Java Vector中怎么删除和添加元素

package com.me.service;

import com.me.domain.Book;
import com.me.utils.InUtil;
import com.me.view.BookView;

import java.util.Vector;

public class BookService {
private Vector books = new Vector();
// private Book book = new Book(1, "周树人", "《故乡》", "北京出版社", new BigDecimal(30));

/**
 * 获取所有的书
 * @return
 */
public Vector getAllBook() {
    return books;
}

/**
 * 添加图书

 * @param book
 */
public void addBook(Book book) {
    books.add(book);
}
public void delectbook (Book book)  {
    for (int i = 0; i < books.size(); i++ )
    {
        if (books.size() == 0){


        }else {

                return;
        }


    }
    books.remove(book);

}

public void SearchBook (Book book) {
books.elementAt(InUtil.readInt().equal(book [0].getBookId));
//输入参数.equal([下标].getBookId)

}

}
我应该在for循环中怎么获取getid，添加的输入参数和元素怎么选择

我看了一下里面的方法函数是有个add的，这是获取单个，那你要获取全部可以在里面用list加for遍历拿去，delectbook 的判断力的return报错了吧，Book是一个实体，你在里面for循环做些什么呢？除非是List