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第一种方法(常用方法):
//初始化List
List list = new ArrayList();
list.add("string1");
list.add("string2");
//some other list.add() code......
list.add("stringN");
//初始化Map
Map map = new HashMap();
map.put("key1", "value1");
map.put("key2", "value2");
//.... some other map.put() code
map.put("keyN", "valueN");
第二种方法(双括号初始化法)
//初始化List
List list = new ArrayList(){{
add("string1");
add("string2");
//some other add() code......
add("stringN");
}};
//初始化Map
Map map = new HashMap(){{
put("key1", "value1");
put("key2", "value2");
//.... some other put() code
put("keyN", "valueN");
}};
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