I want to create a new map every time the button is pressed. I want the names of the maps to be regular. I tried using ${} in the map name but it doesn't seem to work. is there any solution?

CodePudding user response：

There are a few ways to do this:

1. Use the sprintf function:

String mapName = sprintf("map_%d", mapNumber);

2. Use string interpolation:

String mapName = "map_${mapNumber}";

3. Use a template string:

String mapName = map_${mapNumber};

CodePudding user response：

You may think you want this, but you don't. Information and meta-information should remain separate. Very likely, a Map of Maps will accomplish everything you want with dynamic names.