摘要:
list的添加元素import java.util.ArrayList ;import java.util.List ;import java.util.Collection ;public class ArrayListDemo01{public static void main(String args[]){List allList = null ;Collection allCollection = null ;allList = new ArrayList() ;// 指定操作的泛型为StringallCollection = new ArrayList() ;// 指定一个集合all 阅读全文