BigDecimal加减乘除运算（转）
-
java.math.BigDecimal。BigDecimal一共有4个够造方法，让我先来看看其中的两种用法：
第一种：BigDecimal(double val)
Translates a double into a BigDecimal.第二种：BigDecimal(String val)
Translates the String repre sentation of a BigDecimal into a BigDecimal.使用BigDecimal要用String来够造，要做一个加法运算，需要先将两个浮点数转为String，然后够造成BigDecimal，在其中一个上调用add方法，传入另一个作为参数，然后把运算的结果（BigDecimal）再转换为浮点数。
public static double add(double v1,double v2)
public static double sub(double v1,double v2)
public static double mul(double v1,double v2)
public static double div(double v1,double v2)
public static double div(double v1,double v2,int scale)
public static double round(double v,int scale)import java.math.BigDecimal;
/**
* 由于Java的简单类型不能够精确的对浮点数进行运算，这个工具类提供精
* 确的浮点数运算，包括加减乘除和四舍五入。
*/
public class Arith{ //默认除法运算精度
private static final int DEF_DIV_SCALE = 10; //这个类不能实例化
private Arith(){
}
/**
* 提供精确的加法运算。
* @param v1 被加数
* @param v2 加数
* @return 两个参数的和
*/
public static double add(double v1,double v2){
BigDecimal b1 = new BigDecimal(Double.toString(v1));
BigDecimal b2 = new BigDecimal(Double.toString(v2));
return b1.add(b2).doubleValue();
}
/**
* 提供精确的减法运算。
* @param v1 被减数
* @param v2 减数
* @return 两个参数的差
*/
public static double sub(double v1,double v2){
BigDecimal b1 = new BigDecimal(Double.toString(v1));
BigDecimal b2 = new BigDecimal(Double.toString(v2));
return b1.subtract(b2).doubleValue();
}
/**
* 提供精确的乘法运算。
* @param v1 被乘数
* @param v2 乘数
* @return 两个参数的积
*/
public static double mul(double v1,double v2){
BigDecimal b1 = new BigDecimal(Double.toString(v1));
BigDecimal b2 = new BigDecimal(Double.toString(v2));
return b1.multiply(b2).doubleValue();
}
/**
* 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到
* 小数点以后10位，以后的数字四舍五入。
* @param v1 被除数
* @param v2 除数
* @return 两个参数的商
*/
public static double div(double v1,double v2){
return div(v1,v2,DEF_DIV_SCALE);
}
/**
* 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指
* 定精度，以后的数字四舍五入。
* @param v1 被除数
* @param v2 除数
* @param scale 表示表示需要精确到小数点以后几位。
* @return 两个参数的商
*/
public static double div(double v1,double v2,int scale){
if(scale<0){
throw new IllegalArgumentException(
"The scale must be a positive integer or zero");
}
BigDecimal b1 = new BigDecimal(Double.toString(v1));
BigDecimal b2 = new BigDecimal(Double.toString(v2));
return b1.divide(b2,scale,BigDecimal.ROUND_HALF_UP).doubleValue();
}
/**
* 提供精确的小数位四舍五入处理。
* @param v 需要四舍五入的数字
* @param scale 小数点后保留几位
* @return 四舍五入后的结果
*/
public static double round(double v,int scale){
if(scale<0){
throw new IllegalArgumentException("The scale must be a positive integer or zero");
}
BigDecimal b = new BigDecimal(Double.toString(v));
BigDecimal one = new BigDecimal("1");
return b.divide(one,scale,BigDecimal.ROUND_HALF_UP).doubleValue();
}
};
<p>java.math.BigDecimal。BigDecimal一共有4个够造方法，让我先来看看其中的两种用法：</p>
<p>第一种：BigDecimal(double val)<br>
Translates a double into a BigDecimal. </p>
<p>第二种：BigDecimal(String val)<br>
Translates the String repre sentation of a BigDecimal into a BigDecimal. </p>
<p>使用BigDecimal要用String来够造，要做一个加法运算，需要先将两个浮点数转为String，然后够造成BigDecimal，在其中一个上调用add方法，传入另一个作为参数，然后把运算的结果（BigDecimal）再转换为浮点数。</p>
<p><br>
public static double add(double v1,double v2)<br>
public static double sub(double v1,double v2)<br>
public static double mul(double v1,double v2)<br>
public static double div(double v1,double v2)<br>
public static double div(double v1,double v2,int scale)<br>
public static double round(double v,int scale)</p>
<p> </p>
<div class="">
dp-highlighter<div class="">
bar<div class="">Java代码 <toolsa title="" 复制代码href="">
