Java Length Property Length () method size () method

Length is a property that is generally used to describe the size of an array

Length () is a method that, for string literals , is used to find the length of a string of an element in an array

String str={"adfasf","sdufmd"}; System.  out . println (str.length);     Output array length 2System. out. Prinln (Str[1].length ());     

Size () is used to calculate the size of an object for a generic collection, and to see how many elements are in the generic type .

 Public Static voidMain (string[] args) {String []list={"Ma","Cao","Yuan"}; String a="Macaoyuan"; System. out. println (List.length); The array length is 3System. out. println (A.length ()); String length is 9List<Object> array=NewArrayList (); Array.add (a); System. out. println (Array.size ()); The number of objects in the generic is 1}

Java Length Property Length () method size () method