目录

ArrayList

linkedList

ArrayList

继承关系

public abstract class AbstractCollection implements Collection 
public abstract class AbstractList extends AbstractCollection implements List 
public class ArrayList extends AbstractListimplements List, RandomAccess, Cloneable, java.io.Serializable 

查询

E get(int index); public E get(int index) { Objects.checkIndex(index, size);//校验长度 return elementData(index); } @ForceInline public static int checkIndex(int index, int length) { return Preconditions.checkIndex(index, length, null); }