http://callan.iteye.com/blog/200526#<img alt="" 复制代码src=""></http://callan.iteye.com/images/icon_copy.gifa> <a title="" 收藏这段代码href=""><img class="" staralt="" 收藏代码src=""><http://callan.iteye.com/images/icon_star.pngimg class="" spinnersrc="" http://callan.iteye.com/images/spinner.gifalt="" style=""></a></div>
</div>
<ol class="">
dp-j<li><span><span class="">import</keywordspan><span> java.math.BigDecimal; </span></span></li><li><span></span><span class="">/** </commentspan> </li><li><span><span class="">*comment 由于Java的简单类型不能够精确的对浮点数进行运算，这个工具类提供精 </span> </span></li><li><span><span class="">*comment 确的浮点数运算，包括加减乘除和四舍五入。 </span> </span></li><li><span><span class="">*/</commentspan><span> </span></span></li><li><span></span><span class="">public</keywordspan><span> </span><span class="">class</keywordspan><span> Arith{ </span><span class="">//默认除法运算精度
comment</span><span> </span></li><li><span></span><span class="">private</keywordspan><span> </span><span class="">static</keywordspan><span> </span><span class="">final</keywordspan><span> </span><span class="">int</keywordspan><span> DEF_DIV_SCALE = </span><span class="">10</numberspan><span>; </span><span class="">//这个类不能实例化
comment</span><span> </span></li><li><span></span><span class="">private</keywordspan><span> Arith(){ </span></li><li><span>} </span></li><li><span></span><span class="">/** </commentspan> </li><li><span><span class="">*comment 提供精确的加法运算。 </span> </span></li><li><span><span class="">*comment @param v1 被加数 </span> </span></li><li><span><span class="">*comment @param v2 加数 </span> </span></li><li><span><span class="">*comment @return 两个参数的和 </span> </span></li><li><span><span class="">*/</commentspan><span> </span></span></li><li><span></span><span class="">public</keywordspan><span> </span><span class="">static</keywordspan><span> </span><span class="">double</keywordspan><span> add(</span><span class="">double</keywordspan><span> v1,</span><span class="">double</keywordspan><span> v2){
</span></li><li><span>BigDecimal b1 = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v1)); </span></li><li><span>BigDecimal b2 = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v2)); </span></li><li><span></span><span class="">return</keywordspan><span> b1.add(b2).doubleValue(); </span></li><li><span>} </span></li><li><span></span><span class="">/** </commentspan> </li><li><span><span class="">*comment 提供精确的减法运算。 </span> </span></li><li><span><span class="">*comment @param v1 被减数 </span> </span></li><li><span><span class="">*comment @param v2 减数 </span> </span></li><li><span><span class="">*comment @return 两个参数的差 </span> </span></li><li><span><span class="">*/</commentspan><span> </span></span></li><li><span></span><span class="">public</keywordspan><span> </span><span class="">static</keywordspan><span> </span><span class="">double</keywordspan><span> sub(</span><span class="">double</keywordspan><span> v1,</span><span class="">double</keywordspan><span> v2){
</span></li><li><span>BigDecimal b1 = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v1)); </span></li><li><span>BigDecimal b2 = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v2)); </span></li><li><span></span><span class="">return</keywordspan><span> b1.subtract(b2).doubleValue(); </span></li><li><span>} </span></li><li><span></span><span class="">/** </commentspan> </li><li><span><span class="">*comment 提供精确的乘法运算。 </span> </span></li><li><span><span class="">*comment @param v1 被乘数 </span> </span></li><li><span><span class="">*comment @param v2 乘数 </span> </span></li><li><span><span class="">*comment @return 两个参数的积 </span> </span></li><li><span><span class="">*/</commentspan><span> </span></span></li><li><span></span><span class="">public</keywordspan><span> </span><span class="">static</keywordspan><span> </span><span class="">double</keywordspan><span> mul(</span><span class="">double</keywordspan><span> v1,</span><span class="">double</keywordspan><span> v2){
