My Eclipse's JS file editor's background isn't black

I installed Eclipse and Aptana 3 plugin. My HTML, CSS, XML file editor's background color 开发者_如何学JAVAis black. But only JS file editor's background color is white.

How can I change it to Aptana 3's style (black)?

Thanks.

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Is it possible it's opening it with a Web Tools JS editor or some other editor instead of the Aptana editor? Double-check by choosing right-click "Open With" on the file.

If so, you should be able to set Aptana as the default in Preferences > General > Editors > File Associations.