ProcessBuilder environment() in Java

environment(): This method is available in the java.lang.ProcessBuilder class of Java.

Syntax:

Map<String, String> java.lang.ProcessBuilder.environment()

This method returns a string map view of this process builder's environment.

Whenever a process builder is created, the environment is initialized to a copy of the current process environment.

Parameters: NA

Returns: this process builder's environment.

Throws:

1. SecurityException - if a security manager exists and its checkPermissionmethod doesn't allow access to the process environment.

Approach

Java

package com.ProcessBuilder;

public class ProcessBuilderenvironment {
    public static void main(String[] args) {

        ProcessBuilder processBuilder = 
                    new ProcessBuilder("notepad.exe");

        System.out.println(processBuilder.environment());
    }
}

Output:

{USERDOMAIN_ROAMINGPROFILE=DESKTOP-OK73JVQ, LOCALAPPDATA=C:\Users\Admin\AppData\Local, PROCESSOR_LEVEL=6, USERDOMAIN=DESKTOP-OK73JVQ, FPS_BROWSER_APP_PROFILE_STRING=Internet Explorer, LOGONSERVER=\\DESKTOP-OK73JVQ, JAVA_HOME=D:\tools\jdk-11.0.11_windows-x64_bin\jdk-11.0.11, SESSIONNAME=Console, ALLUSERSPROFILE=C:\ProgramData, LEADSINTERVAL=0 0/2 * * * ?, PROCESSOR_ARCHITECTURE=AMD64, PSModulePath=C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\WindowsPowerShell\v1.0\Modules, SystemDrive=C:, MAVEN_HOME=D:\tools\apache-maven-3.8.4, OneDrive=C:\Users\Admin\OneDrive, APPDATA=C:\Users\Admin\AppData\Roaming, USERNAME=Admin, ProgramFiles(x86)=C:\Program Files (x86), CommonProgramFiles=C:\Program Files\Common Files, Path=D:/Java/sts-4.9.0.RELEASE//plugins/org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_15.0.1.v20201027-0507/jre/bin/server;D:/Java/sts-4.9.0.RELEASE//plugins/org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_15.0.1.v20201027-0507/jre/bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Git\cmd;%MAVEN_HOME%\bin;D:\tools\apache-maven-3.8.4\bin;D:\tools\jdk-11.0.11_windows-x64_bin\jdk-11.0.11\bin;C:\Program Files\TortoiseSVN\bin;C:\kafka_2.12-3.2.3\bin\windows;C:\Users\Admin\AppData\Local\Programs\Python\Python39\Scripts\;C:\Users\Admin\AppData\Local\Programs\Python\Python39\;C:\Users\Admin\AppData\Local\Microsoft\WindowsApps;C:\Users\Admin\AppData\Local\Programs\Microsoft VS Code\bin;C:\Program Files\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;JAVA_HOME;C:\Users\Admin\Downloads\jdk-11.0.11_windows-x64_bin\jdk-11.0.11\bin;D:\tools\flutter\bin;;D:\Java\sts-4.9.0.RELEASE;, FPS_BROWSER_USER_PROFILE_STRING=Default, PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC, DriverData=C:\Windows\System32\Drivers\DriverData, OS=Windows_NT, OneDriveConsumer=C:\Users\Admin\OneDrive, COMPUTERNAME=DESKTOP-OK73JVQ, PROCESSOR_REVISION=3d04, CommonProgramW6432=C:\Program Files\Common Files, FB_ACCESS_KEY=EAAMJf6VHIegBAKJ562ygjdzRI3JGy8UOcQ4gJPRpEsJiZCNFfWDBJ9H5E9qZCP62GNypxbpmq3nEcVNiqVylxdmpkKBGN7glB2UkTaOSVwnKYVr6Mnnwj8BpF2w1hlo10qvqoXxONjo7ieF7PhmzLRsB5FQCeDXgt6NUE8hyLoSIG9UxsvKZBtVVZAxQM7heajqYXBw4fAZDZD, ComSpec=C:\WINDOWS\system32\cmd.exe, ProgramData=C:\ProgramData, ProgramW6432=C:\Program Files, REPORT_PATH=D:/report, HOMEPATH=\Users\Admin, SystemRoot=C:\WINDOWS, TEMP=C:\Users\Admin~1\AppData\Local\Temp, HOMEDRIVE=C:, PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 61 Stepping 4, GenuineIntel, USERPROFILE=C:\Users\Admin, TMP=C:\Users\JITEND~1\AppData\Local\Temp, CommonProgramFiles(x86)=C:\Program Files (x86)\Common Files, ProgramFiles=C:\Program Files, PUBLIC=C:\Users\Public, NUMBER_OF_PROCESSORS=4, windir=C:\WINDOWS, =::=::\}

Some methods of ProcessBuilder class

ProcessBuilder.ProcessBuilder(String...): This method constructs a process builder with the specified operating system program and arguments.

ProcessBuilder.ProcessBuilder(List<String>): This method constructs a process builder with the specified operating system program and arguments.

command(): This method returns this process builder's operating system program and arguments.

command(List<String>): This method sets this process builder's operating system program and arguments.

command(String...): This method sets this process builder's operating system program and arguments. 

directory(): This method returns this process builder's working directory.

directory(File): This method sets this process builder's working directory.

environment(): This method returns a string map view of this process builder's environment.

inheritIO(): This method sets the source and destination for subprocess standard I/O to be the same as those of the current Java process.

redirectError(): This method returns this process builder's standard error destination.

redirectError(File): This method sets this process builder's standard error destination to a file.

redirectError(Redirect): This method sets this process builder's standard error destination.

redirectErrorStream(): This method tells whether this process builder merges standard error and standard output.

redirectErrorStream(boolean): This method sets this process builder's redirectErrorStream property.

redirectInput(): This method returns this process builder's standard input source.

redirectInput(File): This method sets this process builder's standard input source to a file.

redirectInput(Redirect): This method sets this process builder's standard input source.

redirectOutput(): This method returns this process builder's standard output destination.

redirectOutput(File): This method sets this process builder's standard output destination to a file.

redirectOutput(Redirect): This method sets this process builder's standard output destination.

start(): This method starts a new process using the attributes of this process builder.

ProcessBuilder.startPipeline(List<ProcessBuilder>): his method starts a Process for each ProcessBuilder, creating a pipeline of processes linked by their standard output and standard input streams.