</span></li><li><span>BigDecimal b1 = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v1)); </span></li><li><span>BigDecimal b2 = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v2)); </span></li><li><span></span><span class="">return</keywordspan><span> b1.multiply(b2).doubleValue(); </span></li><li><span>} </span></li><li><span></span><span class="">/** </commentspan> </li><li><span><span class="">*comment 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到 </span> </span></li><li><span><span class="">*comment 小数点以后10位，以后的数字四舍五入。 </span> </span></li><li><span><span class="">*comment @param v1 被除数 </span> </span></li><li><span><span class="">*comment @param v2 除数 </span> </span></li><li><span><span class="">*comment @return 两个参数的商 </span> </span></li><li><span><span class="">*/</commentspan><span> </span></span></li><li><span></span><span class="">public</keywordspan><span> </span><span class="">static</keywordspan><span> </span><span class="">double</keywordspan><span> div(</span><span class="">double</keywordspan><span> v1,</span><span class="">double</keywordspan><span> v2){
</span></li><li><span></span><span class="">return</keywordspan><span> div(v1,v2,DEF_DIV_SCALE); </span></li><li><span>} </span></li><li><span></span><span class="">/** </commentspan> </li><li><span><span class="">*comment 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指 </span> </span></li><li><span><span class="">*comment 定精度，以后的数字四舍五入。 </span> </span></li><li><span><span class="">*comment @param v1 被除数 </span> </span></li><li><span><span class="">*comment @param v2 除数 </span> </span></li><li><span><span class="">*comment @param scale 表示表示需要精确到小数点以后几位。 </span> </span></li><li><span><span class="">*comment @return 两个参数的商 </span> </span></li><li><span><span class="">*/</commentspan><span> </span></span></li><li><span></span><span class="">public</keywordspan><span> </span><span class="">static</keywordspan><span> </span><span class="">double</keywordspan><span> div(</span><span class="">double</keywordspan><span> v1,</span><span class="">double</keywordspan><span> v2,</span><span class="">int</keywordspan><span> scale){
</span></li><li><span></span><span class="">if</keywordspan><span>(scale<</span><span class="">0</numberspan><span>){ </span></li><li><span></span><span class="">throw</keywordspan><span> </span><span class="">new</keywordspan><span> IllegalArgumentException( </span></li><li><span></span><span class="">string"The scale must be a positive integer or zero"</span><span>); </span></li><li><span>} </span></li><li><span>BigDecimal b1 = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v1)); </span></li><li><span>BigDecimal b2 = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v2)); </span></li><li><span></span><span class="">return</keywordspan><span> b1.divide(b2,scale,BigDecimal.ROUND_HALF_UP).doubleValue(); </span></li><li><span>} </span></li><li><span></span><span class="">/** </commentspan> </li><li><span><span class="">*comment 提供精确的小数位四舍五入处理。 </span> </span></li><li><span><span class="">*comment @param v 需要四舍五入的数字 </span> </span></li><li><span><span class="">*comment @param scale 小数点后保留几位 </span> </span></li><li><span><span class="">*comment @return 四舍五入后的结果 </span> </span></li><li><span><span class="">*/</commentspan><span> </span></span></li><li><span></span><span class="">public</keywordspan><span> </span><span class="">static</keywordspan><span> </span><span class="">double</keywordspan><span> round(</span><span class="">double</keywordspan><span> v,</span><span class="">int</keywordspan><span> scale){
