Scala getClass.getResource() 返回 null

Question

I have this code:

val url: URL = getClass.getResource("com/mysite/main/test.fxml")

and it always returns null (or Unit ). I have only two files in the project:

MyProj/src/com/mysite/main/Test.scala
MyProj/src/com/mysite/main/test.fxml

and when I run the Test.scala the url value is always null.

I just tried rebuild the project, I am using IntelliJ IDEA. What am I doing wrong here?

Answer 1

You have three options:

• take advantage of relative path to your current package (where Test.class is):

   getClass.getResource("test.fxml")

• you can use absolute path:

   getClass.getResource("/com/mysite/main/test.fxml")

• or load through the ClassLoader (note that it always start from root):

   getClass.getClassLoader.getResource("com/mysite/main/test.fxml")

In IntelliJ IDEA, make sure you have added ;?*.fxml to the:

Settings ( Preferences on Mac) | Compiler | Resource Patterns .

Answer 2

Possibly it's not being copied to the bin/ directory from the src/ directory? This happens on recompilation, but if you drop it into the src/ directory after the program is already compiled, the IDE won't know.

Answer 3

Late answer but I just had this same problem. The root cause was an incorrect rootProject.name entry in my settings.gradle. Once I fixed that, cleaned, and rebuilt my resource were able to load using getClass().getResource(). Hopefully that helps somebody.

Answer 4

If it does not work, you can try with ClassLoader :

ClassLoader.getSystemResource("filename").getPath

The filename should be in the same directory layer