Assuming this means that you want to increase the maximum line width, you want to go to Preferences (Window β Preferences), then find the Java menu β Code Style β Formatter. (Just type βformatterβ in the search box and you will find it quickly.)

Click Modify for the active profile, then go to the Line Layout tab. The first item should be "Maximum Line Width". Set the value for some suitable limit (e.g. 120) and reformat.

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