Is there any option for knowing characters in a line (Eclipse)

Lately I’ve been reading the Java Code Conventions, and I noticed that lines shouldn’t have more that 80 characters, and because I work in a 24 inch screen the code lines can be quite large and I still can read it easily, so the question is:

Does eclipse has any option to read code lines, like in the vertical way??

If not is there any option I could use?

Source: syntax

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