java中Map和List初始化的两种方法

//初始化List
List<string> list = new ArrayList</string><string>();
list.add("string1");
list.add("string2");
//some other list.add() code......
list.add("stringN");
 
//初始化Map
Map<string object=""> map = new HashMap<string object="">();
map.put("key1", "value1");
map.put("key2", "value2");
//.... some other map.put() code
map.put("keyN", "valueN");

//初始化List
    List<string> list = new ArrayList<string>(){{
        add("string1");
        add("string2");
        //some other add() code......
        add("stringN");
    }};
 
    //初始化Map
    Map<string string=""> map = new HashMap<string object="">(){{
        put("key1", "value1");
        put("key2", "value2");
        //.... some other put() code
        put("keyN", "valueN");
    }};