Best way to maintain a config file for java application -

i'm writing java application contains lot of savable settings. config structure looks this:

 config |_ game 1    |_ game name: blah...    |_ player name: alice    |_ player name: bob    |_ other settings... |_ game 2    |_ game name: hah    |_ player name: alice    |_ player name: bob    |_ other settings... |_ game n.... 

you got idea. tried use xml working dom4j pain there lot of child nodes same name in different , same parent nodes , need change them lot. far hassle-less way discover use plain text file like

 [game 1] game name: blah player name: alice player name: bob ...  [game 2] ... 

but feel rudimentary. best or standard practice in industry maintaining config files in java?

edit : i'd solution portable, copy file 1 computer not break program. (sorry forget mention ahead.)

the best way store settings/preferences in java use preferences api.