	write(int b) Writes the specified byte to this NullOutputStream.

Methods inherited from class java.io.OutputStream

close, flush, write

Methods inherited from class java.lang.Object

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

Constructor Detail

NullOutputStream

public NullOutputStream()

Method Detail

write

public void write(int b)

Writes the specified byte to this NullOutputStream. The data is not actually written to any port or device.

Parameters:

b - data to be sent

Overrides:

write in class java.io.OutputStream

write

public void write(byte[] barr,
                  int offset,
                  int length)

Writes the specified array to this NullOutputStream. The data is not actually written to any port or device. This method is included so writes to this NullOutputStream will occur faster.

Parameters:

barr - the array containing data to be output

offset - offset into array where data starts

length - number of bytes to be sent

Overrides:

write in class java.io.OutputStream