How to swap keys and values in a Map elegantly

Question

I already know how to do it the hard way and got it working - iterating over entries and swapping \"manually\". But i wonder if, like so many tasks, this one can be solved

Answer 1

There are some jobs that can be simplified to a certain point and no more. This may be one of them!

If you want to do the job using Java collections apis only then brute force is the way to go - it will be quick (unless the collection is huge) and it will be an obvious piece of code.