shoppingcart.html

卡耐基课程练习

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<h2>
Class ShoppingCart</h2>
<pre><a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</a>
  <img src="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/resources/inherit.gif" alt="extended by "><b>ShoppingCart</b>
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<dt><pre>public class <b>ShoppingCart</b><dt>extends <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</a></dt></pre></dt></dl>

<p>
This class models a shopping cart.
 </p><p>
 It maintains a collection of <a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/Product.html" title="class in &lt;Unnamed&gt;"><code>Product</code></a> objects.
 </p>
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<dt><b>Version:</b></dt>
  <dd>1.0.0</dd>

<dt><b>Author:</b></dt>
  <dd>iCarnegie</dd>
<dt><b>See Also:</b></dt><dd><a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/Product.html" title="class in &lt;Unnamed&gt;"><code>Product</code></a></dd></dl>
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<b>Constructor Summary</b></font></th>
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<td><code><b><a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/ShoppingCart.html#ShoppingCart%28%29">ShoppingCart</a></b>()</code>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates an empty shopping cart.</td>
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<code>&nbsp;void</code></font></td>
<td><code><b><a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/ShoppingCart.html#addProduct%28Product%29">addProduct</a></b>(<a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/Product.html" title="class in &lt;Unnamed&gt;">Product</a>&nbsp;product)</code>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Adds a new product to this shopping cart.</td>
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<code>&nbsp;double</code></font></td>
<td><code><b><a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/ShoppingCart.html#getTotalValue%28%29">getTotalValue</a></b>()</code>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Computes the total value of the products in this shopping cart.</td>
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<code>&nbsp;<a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang" target="external">String</a></code></font></td>
<td><code><b><a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/ShoppingCart.html#toString%28%29">toString</a></b>()</code>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Obtains a <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang" target="external"><code>String</code></a> representation of all the products in
 this shopping cart.</td>
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<th align="left"><b>Methods inherited from class java.lang.<a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang" target="external">Object</a></b></th>
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<td><code><a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#clone%28%29" title="class or interface in java.lang" target="external">clone</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#equals%28java.lang.Object%29" title="class or interface in java.lang" target="external">equals</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#finalize%28%29" title="class or interface in java.lang" target="external">finalize</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#getClass%28%29" title="class or interface in java.lang" target="external">getClass</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#hashCode%28%29" title="class or interface in java.lang" target="external">hashCode</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#notify%28%29" title="class or interface in java.lang" target="external">notify</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#notifyAll%28%29" title="class or interface in java.lang" target="external">notifyAll</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#wait%28%29" title="class or interface in java.lang" target="external">wait</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#wait%28long%29" title="class or interface in java.lang" target="external">wait</a>, <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#wait%28long,%20int%29" title="class or interface in java.lang" target="external">wait</a></code></td>

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<a name="ShoppingCart()"><!-- --></a><h3>

ShoppingCart</h3>
<pre>public <b>ShoppingCart</b>()</pre>
<dl>
<dd>Creates an empty shopping cart.
<p>
</p></dd></dl>

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<a name="addProduct(Product)"><!-- --></a><h3>
addProduct</h3>
<pre>public void <b>addProduct</b>(<a href="Product.html" title="class in &lt;Unnamed&gt;">Product</a>&nbsp;product)</pre>
<dl>
<dd>Adds a new product to this shopping cart.
<p>

</p></dd><dd><dl>
<dt><b>Parameters:</b></dt><dd><code>product</code> - the <a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/Product.html" title="class in &lt;Unnamed&gt;"><code>Product</code></a> object.</dd></dl>
</dd>
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<a name="toString()"><!-- --></a><h3>
toString</h3>
<pre>public <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang">String</a> <b>toString</b>()</pre>

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<dd>Obtains a <a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/String.html" title="class or interface in java.lang" target="external"><code>String</code></a> representation of all the products in
 this shopping cart.
<p>
</p></dd><dd><dl>
<dt><b>Overrides:</b></dt><dd><code><a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html#toString%28%29" title="class or interface in java.lang" target="external">toString</a></code> in class <code><a href="http://java.sun.com/j2se/1.5/docs/api/java/lang/Object.html" title="class or interface in java.lang" target="external">Object</a></code></dd></dl>
</dd>
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<dt><b>Returns:</b></dt><dd>if cart is not empty, a <code>String</code> with the
 information of every product in cart; otherwise the <code>String</code>

 "empty".</dd><dt><b>See Also:</b></dt><dd><a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/Product.html#toString%28%29"><code>Product.toString()</code></a></dd></dl>
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<a name="getTotalValue()"><!-- --></a><h3>
getTotalValue</h3>
<pre>public double <b>getTotalValue</b>()</pre>
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<dd>Computes the total value of the products in this shopping cart.
 <p>
 This is done by summing the values of each product.
 </p>
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</p></dd><dd><dl>

<dt><b>Returns:</b></dt><dd>the total value of the products in this shopping cart.</dd><dt><b>See Also:</b></dt><dd><a href="/content/SSD/SSD3/4.2.0.1/normal/pg-class-dsgn/pg-java-apps/assm-exer-read-obj-data/pool-pr-apps-io-tokenzr-excptns/qn-pr-shopping-cart/handout/Product.html#getValue%28%29"><code>Product.getValue()</code></a></dd></dl>
</dd>
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