java中map有几种写法,一般怎样写,有什么区别吗?
Map<String,Object>map=newHashMap<String,Object>();Map<String,Object>ma=newHashMap<>()...
Map<String, Object> map = new HashMap<String, Object>();
Map<String, Object> ma = new HashMap<>();
HashMap<String, Object> m = new HashMap<>();
HashMap<String, Object> mm = new HashMap<String, Object>(); 展开
Map<String, Object> ma = new HashMap<>();
HashMap<String, Object> m = new HashMap<>();
HashMap<String, Object> mm = new HashMap<String, Object>(); 展开
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