Why is JFrame methods not showing in autocomplete in Eclipse JAVA [duplicate]

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issue in the picture method is working here

So when working with JFrame there are many methods, some show while other don't after the (.) for some reason but when physically typed out they do work. Very inconvenient for learning process. All autocomplete option in the setting are checked.

Images for reference. Sorry if the term "method" is not the correct one in this insistence.



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