The difference between size,length,length () in Java

The difference between size,length,length () in Java One, size ()

The Length property in Java is said for an array, for example, you declare an array, and you want to know how long this array is.

Second, Length ()

The length () method in Java is for string literals, and if you want to see the length of the string, use Length ().

Third, length

The size () method in Java is said for a generic collection, and if you want to see how many elements the generic has, call this method to view it!

Iv. examples

public class TEST {    public static void main(String[] args) {        String[] strs={"北京","上海","田径"};        System.out.println(strs.length);        String str="XXX,您好！";        System.out.println(str.length());        List<Integer> inn=new ArrayList<Integer>();        inn.add(10);        inn.add(11);        System.out.println(inn.size());    }}

Output Result:

The difference between size,length,length () in Java