ProcessBuilder类的environment()方法 (ProcessBuilder Class environment() method)
environment() method is available in java.lang package.
environment()方法在java.lang包中可用。
environment() method is used to return Map interfaces of this process builder environment.
environment()方法用于返回此流程构建器环境的Map接口。
environment() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
environment()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。
environment() method may throw an exception at the time of returning map interfaces.
返回映射接口时， environment()方法可能会引发异常。
SecurityException: This exception may throw when the calling thread does not have the right to access the process builder environment when the security manager exists.
SecurityException ：如果存在安全管理器时调用线程无权访问流程构建器环境，则可能引发此异常。
Syntax:
句法：
public Map environment();
Parameter(s):
参数：
It does not accept any parameter.
它不接受任何参数。
Return value:
返回值：
The return type of this method is Map, it returns this process builder environment.
该方法的返回类型为Map ，它返回此流程构建器环境。
Example:
例：
// Java program to demonstrate the example
// of Map environment() method of ProcessBuilder
import java.io.*;
import java.util.*;
public class Environment {
public static void main(String[] args) throws Exception {
// Instantiating ProcessBuilder object
ProcessBuilder pr_bu = new ProcessBuilder();
// By using environment() method is to retrieve the
// environment of this pr_bu object
Map m = pr_bu.environment();
// Display the environment variable value
System.out.println(m.get("PATH"));
}
}
Output
输出量
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/isCOBOL2019R1/bin:/opt/cs/artifacts/Release/bin
翻译自: https://www.includehelp.com/java/processbuilder-environment-method-with-example.aspx
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