javac“无源文件"使用-h选项时 [英] javac "no source files" when using -h option

问题描述

我正在尝试使用JNI和JDK9.我有一个类NativeTest.java，看起来像这样:

I'm trying to experiment with using the JNI and JDK 9. I have a class NativeTest.java that looks like this:

public class NativeTest {

    static {
        System.loadLibrary("hello");
    }

    private native void sayHello();

    public static void main(String[] args) {
        new NativeTest().sayHello();
    }
}

我编译该类，然后使用javah NativeTest生成头文件.

I compile the class, then use javah NativeTest to generate the header file.

发布javah时，我收到此警告:

Upon issuing javah, I get this warning:

Warning: The javah tool is planned to be removed in the next major
JDK release. The tool has been superseded by the '-h' option added
to javac in JDK 8. Users are recommended to migrate to using the
javac '-h' option; see the javac man page for more information.

我知道下一个主要的JDK版本还需要很长时间，但是我认为我现在将开始习惯这个新选项.

I know it'll be quite a while before the next major JDK release, but I figured I'd start getting used to this new option now.

因此，尝试使用javac -h NativeTest.java(以及其他变体，例如NativeTest，NativeTest.class等)时，我总是收到此错误:

So upon trying javac -h NativeTest.java (and other variations like NativeTest, NativeTest.class, etc.) I keep getting this error:

javac: no source files

我无法在线找到任何帮助，可能是因为此功能是相对较新的，并且在手册页中找不到关于此新-h选项的任何信息.

I haven't been able to find any help online, probably because this feature is relatively new, and I can't find anything about this new -h option in the man page.

还有其他人尝试吗?我想念什么?

Anyone else try this yet? What am I missing?

推荐答案

我发现的解决方案是我没有指定javac放置头文件的目录.

The solution I discovered was that I was not specifying the directory where javac should place the header files.

执行javac -h . NativeTest.java成功.

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