package ArrayListDemo;
import ;
public class ArrayListDemo1 {
public static void main(String[] args) {
//1. Create a collection object
// Generics: Specify the type of data stored in the collection
/*
* boolean add(E e)
* boolean remove(E e)
* E remove(int index, E e)
* E set(int index , E e) Modify
* E get(int index) query
* int size Get length
*
* */
ArrayList<String> list = new ArrayList<String>();
//Add elements
("123");
("csac");
//Delete the element
// boolean remove = ("123");
// (remove);
//Index deletion will delete elements that have been deleted on the index
// String remove = (0);
// (remove);
//Modify elements
// String set = (1, "aaa");
// (set);
//Query a single element
// String s = (0);
// (s);
for (int i = 0; i < (); i++) {
String s = (i);
(s);
}
// (list);
}
}