java中方法定义与方法调用

package com.wengde.bookshop.service;

import com.wengde.bookshop1.dao.BookDAO;
import com.wengde.bookshop1.domin.Book;
import com.wengde.bookshop1.impl.BookDAOImpl;
import com.wengde.bookshop1.web.CriteriaBook;
import com.wengde.bookshop1.web.Page;

public class BookService {
    BookDAO  bookdao=new BookDAOImpl();
    public Page<Book>  getPage(CriteriaBook cb){//方法的定义，谁调用就必须提供调用方法的参数类型的参数
        return bookdao.getpage(cb);//方法的调用，提供参数类型的参数
        
    }
}