A.ArrayList是线程安全的,Vector是线程不安全
B.ArrayList是线程不安全的,Vector是线程安全的
C.ArrayList底层是数组结构,Vector底层是链表结构
D.ArrayList底层是链表结构,Vector底层是数组结构
A.ArrayList myLis=new Object():
B.List myList--new ArrayList():
C.ArrayList myList=new List();
D.myList=new List();
数组(Array)和列表(ArrayList)有什么区别?什么时候应该使用Array而不是ArrayList?
A.ArrayList myList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.List myList=new List();
A.ArrayList myList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.List myList=new List();
A.ArrayList myList=new Object();
B.List myList=new ArrayList();
C.ArrayList myList=new List();
D.List myList=new List();