[rob74]

Go has a built-in tool for that (go fmt).

Coming back to BlueJ: I appreciate that beginners have to be taught to format their code properly sometime along the way, but not at the very beginning. If you have errors, warnings, linter hints, typos etc. all being highlighted, I imagine that must be confusing as hell for beginners. Better focus on fixing the syntax errors first (or learning how not to produce any in the first place). Also, over-eager linters such as ESLint can really suck all motivation out of you when writing code. As for automatic formatting, that's fine with languages where it's near-universal like Go, but for Java you should probably refrain from adding it to a tool such as BlueJ, otherwise you will get the opposite of what you wanted (people get used to the IDE doing it for them and then neglect proper formatting when the IDE doesn't).