How do I run a java class with a shebang line on Windows?

Question

我编写了一些 Java 实用程序，可与 Java 11 支持的 shebang 线一起使用。它们在我的 Mac 上运行良好，但我现在需要在 Windows 上使用它们，而 Windows 不支持 shebang 线，有没有办法做这个？

Answer 1

While Windows doesn't support the shebang line, the Java runtime will still run a java source file that conforms to the limitations for shebang-line java classes. (This basically means it must be contained in a single source file and not call any outside libraries. Standard Java libraries still work.)

Here's how I did it for a class I wrote called UuidGen.java :

First, I commented out the Shebang line, since it doesn't get used.

Second, I created a batch file called uuid.bat:

@echo off
java %~db0\UuidGen.java %*

Third, I put this file in the same directory as the UuidGen.java file.

Fourth, I put this directory on the system path.

Now, to run it, all I need to do is type uuid.

The %~db0 in the path gets replaced by the path to the .bat file being executed. The %* at the end passes all the parameters of the .bat command to the java command.