初学者求教

package items;

import gui.List;

import java.util.*;

public class TestSearch {
    public static ArrayList<Item> items = new ArrayList<Item>();

    public static void main(String[] args) {
    init();    
    
    for(int i = 0;i<items.size();i++){
        Item item = items.get(i);
        System.out.println(item);
    }    
    System.out.println("----------------------------------------");
    Scanner scanner = new Scanner(System.in);
    while(true){
        if(scanner.hasNextLine()){
        String tempString = scanner.nextLine();        
        Item item = getItem(tempString);
        if(item!=null)System.out.println(item);
        else System.out.println("not exisit ");
        }
    }

    }

    public static void init() {//为了测试效果 我将初始化一些数据
    items.add(Item.createItem(100000, "BHP", 35.00));
    items.add(Item.createItem(50000, "CTX", 12.50));
    items.add(Item.createItem(80000, "LYC", 1.91));
    items.add(Item.createItem(200000, "RIO", 76.50));
    items.add(Item.createItem(300000, "VBA", 0.34));
    items.add(Item.createItem(200000, "VAB", 1.34));
    items.add(Item.createItem(100000, "VBB", 2.34));
    }
    
    public static Item    getItem(String tempString){//如果code相等 则返回相应的item
    for(int i = 0;i<items.size();i++){
        Item item = items.get(i);
        if(item.getCode().equals(tempString))
        return item;        
    }
    return null;
    }
}

class Item {
    private int number;
    private String code;

    private double initialPrice;

    public Item(int number, String code, double initialPrice) {
    super();
    this.code = code;
    this.number = number;
    this.initialPrice = initialPrice;
    }

    public static Item createItem(int number, String code, double initialPrice) {
    return new Item(number, code, initialPrice);
    }

    public String getCode() {
    return code;
    }

    public void setCode(String code) {
    this.code = code;
    }

    public int getNumber() {
    return number;
    }

    public void setNumber(int number) {
    this.number = number;
    }

    public double getInitialPrice() {
    return initialPrice;
    }

    public void setInitialPrice(double initialPrice) {
    this.initialPrice = initialPrice;
    }
    
    public String toString(){//可以利用这个函数来控制输出格式
    String tempInitialPrice = String.format("%.2f", initialPrice);//为了保证保留两位小数
    return number+" " + code +  ":  $" +  tempInitialPrice;
    }

}
/*output:
100000 BHP:  $35.00
50000 CTX:  $12.50
80000 LYC:  $1.91
200000 RIO:  $76.50
300000 VBA:  $0.34
200000 VAB:  $1.34
100000 VBB:  $2.34
----------------------------------------
ABC
not exisit 
VBA
300000 VBA:  $0.34

 */















 


 



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