Need help developing multi-world support

Hello, i have a ctf plugin that works right now, but i want it to be able to cycle through worlds after each game has ended, with a vote. Ive already got the worlds working, there spawn area locations get stored in the config, and ive also got the voting down, after the game is over, it asks for you to vote. then the amount of votes for each map gets stored in a hashmap. But i cant figure out how to set all the spawns in the join command to the current arena, if that makes sense. If someone could give me some information on how to do this, that would be great. Also, i can post the code if you need it. Thanks

 

OneBillionAndOne
This is the main reason you use OOP instead of hashmaps to store everything

Oh yeah, and if your server has 0% uptime, not sure how many players can join