java.lang
Class Process

java.lang.Object
  |
  +--java.lang.Process

public abstract class Process

extends Object

An instance of class Process is returned by variants of the exec () method in class System. From the Process instance, it is possible to: get the standin and/or standout of the subprocess, kill the subprocess, wait for it to terminate, and to retrieve the final exit value of the process.

Dropping the last reference to a Process instance does not kill the subprocess. There is no requirement that the subprocess execute asynchronously with the existing Java process.

Constructor Summary

Process()

Method Summary

abstract void	destroy() Kills the subprocess.
abstract int	exitValue() Returns the exit value for the subprocess.
abstract InputStream	getErrorStream() Returns the an InputStream connected to the error stream of the child process.
abstract InputStream	getInputStream() Returns a Stream connected to the output of the child process.
abstract OutputStream	getOutputStream() Returns a Stream connected to the input of the child process.
abstract int	waitFor() Waits for the subprocess to complete.

Methods inherited from class java.lang.Object

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

Constructor Detail

Process

public Process()

Method Detail

getOutputStream

public abstract OutputStream getOutputStream()

Returns a Stream connected to the input of the child process. This stream is traditionally buffered.

getInputStream

public abstract InputStream getInputStream()

Returns a Stream connected to the output of the child process. This stream is traditionally buffered.

getErrorStream

public abstract InputStream getErrorStream()

Returns the an InputStream connected to the error stream of the child process. This stream is traditionally unbuffered.

waitFor

public abstract int waitFor()
                     throws InterruptedException

Waits for the subprocess to complete. If the subprocess has already terminated, the exit value is simply returned. If the subprocess has not yet terminated the calling thread will be blocked until the subprocess exits.

Throws:

InterruptedException - Another thread has interrupted this thread.

exitValue

public abstract int exitValue()

Returns the exit value for the subprocess.

Throws:

IllegalThreadStateException - If the subprocess has not yet terminated.

destroy

public abstract void destroy()

Kills the subprocess.