📄 exe5.html
字号:
</ul>
<ul>
<li> <code><em>private XMLSalesFormatter()</em></code>. Constructor that is
declared private so it is inaccessible to other classes. A private constructor
makes it impossible for any other class to create an instance of class <code>XMLSalesFormatter</code>.</li>
</ul>
<ul>
<li> <code><em>public String formatSales(Sales sales)</em></code>. Produces
a string that contains the specified sales information in an XML format.</li>
</ul>
<blockquote>
<ul>
<li>The string should begin with the following XML: </li>
<blockquote>
<pre><Sales></pre>
</blockquote>
<li>Each order in the sales information should have the following format:
<pre> <Order total="<em>totalCost</em>"><br> <OrderItem quantity="<em>quantity1</em>" price="<em>price1</em>"><em>code1</em></OrderItem>
...<br> <OrderItem quantity="<em>quantityN</em>" price="<em>priceN</em>"><em>codeN</em></OrderItem><br> </Order></pre>
<p> where:</p>
</li>
</ul>
<ul>
<ul>
<li><em>quantityX</em> is the quantity of the product.</li>
<li><em>codeX</em> is the code of the product.</li>
<li><em>priceX</em> is the price of the product.</li>
<li><em>totalCost</em> is the total cost of the order.</li>
</ul>
</ul>
<ul>
<li>The string should end with the following XML:
<blockquote>
<pre></Sales></pre>
</blockquote>
</li>
</ul>
</blockquote>
<h4>Class <code>GourmetCoffee</code></h4>
<p>Class <code>GourmetCoffee</code> lets the user display the sales information
in one of three formats: plain text, HTML, or XML. A partial implementation
of this class is provided in the student archive. </p>
<p><em>Instance variables:</em></p>
<ul>
<li><code><em>private Sales sales</em></code>. A list of the orders that have
been paid for.</li>
</ul>
<ul>
<li><code><em>private SalesFormatter salesFormatter</em></code>. A reference
variable that refers to the current formatter: a <code>PlainTextSalesFormatter</code>,
<code>HTMLSalesFormatter</code>, or <code>XMLSalesFormatter</code> object.</li>
</ul>
<p><em>Constructor and methods:</em></p>
<p>The following methods and constructor are complete and require no modification:</p>
<ul>
<li> <code><em>public static void main(String[] args) throws IOException</em></code>.
Starts the application.</li>
</ul>
<ul>
<li> <code><em>private GourmetCoffee()</em></code>. Initialize instance variables
<code>sales</code> and <code>salesFormatter</code>.</li>
</ul>
<ul>
<li> <code><em>private Catalog loadCatalog()</em></code>.Populates the product
catalog.</li>
</ul>
<ul>
<li> <code><em>private void loadSales(Catalog catalog)</em></code>. Populates
the <code>sales</code> object.</li>
</ul>
<ul>
<li><code><em>private int getChoice() throws IOException</em></code>. Displays
a menu of options and verifies the user's choice.</li>
</ul>
<p>The following methods should be completed:</p>
<ul>
<li><code><em>private void setSalesFormatter(SalesFormatter newFormatter)</em></code>.