</span></li><li><span></span><span class="">if</keywordspan><span>(scale<</span><span class="">0</numberspan><span>){ </span></li><li><span></span><span class="">throw</keywordspan><span> </span><span class="">new</keywordspan><span> IllegalArgumentException(</span><span class="">string"The scale must be a positive integer or zero"</span><span>); </span></li><li><span>} </span></li><li><span>BigDecimal b = </span><span class="">new</keywordspan><span> BigDecimal(Double.toString(v)); </span></li><li><span>BigDecimal one = </span><span class="">new</keywordspan><span> BigDecimal(</span><span class="">string"1"</span><span>); </span></li><li><span></span><span class="">return</keywordspan><span> b.divide(one,scale,BigDecimal.ROUND_HALF_UP).doubleValue(); </span></li><li><span>} </span></li><li><span>}; </span></li></ol>
</div>
<link rel="" stylesheethref="" />
http://static.blog.csdn.net/public/res-min/markdown_views.css?v=1.0 </div>
</dd>
</dl>
</div>
<div class="">
skin_nav <div class=""><skin_editi class=""></fa fa-th-listi>
<div class=""><nav_list nav_list_edita href="">文章列表<//huiwenjie168a></div>
</div> </div>
<div class="">
rssFix <a href="" http://blog.csdn.net/huiwenjie168/rss/listclass="" columnonclick=""><_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_RSS'])i class=""></fa fa-rssi></a>
</div> <div id="" goTopBtnclass=""><skin_backTopi class=""></fa fa-chevron-upi></div>
</div>
<div class="">
detail_b <p class="" reprint_copystyle="" display:noneid=""></copyrightp>
<!--
<div class="bole" style="display:none">
<h2 class="bole_t clearfix"><span>伯乐推荐</span>
<label>一共有<em>{bolecount}</em>位博乐进行推荐</label>
</h2>
{bolecomment}
</div>
-->
<!-- style=""style=""-->
<h2 class="" >
praise <label id="" diggArticleId="" 6998140onclick="" ><btndigga();span id="">顶</btnDiggspan><em>14</em></label>
<label id="" buryonclick=""><btnburya();span id="" >踩</btnBuryspan><em>0</em></label>
</h2>
<div class="" tracking-addata-mod=""><popu_222a href="" >javascript:void(0); </a> </div>
<div class="" tracking-addata-mod=""> <popu_223a href="" >javascript:void(0); </a></div> <script type="">
text/javascript function btndigga() {
$(".tracking-ad[data-mod='popu_222'] a").click();
}
function btnburya() {
$(".tracking-ad[data-mod='popu_223'] a").click();
} $(function () {
if ($(".markdown_views").length > 0) {
if($("#fromjs").length==0)
{
$('pre.prettyprint code').each(function () {
var lines = $(this).text().split('\n').length;
var $numbering = $('<ul/>').addClass('pre-numbering').hide();
$(this).addClass('has-numbering').parent().append($numbering);
for (i = 1; i <= lines; i++) {
$numbering.append($('<li/>').text(i));
};
$numbering.fadeIn(1700);
});
}
}
else {
$("#article_content pre").each(function () {
var $this = $(this);
if ($this.attr("class") != undefined) {
if ($this.attr("class").indexOf("brush:") != -1) {
var lang = $this.attr("class").split(';')[0].split(':')[1];
$this.attr('name', 'code');
$this.attr('class', lang);
}
if ($this.attr("class")) {
$this.attr('name', 'code');
}
}
});
$('#article_content textarea[name=code]').each(function () {
var $this = $(this);
if ($this.attr("class").indexOf(":") != -1) {
$this.attr("class", $this.attr("class").split(':')[0]);
}
});
dp.SyntaxHighlighter.HighlightAll('code');
$('.highlighter').addClass('dp-highlighter');
if (!window.clipboardData) {
setTimeout("setCopyBtn()", 500);
} function __get_code_toolbar(snippet_id) {
