package com.publish.shop.order.javabeans;import java.math.*;import com.publish.shop.order.javabeans.ItemInfo;public class CartItem {  private ItemInfo item;  private int quantity;  private boolean inStock;  private BigDecimal total;  public CartItem(){    quantity = 0;  }  public ItemInfo getItem() {    return item;  }  public void setItem(ItemInfo item) {    this.item = item;  }  public int getQuantity() {    return quantity;  }  public void setQuantity(int quantity) {    this.quantity = quantity;  }  public boolean getInStock() {    return inStock;  }  public void setInStock(boolean inStock) {    this.inStock = inStock;  }  public BigDecimal getTotal() {    return total;  }  public void setTotal(BigDecimal total) {    this.total = total;  }  private void calcTotal()  {    if (item != null && item.getListPrice()!=null)    {      total = item.getListPrice().multiply(new BigDecimal(quantity));    }    else    {      total = null;    }  }  public void increaseQuantity()  {    quantity++;    calcTotal();  }}