com.jn.langx.commandline.launcher

类 CommandLauncherImpl

java.lang.Object

com.jn.langx.commandline.launcher.CommandLauncherImpl

所有已实现的接口:

CommandLauncher

直接已知子类:

CommandLauncherProxy, Java13CommandLauncher

public abstract class CommandLauncherImpl
extends Object
implements CommandLauncher

A command launcher for a particular JVM/OS platform. This class is a general purpose command launcher which can only launch commands in the current working directory.

版本:

$Id: CommandLauncherImpl.java 1557338 2014-01-11 10:34:22Z sebb $

构造器概要

构造器

构造器和说明
CommandLauncherImpl()

方法概要

限定符和类型	方法和说明
Process	exec(CommandLine cmd, Map<String,String> env) Launches the given command in a new process.
abstract Process	exec(CommandLine cmd, Map<String,String> env, File workingDir) Launches the given command in a new process, in the given working directory.
boolean	isFailure(int exitValue) Checks whether exitValue signals a failure on the current system (OS specific).

从类继承的方法 java.lang.Object

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

构造器详细资料

CommandLauncherImpl

public CommandLauncherImpl()

方法详细资料

exec

public Process exec(CommandLine cmd,
                    Map<String,String> env)
             throws IOException

从接口复制的说明: CommandLauncher

Launches the given command in a new process.

指定者:

exec 在接口中 CommandLauncher

参数:

cmd - The command to execute

env - The environment for the new process. If null, the environment of the current process is used.

返回:

the newly created process

抛出:

IOException - if attempting to run a command in a specific directory

exec

public abstract Process exec(CommandLine cmd,
                             Map<String,String> env,
                             File workingDir)
                      throws IOException

从接口复制的说明: CommandLauncher

Launches the given command in a new process, in the given working directory.

指定者:

exec 在接口中 CommandLauncher

参数:

cmd - The command to execute

env - The environment for the new process. If null, the environment of the current process is used.

workingDir - The directory to start the command in. If null, the current directory is used

返回:

the newly created process

抛出:

IOException - if trying to change directory

isFailure

public boolean isFailure(int exitValue)

从接口复制的说明: CommandLauncher

Checks whether exitValue signals a failure on the current system (OS specific).

Note that this method relies on the conventions of the OS, it will return false results if the application you are running doesn't follow these conventions. One notable exception is the Java VM provided by HP for OpenVMS - it will return 0 if successful (like on any other platform), but this signals a failure on OpenVMS. So if you execute a new Java VM on OpenVMS, you cannot trust this method.

指定者:

isFailure 在接口中 CommandLauncher

参数:

exitValue - the exit value (return code) to be checked

返回:

true if exitValue signals a failure

另请参阅:

CommandLauncher.isFailure(int)