return $("<span class='tracking-ad' data-mod='popu_167'><a href='https://code.csdn.net/snippets/"
+ snippet_id
+ "' target='_blank' title='在CODE上查看代码片' style='text-indent:0;'><img src='https://code.csdn.net/assets/CODE_ico.png' width=12 height=12 alt='在CODE上查看代码片' style='position:relative;top:1px;left:2px;'/></a></span>"
+ "<span class='tracking-ad' data-mod='popu_170'><a href='https://code.csdn.net/snippets/"
+ snippet_id
+ "/fork' target='_blank' title='派生到我的代码片' style='text-indent:0;'><img src='https://code.csdn.net/assets/ico_fork.svg' width=12 height=12 alt='派生到我的代码片' style='position:relative;top:2px;left:2px;'/></a></span>");
} $("[code_snippet_id]").each(function () {
__s_id = $(this).attr("code_snippet_id");
if (__s_id != null && __s_id != "" && __s_id != 0 && parseInt(__s_id) > 70020) {
__code_tool = __get_code_toolbar(__s_id);
$(this).prev().find(".tools").append(__code_tool);
}
}); $(".bar").show();
}
});
</script>
<div class="">
blog_share <!--<i class="fa fa-qq"></i><i class="fa fa-weixin"></i><i class="fa fa-weibo"></i><i class="fa fa-renren"></i><i class="fa fa-qq"></i><i class="fa fa-weixin"></i>
<i class="fa fa-weibo"></i><i class="fa fa-renren"></i>-->
<div class="" bdsharebuttonbox tracking-adstyle="" float: right;data-mod="">
popu_172 <a href="" #class="" bds_moredata-cmd="" morestyle=""></background-position:0 0 !important; background-image: url(http://bdimg.share.baidu.com/static/api/img/share/icons_0_16.png?v=d754dcc0.png) !importanta>
<a href="" #class="" bds_qzonedata-cmd="" qzonetitle="" 分享到QQ空间style=""></background-position:0 -52px !importanta>
<a href="" #class="" bds_tsinadata-cmd="" tsinatitle=""分享到新浪微博style=""></background-position:0 -104px !importanta>
<a href="" #class="" bds_tqqdata-cmd="" tqqtitle=""分享到腾讯微博style=""></background-position:0 -260px !importanta>
<a href="" #class="" bds_renrendata-cmd="" renrentitle=""分享到人人网style=""></background-position:0 -208px !importanta>
<a href="" #class="" bds_weixindata-cmd="" weixintitle=""分享到微信style="" ></background-position:0 -1612px !importanta>
</div>
<script>window._bd_share_config = { "common": { "bdSnsKey": {}, "bdText": "", "bdMini": "1", "bdMiniList": false, "bdPic": "", "bdStyle": "0", "bdSize": "16" }, "share": {} }; with (document) 0[(getElementsByTagName('head')[0] || body).appendChild(createElement('script')).src = 'http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion=' + ~(-new Date() / 36e5)];</script>
<!-- Baidu Button END -->
</div>
<div class="">
forward_back <div class=""><back fla href="" javascript:void(0);onclick=""><_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_shangyipian']);location.href='http://blog.csdn.net/huiwenjie168/article/details/6997817';span><i class=""></fa fa-arrow-lefti></span><em>关于Ireport的使用技巧</em></a></div><div class=""><forward fra href="" javascript:void(0);onclick=""><_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_xiayipian']);location.href='http://blog.csdn.net/huiwenjie168/article/details/7007357';em>如何使用Log4j</em><span><i class=""></fa fa-arrow-righti></span></a></div>
</div>
<div>
<script type="">
text/javascript /*博客内容页下方Banner2-728*90，创建于2014-7-3*/
var cpro_id = "u1607657";
</script>
<script type="" text/javascriptsrc=""></http://cpro.baidustatic.com/cpro/ui/c.jsscript>
</div>
<!--
{articleinsamecategory}
-->
<div class="" commentid="">
comment_form <div id="">
commentsbmitarear <h2 class="">发表评论</comment_th2>
<dl class="" publish_comment clearfixid="">
commentbox <dt><a href=""><http://my.csdn.net/img src=""></a></dt>
<dd>
<form action="" /huiwenjie168/comment/submit?id=6998140method="" postonsubmit="" return subform(this);id="">