Changes the current formatter by updating the instance variable <code>salesFormatter</code>
with the object specified in the parameter <code>newFormatter</code>.</li>
</ul>
<ul>
<li><code><em>private void displaySales()</em></code>. Displays the sales information
in the standard output using the method <code>salesFormatter.formatSales</code>
to obtain the sales information in the current format.</li>
</ul>
<ul>
<li><code><em>private void run() throws IOException</em></code>. Presents the
user with a menu of options and executes the selected task </li>
</ul>
<ul>
<ul>
<li>If the user chooses option 1, <code>run</code> calls method <code>setSalesFormatter</code>
with the singleton instance of class <code>PlainTextSalesFormatter</code>,
and calls method <code>displaySales</code> to display the sales information
in the standard output.</li>
</ul>
</ul>
<ul>
<ul>
<li>If the user chooses option 2, <code>run</code> calls method <code>setSalesFormatter</code>
with the singleton instance of class <code>HTMLSalesFormatter</code>, and
calls method <code>displaySales</code> to display the sales information
in the standard output.</li>
</ul>
</ul>
<ul>
<ul>
<li>If the user chooses option 3, <code>run</code> calls method <code>setSalesFormatter</code>
with the singleton instance of class <code>XMLTextSalesFormatter</code>,
and calls method <code>displaySales</code> to display the sales information
in the standard output.</li>
</ul>
</ul>
<h3>Files</h3>
The following files are needed to complete this assignment:
<ul>
<li><cite><a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-imp/pg-adv-clss-dsgn/assm-exer-dsgn-ptrns/pool-pr-dsgn-ptrns/qn-pr-formtr-gou-sys/handout/student-files.zip"><code>student-files.zip</code></a></cite>
— Download this file. This archive contains the following:
<ul>
<li>Class files
<ul>
<li><cite><code>Coffee.class</code></cite></li>
<li><cite><code>CoffeeBrewer.class</code></cite></li>
<li><cite><code>Product.class</code></cite> </li>
<li><cite><code>Catalog.class</code></cite> </li>
<li><cite><code>OrderItem.class</code></cite> </li>
<li><cite><code>Order.class</code></cite> </li>
<li><cite><code>Sales.class</code></cite></li>
</ul>
</li>
<li>Documentation
<ul>
<li><cite><code>Coffee.html</code></cite></li>
<li><cite><code>CoffeeBrewer.html</code></cite></li>
<li><cite><code>Product.html</code></cite><code><cite> </cite></code></li>
<li><cite><code>Catalog.html</code></cite><code><cite></cite></code>
</li>
<li> <cite><code>OrderItem.html</code></cite> </li>
<li><cite><code>Order.html</code></cite> </li>
<li><cite><code>Sales.html</code></cite> </li>
</ul>
</li>
<li><cite><code>GourmetCoffee.java</code></cite>. A partial implementation
of the class <code>GourmetCoffee</code>.</li>
</ul>
</li>
</ul>
<h3>Tasks </h3>
<p>Implement the interface <code>SalesFormatter</code> and the classes <code>PlainTextSalesFormatter</code>,
<code>HTMLSalesFormatter</code>, <code>XMLSalesFormatter</code>. Finish the
implementation of class <code>GourmetCoffee</code>. Document using Javadoc and
follow Sun's code conventions. The following steps will guide you through this
assignment. Work incrementally and test each increment. Save often.</p>
<ol start="1">
<li><strong>Extract </strong> the files by
issuing the following command at the command prompt:
<p><tt>C:\></tt><kbd>unzip student-files.zip</kbd> </p>
</li>
<li><strong>Then</strong>, implement interface <code>SalesFormatter</code> from
scratch.</li>
</ol>
<ol start="3">
<li><strong>Next</strong>, implement class <code>PlainTextSalesFormatter</code>
from scratch.</li>
</ol>
<ol start="4">
<li><strong>Then</strong>, implement class <code>HTMLSalesFormatter</code> from
scratch.</li>
</ol>
<ol start="5">
<li><strong>Next</strong>, implement class <code>XMLSalesFormatter</code> from
scratch.</li>
</ol>
<ol start="6">
<li><strong>Then</strong>, complete the method <code>GourmetCoffee.setSalesFormatter</code>.</li>
</ol>
<ol start="7">
<li><strong>Next</strong>, complete the method <code>GourmetCoffee.</code><code>displaySales</code>.</li>
</ol>
<ol start="8">
<li><strong>Then</strong>, complete the method <code>GourmetCoffee.run</code>.</li>
</ol>
<ol start="9">
<li><strong>Finally</strong>, compile and execute the class <code>GourmetCoffee</code>.
Sales information has been hard-coded in the <code>GourmetCoffee</code> template
provided by iCarnegie.
