C#与Java的长度计算API的区别

C#:

public class demo01
    {
        public void test01()
        {
            //数组的长度是.Length
            int[] ary = new int[] { 1, 2, 3 };
            Console.WriteLine(ary.Length);

            //字符串的长度是.Length
            string str = "abc";
            Console.WriteLine(str.Length);

            //List的长度是.Count
            List<int> list = new List<int>();
            Console.WriteLine(list.Count);

            //Set的长度是.Count
            HashSet<string> set = new HashSet<string>();
            Console.WriteLine(set.Count);

            //Dictionary的长度是.Count
            Dictionary<string, int> dic = new Dictionary<string, int>();
            Console.WriteLine(dic.Count);
        }
    }

Java:

public class demo01 {
    public static void main(String[] args) {
        //数组的长度是.length
        int[] ary = new int[] {1,2,3};        
        System.out.println(ary.length);
        
        //字符串的长度是.length()
        String str = "abc";
        System.out.println(str.length());
        
        //List的长度是.size()
        List<Integer> list = new ArrayList<Integer>();
        System.out.println(list.size());
        
        //Set的长度是.size()
        Set<String> set = new HashSet<>();
        System.out.println(set.size());
        
        //Map的长度是.size()
        Map<String, Integer> map = new HashMap<String, Integer>();
        System.out.println(map.size());
    }
}