ProcessBuilder Class

The ProcessBuilder class lets you create and start operating system processes.

See Creating a Process for examples on how to create and start a process. The ProcessBuilder class manages various process attributes, which the following table summarizes:

Table 6-1 ProcessBuilder Class Attributes and Related Methods

Process Attribute	Description	Related Methods
Command	Strings that specify the external program file to call and its arguments, if any.	ProcessBuilder constructor command​(String... command)
Environment	The environment variables (and their values). This is initially a copy of the system environment of the current process (see the System.getEnv() method).	environment​()
Working directory	By default, the current working directory of the current process.	directory() directory​(File directory)
Standard input source	By default, a process reads standard input from a pipe; access this through the output stream returned by the Process.getOutputStream method.	redirectInput​(ProcessBuilder.Redirect source)
Standard output and standard error destinations	By default, a process writes standard output and standard error to pipes; access these through the input streams returned by the Process.getInputStream and Process.getErrorStream methods. See Redirecting Output from a Process for an example.	redirectOutput(ProcessBuilder.Redirect destination) redirectError(ProcessBuilder.Redirect destination)
redirectErrorStream property	Specifies whether to send standard output and error output as two separate streams (with a value of false) or merge any error output with standard output (with a value of true).	redirectErrorStream​() redirectErrorStream​(boolean redirectErrorStream)