ProcessBuilder類的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構建器環境的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()方法是一種非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• environment() method may throw an exception at the time of returning map interfaces.

  返回映射接口時， environment()方法可能會引發異常。

  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時調用線程無權訪問流程構建器環境，則可能引發此異常。

Syntax:

句法：

public Map environment();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of this method is Map, it returns this process builder environment.

該方法的返回類型為Map ，它返回此流程構建器環境。

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 objectProcessBuilder pr_bu = new ProcessBuilder();// By using environment() method is to retrieve the// environment of this pr_bu objectMap m = pr_bu.environment();// Display the environment variable valueSystem.out.println(m.get("PATH"));} }

Output

輸出量

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/isCOBOL2019R1/bin:/opt/cs/artifacts/Release/bin

翻譯自: https://www.includehelp.com/java/processbuilder-environment-method-with-example.aspx

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