java - 指定 line.separator 作为编译器设置？

Question

根据this answer的建议:

You can call

System.setProperty("line.separator", "\r\n");

in order to set the system property inside your code.

让 Java 程序输出所需的行结尾非常容易。但是，我认为没有理由不能更改该环境变量，例如作为编译器设置？

Answer 1

因为这根本不是怎么回事 environment variables根据定义，工作。环境变量由运行时环境决定，而不是由编译器或任何编译时设置决定。

Many operating systems use environment variables to pass configuration information to applications. Like properties in the Java platform, environment variables are key/value pairs, where both the key and the value are strings. The conventions for setting and using environment variables vary between operating systems, and also between command line interpreters.