vector和arraylist 区别
vector 和 arrayList 都是对一段数组进行操作, 都继承了AbstractList
vector 实现的都是线程安全的
- public synchronized E get(int index)
- public synchronized E set(int index, E element)
- public synchronized boolean add(E e)
- public synchronized E remove(int index)
ArrayList实现的是非线程安全
- public E get(int index)
- public E set(int index, E element)
- public boolean add(E e)
- public E remove(int index)