怎么做的Hashmap我有一个像如何使用散列表存储值的列表?使用以下格式
{"tname":"Learning Ratio and Proportion Concepts and practice assessment","gname":"Sixth grade"},
{"tname":"Number System","gname":"Sixth grade"},
{"tname":"quations and expression","gname":"Seventh grade"},{"tname":"Geometry","gname":"Seventh grade"}
我希望保存为
list<String>={"Sixth grade","Seventh grade"}
list(list<String>)={{"Learning Ratio and Proportion Concepts and practice assessment","Number System"},{"quations and expression","Geometry"}}
任何一个可以帮助我感谢的价值列表...
键值只能在地图中出现*一次*。你不止一次使用过tname和gname。你想要3张地图还是1张地图? –
只有一张地图... – sureshkumar
然后tname和gname只能在地图中出现一次。 –