privatestocks.java

模拟股票交易市场设计的股票交易系统。采用软件工程思想设计

/*
 * privateStocks.java
 *
 * Created on 2003年5月1日, 上午9:10
 */

/**
 *
 * @author  超级用户
 */
import java.util.*;
public class privateStocks {
    private privateStock[] ps;
    private LinkedList ll=new LinkedList();
    private dataBase db;
    
    /** Creates a new instance of privateStocks */
    public privateStocks(java.lang.String username) {
        int num=db.getItemNum(username);
        ps=new privateStock[num];
        ps[0]=new privateStock(username, 0);
        ll.addFirst(ps[0]);
        for(int i=1;i<num;i++)
        {
            ps[i]=new privateStock(username,i);
            ll.addLast(ps[i]);
        }
    }
    
    public void save(java.lang.String username) {
        //for each stock[i] in stocks_link
        //stock.save(username,i)
        //next
        int size=ll.size();
        privateStock[] temp=new privateStock[size];
        ll.toArray(temp);
        for(int i=0;i<size;i++)
        {
            temp[i].save(username, i);
        }
    }
    
    public void add(java.lang.String stock_name, int num_have, double ave_cost) {
        privateStock temp=new privateStock(stock_name,num_have,ave_cost);
        ll.addLast(temp);
    }
    
    public void clear() {
        int size=ll.size();
        privateStock[] temp=new privateStock[size];
        ll.toArray(temp);
        for(int i=0;i<size;i++)
        {
            if(temp[i].getStockNum_have()==0)
                ll.remove(i);
        }
    }
    
    public boolean exist(java.lang.String stock_name) {
        int size=ll.size();
        privateStock[] temp=new privateStock[size];
        ll.toArray(temp);
        boolean flag=false;
        for(int i=0;i<size;i++)
        {
            if(temp[i].getStockName().compareTo(stock_name)==0){
                flag=true;
                break;
            }
        }
        return flag;
    }
    
    public void edit(java.lang.String stock_name, int num_have, double ave_cost) {
        int size=ll.size();
        privateStock[] temp=new privateStock[size];
        ll.toArray(temp);
        int index=0;
        for(int i=0;i<size;i++)
        {
            if(temp[i].getStockName().compareTo(stock_name)==0){
                index=i;
                break;
            }
        }
        privateStock temp1=new privateStock(stock_name, num_have, ave_cost);
        ll.set(index, temp1);
    }
    
}