commentform <textarea class="" publish_txtid=""></comment_contenttextarea>
<div class="">
publish clearfix
<div class=""><publish_li class=""></fa fa-code J_codei></div> <input type="" hiddenid="" comment_replyIdname="">
comment_replyId <input type="" hiddenid="" comment_userIdname="" comment_userIdvalue="">
<input type="" hiddenid="" commentIdname="" commentIdvalue=""> <a href="" javascript:void(0);class=""> 发表评论</publish_btna> <span id="" tip_commentstyle=""></color: Red; display: none;span> <div class="" comment-code-pop J_lang_listid="" lang_listcode=""><codea href="" #htmlstyle="" width:95px;class="">HTML/XML</long_namea><a href="" #objcstyle="" width:95px;class="">objective-c</long_namea><a href="" #delphistyle="" width:58px;class="">Delphi</zhong_namea><a href="" #rubyclass="">Ruby</zhong_namea><a href="">PHP</#phpa><a href="" #csharpclass="">C#</duan_namea><a style="" border-right: none;href="" #cppclass="">C++</duan_namea><a style="" border-bottom:none;width:95px;href="" #javascriptclass="">JavaScript</long_namea><a style="" border-bottom:none;width:95px;href="" #vbclass="">Visual Basic</long_namea><a style="" border-bottom:none;href="" #pythonclass="">Python</zhong_namea><a style="" border-bottom:none;href="" #javaclass="">Java</zhong_namea><a style="" border-bottom:none;href="" #cssclass="">CSS</duan_namea><a style="" border-bottom:none;href="" #sqlclass="">SQL</duan_namea><a style="" border:none;href="" #plainclass="">其它</duan_namea><span class=""></arrbspan></div>
</div>
</form>
</dd>
</dl>
</div>
<a name=""></commentsa>
<div class="" comment_listid=""></comment_listdiv>
<div style="">height:60px </div>
</div>
</div>
</div>
</div>
<div class="">
skin_right <div id="" skin_r_wrapclass="">
skin_r_wrap <div id="" skin_rclass=""><skin_ri id="" arrow_rclass=""></fa fa-arrow-righti>
<div class=""><messa href=""><http://my.csdn.net/huiwenjie168img src="" http://avatar.csdn.net/3/A/4/1_huiwenjie168.jpgalt="" imgclass=""></heada>
<p class="">huiwenjie168</mess_namep>
<div class="">
grade <p><span>等级：</span><img src=""></http://c.csdnimg.cn/jifen/images/xunzhang/jianzhang/blog5.pngp>
<p><span>排名：</span><span>第10068名</span></p>
</div>
<div class=""><blog_medala href=""></http://blog.csdn.net/experts/rule.htmla>
<div class=""></medal_cdiv>
<div class="">
attention <a href="" javascript:void(0);id=""><span_add_followi class=""></fa fa-plusi><span>加关注</span></a>
<a href="" javascript:void(0);onClick=""><window.open('http://msg.csdn.net/letters/model?receiver=huiwenjie168','_blank','height=350,width=700');_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_sixin'])i class=""></fa fa-envelope-oi><span>发私信</span></a>
</div>
<div class=""></contactdiv>
</div>
</div>
<div class="">
classify <!--
<dl class="classify_list js_list">
<dt>
<div class="js_column"><i class="fa fa-th"></i><a href="#" class="column">文章分类</a></div>
</dt>
</dl> <dl class="classify_list">
<dt><i class="fa fa-play-circle"></i><a href="/huiwenjie168/blog/course" class="column">我的课程</a></dt>
</dl>
--> <dl class="">
classify_list <div class="">
article_search <div class="">
article_search_c <form id="" frmSearchaction="" http://so.csdn.net/searchclass="" form_search csdn-tracking-statisticstarget="" _blankdata-mod="">
popu_306 <input type="" textid="" inputSearchplaceholder=""><文章搜索i class="" fa fa-searchid=""></btnSubmiti>
</form>
</div>
</div>
</dl>
<script type="">
text/javascript $(function () {
$("#btnSubmit").unbind("click");
$("#btnSubmit").click(function () {
search();
}); $("#frmSearch").submit(function () {
search();
return false;
}); function search()
{
if ($("#inputSearch").val() == "") {
