If I'm reading the question correctly then I believe that you need to: 1.) create a destination Map instance to put the results in 2.) iterate through the keySet() of the source map-of-maps a.) get the value (a map) from the source map-of-maps b.) putAll() of the value to the destination map
Joined: Apr 08, 2002
Thank you all very very much! I got it working now! I was amazed, that the solution was so simple. My approach was a little bit more complex...