The following editor will bring you an article to quickly create List and Map instances with initial values in java. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor and take a look.
The way to initialize a List and Map object and add values is as follows:
List<String> sList = new ArrayList<String>(); sList.add("str1"); sList.add("str2");
Map<String,String> sMap = new HashMap<String, String>(); sMap.put("k1", "v1"); sMap.put("k2", "v2");
This operation can also be implemented with the following code, which can make the code look like Neater:
List<String> sList = Arrays.asList("str1", "str2");//这种方法生成的list,是不支持添加或删除元素的
private Map<Integer, String> newsEventMap = new HashMap<Integer, String>(){{ put("k1","v1"); put("k2","v2"); }};
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