zoukankan      html  css  js  c++  java
  • toPlainString() 和 toString()(转载)

             <!--一个博主专栏付费入口结束-->
            <link rel="stylesheet" href="https://csdnimg.cn/release/phoenix/template/css/ck_htmledit_views-d284373521.css">
                                        <link rel="stylesheet" href="https://csdnimg.cn/release/phoenix/template/css/ck_htmledit_views-d284373521.css">
                <div class="htmledit_views" id="content_views">
                                            <p><br></p><p></p><h2 style="padding:0px;font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">函数 toPlainString() 和 toString()</h2><p style="font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">对于 BigDecimal b ; (b=(0.4321)^ 20)&nbsp;<br>String s = b.toPlainString() ;&nbsp;<br>System.out.println(s) ;&nbsp;<br>输出为:&nbsp;<br>0.00000005148554641076956121994511276767154838481760200726351203835429763013462401</p><p style="font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">若String s = b.toString() ;&nbsp;<br>输出为:&nbsp;<br>5.148554641076956121994511276767154838481760200726351203835429763013462401E-8</p><p style="font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">在得到的小数,要对其小数点后面的零进行处理,用到:BigDecimal stripTrailingZeros() 返回数值上等于此小数,但从该表示形式移除所有尾部零的 BigDecimal。</p><p style="font-family:'-apple-system', 'SF UI Text', Arial, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', sans-serif, SimHei, SimSun;background-color:rgb(255,255,255);">对得到的数据用科学计数法就用:String toPlainString() 返回不带指数字段的此 BigDecimal 的字符串表示形式。<span style="font-weight:700;">通俗来讲就是直接显示,不用科学计数法表示。</span></p><br><pre><code class="language-java hljs"><ol class="hljs-ln"><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="1"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-keyword">import</span> java.math.BigDecimal;</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="2"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">BigDecimalDemo</span> </span>{</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="3"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    <span class="hljs-function"><span class="hljs-keyword">public</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">void</span> <span class="hljs-title">main</span><span class="hljs-params">(String[] args)</span> </span>{</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="4"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        BigDecimal bg = <span class="hljs-keyword">new</span> BigDecimal(<span class="hljs-string">"1E11"</span>);</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="5"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        System.out.println(bg.toEngineeringString());</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="6"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        System.out.println(bg.toPlainString());</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="7"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">        System.out.println(bg.toString());</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="8"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">    }</div></div></li><li><div class="hljs-ln-numbers"><div class="hljs-ln-line hljs-ln-n" data-line-number="9"></div></div><div class="hljs-ln-code"><div class="hljs-ln-line">}</div></div></li></ol></code><div class="hljs-button signin" data-title="登录后复制" onclick="hljs.signin(event)"></div></pre><br>输出<br> 100E+9<br> 100000000000<br> 1E+11<br>                                    </div>
                    </div>
    不一样的烟火
  • 相关阅读:
    cf B. Sereja and Suffixes
    cf E. Dima and Magic Guitar
    cf D. Dima and Trap Graph
    cf C. Dima and Salad
    最短路径问题(floyd)
    Drainage Ditches(网络流(EK算法))
    图结构练习—BFSDFS—判断可达性(BFS)
    Sorting It All Out(拓扑排序)
    Power Network(最大流(EK算法))
    Labeling Balls(拓扑)
  • 原文地址:https://www.cnblogs.com/cstdio1/p/11874413.html
Copyright © 2011-2022 走看看