javaFx 学习--之组件篇1(边框与布局管理1Label)

这次我们学习Label标签(源码以上传):

代码如下:

 import javafx.ui.*;

 import java.lang.System;

     class Item {//定义类Item
            attribute id: String;//属性id 字符串类型
            attribute productId: String; //属性productId 字符串类型        --产品
            attribute description: String;//属性description 字符串类型    -- 描述
            attribute inStock: Boolean;//属性inStock 布尔类型             -- 库存
            attribute quantity: Number;//属性quantity 数字类型             --数量
            attribute listPrice: Number;//属性listPrice 数字类型世纪末  --价格列表
            attribute totalCost: Number;//属性totalCost 数字类型       --合计成本
        }

        attribute Item.totalCost = bind quantity*listPrice;//为属性Item里的totalCost绑定quantity*listPrice

        class Cart {
            attribute items: Item*;//定义属性items是Item类型并且是多个
            attribute subTotal: Number;//属性subTotal --合计
        }

        operation sumItems(itemList:Item*) {//操作方法
            var result = 0.00;//保存结果
            for (item in itemList) {
                result += item.totalCost;//用一定for循环进行合计成本累加
            }
            return result;//返回结果
        }

        attribute Cart.subTotal = bind sumItems(items);//为属性Cart里的subTotal绑定items

        var cart = Cart {//实例化Cart并赋值
            items:
            [Item {
                id: "UGLY"
                productId: "D100"
                description: "BullDog"
                inStock: true
                quantity: 1
                listPrice: 97.50
            },
            Item {
                id: "BITES"
                productId: "D101"
                description: "Pit Bull"
                inStock: true
                quantity: 1
                listPrice: 127.50
            }]
        };

        Frame {
             content: Label {//标签显示
                text: bind //显示绑定一个网页

                   "<html>
                       <h2 align='center'>Shopping Cart</h2>
                       <table align='center' border='0' bgcolor='#008800' cellspacing='2' cellpadding='5'>
                          <tr bgcolor='#cccccc'>
                             <td><b>Item ID</b></td>
                             <td><b>Product ID</b></td>
                             <td><b>Description</b></td>
                             <td><b>In Stock?</b></td>
                             <td><b>Quantity</b></td>
                             <td><b>List Price</b></td>
                             <td><b>Total Cost</b></td>
                             <td> </td>
                           </tr>

                           {     //类似jsp一堆混乱代码,不方便阅读,书写
                                 //html里夹java代码,java代码夹html代码
                             if (sizeof cart.items == 0)
                             then "<tr bgcolor='#FFFF88'><td colspan='8'><b>Your cart is empty.</b></td></tr>"
                             else foreach (item in cart.items)//循环显示结果
                                 "<tr bgcolor='#FFFF88'>
                                  <td>{item.id}</td>
                                  <td>{item.productId}</td>
                                  <td>{item.description}</td>
                                  <td>{if item.inStock then "Yes" else "No"}</td>
                                  <td>{item.quantity}</td>
                                  <td align='right'>{item.listPrice}</td>
                                  <td align='right'>{item.totalCost}</td>
                                  <td> </td>
                                  </tr>"
                           }

                           <tr bgcolor='#FFFF88'>
                                <td colspan='7' align='right'>
                                   <b>Sub Total: ${cart.subTotal}</b>//显示合计
                               </td>
                               <td> </td>
                            </tr>
                         </table>
                      </html>"
                }
                centerOnScreen:true//居中显示
                visible: true//设为可见
        }
图一.

javaFx 学习--之组件篇1(边框与布局管理1Label)_第1张图片

图二.

图三.

javaFx 学习--之组件篇1(边框与布局管理1Label)_第2张图片

图四.

javaFx 学习--之组件篇1(边框与布局管理1Label)_第3张图片

运行结果:

javaFx 学习--之组件篇1(边框与布局管理1Label)_第4张图片

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