www.hj888222.comJava.math.BigDecimal.negate()方法实例

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                <p>

<strong>java.math.BigDecimal.negate() </strong>返回一个BigDecimal,其值是(-this),其标度是this.scale()。</p>

<h2>

声明</h2>

<p>

以下是java.math.BigDecimal.negate()方法的声明</p>

<pre class="prettyprint prettyprinted">

<span class="kwd">public</span><span class="pln"> </span><span class="typ">BigDecimal</span><span class="pln"> negate</span><span class="pun">()</span></pre>

<h2>

参数</h2>

<ul>

<li>

    <p>

        NA</p>

</li>

</ul>

<h2>

返回值</h2>

<p>

此方法返回的对象的负值,即: -this</p>

<h2>

异常</h2>

<ul>

<li>

    <p>

        NA</p>

</li>

</ul>

<h2>

例子</h2>

<p>

下面的例子显示math.BigDecimal.negate()方法的用法</p>

<pre class="prettyprint prettyprinted">

<span class="kwd">package</span><span class="pln"> com</span><span class="pun">.</span><span class="pln">yiibai</span><span class="pun">;</span><span class="pln">

</span><span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">math</span><span class="pun">.*;</span><span class="pln">

</span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">BigDecimalDemo</span><span class="pln"> </span><span class="pun">{</span><span class="pln">

</span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">

  </span><span class="com">// create 2 BigDecimal objects</span><span class="pln">

  </span><span class="typ">BigDecimal</span><span class="pln"> bg1</span><span class="pun">,</span><span class="pln"> bg2</span><span class="pun">;</span><span class="pln">



  </span><span class="com">// assign value to bg1</span><span class="pln">

  bg1 </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">BigDecimal</span><span class="pun">(</span><span class="str">"40.1264"</span><span class="pun">);</span><span class="pln">



  </span><span class="com">// assign negate value of bg1 to bg2</span><span class="pln">

  bg2 </span><span class="pun">=</span><span class="pln"> bg1</span><span class="pun">.</span><span class="pln">negate</span><span class="pun">();</span><span class="pln">



  </span><span class="typ">String</span><span class="pln"> str </span><span class="pun">=</span><span class="pln"> </span><span class="str">"Negated value of "</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> bg1 </span><span class="pun">+</span><span class="pln"> </span><span class="str">" is "</span><span class="pun">+</span><span class="pln"> bg2</span><span class="pun">;</span><span class="pln">



  </span><span class="com">// print bg1 and bg2 values</span><span class="pln">

  </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="pln"> str </span><span class="pun">);</span><span class="pln">

</span><span class="pun">}</span><span class="pln">

</span><span class="pun">}</span></pre>

<p>

让我们编译和运行上面的程序,这将产生以下结果:</p>

<pre class="prettyprint prettyprinted">

<span class="typ">Negated</span><span class="pln"> value of </span><span class="lit">40.1234</span><span class="pln"> </span><span class="kwd">is</span><span class="pln"> </span><span class="pun">-</span><span class="lit">40.1264</span></pre>

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