<p></p>
<ul>
<li>If the user chooses to display the sales information in plain text,
the output should be:
<blockquote>
<pre>------------------------
Order 1
5 C001 17.99
Total = 89.94999999999999
------------------------
Order 2
2 C002 18.75
2 A001 9.0
Total = 55.5
------------------------
Order 3
1 B002 200.0
Total = 200.0</pre>
</blockquote>
</li>
<li>If the user chooses to display the sales information in HTML, the output
should be:
<blockquote>
<pre><html><br> <body><br> <center><h2>Orders</h2></center><br> <hr><br> <h4>Total = 89.94999999999999</h4><br> <p><br> <b>code:</b> C001<br><br> <b>quantity:</b> 5<br><br> <b>price:</b> 17.99<br> </p><br> <hr><br> <h4>Total = 55.5</h4><br> <p><br> <b>code:</b> C002<br><br> <b>quantity:</b> 2<br><br> <b>price:</b> 18.75<br> </p><br> <p><br> <b>code:</b> A001<br><br> <b>quantity:</b> 2<br><br> <b>price:</b> 9.0<br> </p><br> <hr><br> <h4>Total = 200.0</h4><br> <p><br> <b>code:</b> B002<br><br> <b>quantity:</b> 1<br><br> <b>price:</b> 200.0<br> </p><br> </body><br></html>
</pre>
</blockquote>
</li>
<li>If the user chooses to display the sales information in XML, the output
should be:
<blockquote>
<pre><Sales><br> <Order total="89.94999999999999"><br> <OrderItem quantity="5" price="17.99">C001</OrderItem><br> </Order><br> <Order total="55.5"><br> <OrderItem quantity="2" price="18.75">C002</OrderItem><br> <OrderItem quantity="2" price="9.0">A001</OrderItem><br> </Order><br> <Order total="200.0"><br> <OrderItem quantity="1" price="200.0">B002</OrderItem><br> </Order><br></Sales>
</pre>
</blockquote>
</li>
</ul>
</li>
</ol>
<h3>Submission</h3>
<p>Upon completion, submit <strong>only</strong> the following:</p>
<ol>
<li><code>SalesFormatter.java</code></li>
<li><code>PlainTextSalesFormatter.java</code></li>
<li><code>HTMLSalesFormatter.java</code></li>
<li><code>XMLSalesFormatter.java</code></li>
<li><code>GourmetCoffee.java</code></li>
</ol>
</td>
<td width="5"><br></td></tr></tbody></table>
<a name="14555"></a><table><tbody><tr>
<td width="5"><br></td> <td class="td0_x" align="left" valign="top"> <a href="#top_14555">Go to top of question.</a> </td>
<td width="5"><br></td></tr></tbody></table>
<hr><table><tbody><tr>
<td width="5"><br></td> <td class="td0_x" align="left" valign="top"><label class="lbl0-x" for="file_to_add_14555">File to submit:</label><br> <input class="x" name="file_to_add_14555" value="" size="20" maxlength="500" type="file"> </td>
<td width="5"><br></td><td valign="bottom"> <input class="x" value="Upload File" name="add_file" id="add_file" style="width: 12em;" onclick='return SetUploadTime("https://seqcc.icarnegie.com:443/takeassmcmd.php?question_id=14555", 14555, false)' type="submit"></td><td width="5"><br></td></tr></tbody></table>
<hr><input name="pr_state_14555" id="pr_state_14555" value="a:2:{i:0;s:10:"incomplete";i:1;a:0:{}}" type="hidden"><table><tbody><tr>
</tr></tbody></table>
<input name="max_mins_per_try" id="max_mins_per_try" value="120" type="hidden"> <input value="2008-11-29 10:56:22 UTC" id="end_date" name="end_date" type="hidden"> <input value="421063" id="course_section_id" name="course_section_id" type="hidden"> <input value="14552" id="assm_id" name="assm_id" type="hidden"> <input value="657817" id="template_id" name="template_id" type="hidden"> <input value="657818" id="record_id" name="record_id" type="hidden"> <input value="" id="client_time" name="client_time" type="hidden"><table><tbody><tr>
<td width="5"><br></td> <td class="td0_x" align="left" valign="top"> <a href="#top_of_page">Go to top of assessment.</a> </td>
</tr></tbody></table>
<table><tbody><tr>
<td width="5"><br></td> <td class="td0_copyright" align="left" valign="top"> ? Copyright 2006 iCarnegie, Inc. All rights reserved. </td>
</tr></tbody></table>
</form>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -