elper</span>
extends java.lang.Object</pre>
<div class="block">数学计算助手
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     包含常见数学运算的静态函数。
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<h3>构造器概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造