Question

我有以下数据结构：

dataModel.training = {ArrayList@4748}  size = 4
    0 = {HashMap@4784}  size = 6
      0 = {HashMap$HashMapEntry@4790} "controller" -> "Training01"
            key = {String@4796} "controller"
            value = {String@4797} "Training01"
      1 = {HashMap$HashMapEntry@4791} "description" -> "0101_0"
      2 = {HashMap$HashMapEntry@4792} "subset" -> "0,62"
      3 = {HashMap$HashMapEntry@4793} "table" -> "voctrain"
      4 = {HashMap$HashMapEntry@4794} "template" -> "resthai"
      5 = {HashMap$HashMapEntry@4795} "form" -> "Training01"
   1 = {HashMap@4785}  size = 9
   2 = {HashMap@4786}  size = 9
   3 = {HashMap@4787}  size = 7

如何在ArrayList的第一个条目（dataModel.training [0]）中获取键“controller”的值？

Answer 1

Map map =dataModel.training.get(0)// this return Hashmap at 0th Index
map.get("controller");// returns 'training'

如果你想在一个声明中这样做

dataModel.training.get(0).get("controller");

同样可以推广所有其他键和值

希望这有帮助！

祝你好运！

访问HashMap的ArrayList

1 个答案: