Android Studio shows wrong file contents

Question

I have an odd problem with Android Studio. Here is how my class file looks like on Android Studio

And here is what it looks like on a text editor.

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Answer 1

UPDATE: Quicker solution by the user Hong given below:

Delete the caches folder: C:\Users\my_user_name\.AndroidStudio3.3\system\caches

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Here's what worked for me.

1. Close Android Studio
2. Go to C:\Users*your username*
3. Locate the Android Studio settings directory named .AndroidStudioX.X (X.X being the version)
4. Rename it to something like old.AndroidStudioX.X
5. Start Android Studio, and when it asks if you want to import settings, choose the old directory

This should fix the issue.