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📁 用EMMA测试Java类
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<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* @exception<span style="mso-spacerun:
yes">&nbsp; </span>EmptyStackException<span style="mso-spacerun: yes">&nbsp;
</span>if this stack is empty.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*/</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>public synchronized Object pop() {</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>Object<span
style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp; </span>obj;</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>int<span
style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>len = size();</span></p>

<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>obj
= peek();</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>removeElementAt(len
- 1);</span></p>

<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>return
obj;</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>}</span></p>

<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>/**</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* Looks at the object at the top of this
stack without removing it </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* from the stack. </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* @return<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>the object at the top of this stack (the
last item </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>of the &lt;tt&gt;Vector&lt;/tt&gt; object). </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* @exception<span style="mso-spacerun:
yes">&nbsp; </span>EmptyStackException<span style="mso-spacerun: yes">&nbsp;
</span>if this stack is empty.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*/</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>public synchronized Object peek() {</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>int<span
style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp; </span>len = size();</span></p>

<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>if
(len == 0)</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>throw new
EmptyStackException();</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>return
elementAt(len - 1);</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>}</span></p>

<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>/**</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* Tests if this stack is empty.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* @return<span style="mso-spacerun:
yes">&nbsp; </span>&lt;code&gt;true&lt;/code&gt; if and only if this stack
contains </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>no items;
&lt;code&gt;false&lt;/code&gt; otherwise.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*/</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>public boolean empty() {</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>return
size() == 0;</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>}</span></p>

<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>/**</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* Returns the 1-based position where an
object is on this stack. </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* If the object &lt;tt&gt;o&lt;/tt&gt;
occurs as an item in this stack, this </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* method returns the distance from the top
of the stack of the </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* occurrence nearest the top of the stack;
the topmost item on the </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* stack is considered to be at distance
&lt;tt&gt;1&lt;/tt&gt;. The &lt;tt&gt;equals&lt;/tt&gt; </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* method is used to compare
&lt;tt&gt;o&lt;/tt&gt; to the </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* items in this stack.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* @param<span style="mso-spacerun:
yes">&nbsp;&nbsp; </span>o<span style="mso-spacerun: yes">&nbsp;&nbsp;
</span>the desired object.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* @return<span style="mso-spacerun:
yes">&nbsp; </span>the 1-based position from the top of the stack where </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>the object
is located; the return value &lt;code&gt;-1&lt;/code&gt;</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>indicates
that the object is not on the stack.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*/</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>public synchronized int search(Object o) {</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>int
i = lastIndexOf(o);</span></p>

<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>if
(i &gt;= 0) {</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span
style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>return size() - i;</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>}</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>return
-1;</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>}</span></p>

<p class=MsoNormal><span lang=EN-US><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>/**</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* Returns the index of the last occurrence
of the specified object in</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* this vector.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* @param<span style="mso-spacerun:
yes">&nbsp;&nbsp; </span>elem<span style="mso-spacerun: yes">&nbsp;&nbsp;
</span>the desired component.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>* @return<span style="mso-spacerun:
yes">&nbsp; </span>the index of the last occurrence of the specified object in</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>this vector,
that is, the largest value &lt;tt&gt;k&lt;/tt&gt; such that </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</span>&lt;tt&gt;elem.equals(elementData[k])&lt;/tt&gt; is
&lt;tt&gt;true&lt;/tt&gt;; </span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>returns
&lt;code&gt;-1&lt;/code&gt; if the object is not found.</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp; </span>*/</span></p>

<p class=MsoNormal><span lang=EN-US><span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp; </span>public int lastIndexOf(Object elem) {</span></p>

<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>return
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