Java快速掌握Vector类方法

public class Vector<E>
    extends AbstractList<E>
    implements List<E>, RandomAccess, Cloneable, java.io.Serializable

protected Object[] elementData;

public Vector() {
        this(10);
    }

public Vector(int initialCapacity) {
        this(initialCapacity, 0);
    }

/**
     * Constructs an empty vector with the specified initial capacity and
     * capacity increment.
     *
     * @param   initialCapacity     the initial capacity of the vector
     * @param   capacityIncrement   the amount by which the capacity is
     *  increased when the vector overflows向量溢出时容量增加的量 
     * @throws IllegalArgumentException if the specified initial capacity
     *         is negative
     */
public Vector(int initialCapacity, int capacityIncrement) {
        super();
        if (initialCapacity < 0)
            throw new IllegalArgumentException("Illegal Capacity: "+
                                               initialCapacity);
        this.elementData = new Object[initialCapacity];
        this.capacityIncrement = capacityIncrement;
    }

public Vector(Collection<? extends E> c) {
        elementData = c.toArray();
        elementCount = elementData.length;
        // c.toArray might (incorrectly) not return Object[] (see 6260652)
        if (elementData.getClass() != Object[].class)
            elementData = Arrays.copyOf(elementData, elementCount, Object[].class);
    }

import java.util.Vector;

/**
 * @autor 笑霸fianl~
 * 欢迎访问GitHub：https://github.com/XBfinal
 * 欢迎访问Gitee：https://gitee.com/XBfianl
 * 欢迎访问CSDN：https://blog.csdn.net/weixin_52062043
 */
public class enumeration01 {
    public static void main(String[] args) {
        Vector vector = new Vector();
        for(int i=0;i<10;i++){
            vector.add(i);
        }
        for(int i=0;i<10;i++){
            System.out.print(vector.get(i)+"\t");
        }
        vector.add(null);//可以存一个null
        System.out.println("\n"+"组件数="+vector.size());
        System.out.println("容量="+vector.capacity());
    }
}