lendingset.java

本人写的一个简单VCD租赁系统

//************************************************
//LendingSet.java
//This class is used to describe the structure for
//storing all the lending records.
//Created by Xiaobin Lin               2/Dec/2004
//************************************************

package Main;

import java.io.*;
import java.util.*;

public class LendingSet implements Serializable{
    
    //Creates a new instance of LendingSet
    public LendingSet() {
        lendingList = new LinkedList();
    }
    
    public void addNewLending(Lending lending){
        lendingList.add(lending);
    }
    
    public int findMember(int memberNo){
        // Iterate through the LinkedList
        ListIterator i = lendingList.listIterator();
        while(i.hasNext())
        {
            if (((Lending)i.next()).getMemberNo() == memberNo){
                return i.nextIndex() - 1;
            }
        }
        return -1;
    }
    
    public int findVideo(int videoIndex){
         // Iterate through the LinkedList
        ListIterator i = lendingList.listIterator();
        while(i.hasNext())
        {
            if (((Lending)i.next()).getVideoIndex() == videoIndex){
                return i.nextIndex() - 1;
            }
        }
        return -1;
    }
    
    public int getVideoIndex(int recordIndex){
        int videoIndex = ((Lending)lendingList.get(recordIndex)).getVideoIndex();
        return videoIndex;
    }
    
    public void removeLending(int lendingIndex){
        lendingList.remove(lendingIndex);
    }
    
    //use linkedlist to store all the single lending record
    private LinkedList lendingList;        
}