alert("请录入搜索关键词！");
return false;
}
//var url = "http://so.csdn.net/so/search/s.do?q=" + encodeURIComponent($("#inputSearch").val()) + "&u=" + username + "&t=blog";
var url = "https://www.baidu.com/s?wd=" + encodeURIComponent($("#inputSearch").val()) + "%20site%3Ablog.csdn.net"
window.location.href = url;
}
});
</script> <dl class="">
classify_list <dt><i class=""></fa fa-file-texti><a href="" /huiwenjie168/blog/columnclass="">博客专栏</columna> </dt>
</dl> <dl class="">
classify_list js_list <dt>
<div class=""><js_column_wrapi class=""></fa fa-thi><span class="">文章分类</columnspan></div>
<ul id="" article_list0class="">
article_list <li><a href="" /huiwenjie168/article/category/2539973onclick="">java</_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_wenzhangfenlei']);a><span>（23）</span></li><li><a href="" /huiwenjie168/article/category/3103225onclick="">数据库</_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_wenzhangfenlei']);a><span>（4）</span></li><li><a href="" /huiwenjie168/article/category/3103229onclick="">javaScript</_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_wenzhangfenlei']);a><span>（5）</span></li><li><a href="" /huiwenjie168/article/category/3103255onclick="">jsp</_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_wenzhangfenlei']);a><span>（2）</span></li><li><a href="" /huiwenjie168/article/category/3103269onclick="">SSH</_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_wenzhangfenlei']);a><span>（7）</span></li><li><a href="" /huiwenjie168/article/category/3103273onclick="">其他</_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_wenzhangfenlei']);a><span>（10）</span></li><li><a href="" /huiwenjie168/article/category/3103293onclick="">Tomcat</_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_wenzhangfenlei']);a><span>（4）</span></li><li><a href="" /huiwenjie168/article/category/3103305onclick="">JQuery</_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_wenzhangfenlei']);a><span>（2）</span></li>
</ul>
</dt>
<dd style=""><display:nonea href="" #class=""><article_addi class=""></fa fa-plusi></a></dd>
</dl> <dl class="">
classify_list js_list <dt>
<div class=""><js_column_wrapi class=""></fa fa-calendari><span class="">文章存档</columnspan></div>
<ul id="" article_list1class="">
article_list
<li><a href="">2017年06月<//huiwenjie168/article/month/2017/06a><span>(1)</span></li> <li><a href="">2016年12月<//huiwenjie168/article/month/2016/12a><span>(1)</span></li> <li><a href="">2016年06月<//huiwenjie168/article/month/2016/06a><span>(3)</span></li> <li><a href="">2015年12月<//huiwenjie168/article/month/2015/12a><span>(1)</span></li> <li><a href="">2015年11月<//huiwenjie168/article/month/2015/11a><span>(1)</span></li> <li><a href="">2015年09月<//huiwenjie168/article/month/2015/09a><span>(1)</span></li> <li><a href="">2015年04月<//huiwenjie168/article/month/2015/04a><span>(1)</span></li> <li><a href="">2014年12月<//huiwenjie168/article/month/2014/12a><span>(1)</span></li> <li><a href="">2014年05月<//huiwenjie168/article/month/2014/05a><span>(7)</span></li> <li><a href="">2013年11月<//huiwenjie168/article/month/2013/11a><span>(1)</span></li> <li><a href="">2013年06月<//huiwenjie168/article/month/2013/06a><span>(3)</span></li> <li><a href="">2013年05月<//huiwenjie168/article/month/2013/05a><span>(1)</span></li> <li><a href="">2013年04月<//huiwenjie168/article/month/2013/04a><span>(1)</span></li> <li><a href="">2013年01月<//huiwenjie168/article/month/2013/01a><span>(4)</span></li> <li><a href="">2012年12月<//huiwenjie168/article/month/2012/12a><span>(1)</span></li> <li><a href="">2012年10月<//huiwenjie168/article/month/2012/10a><span>(1)</span></li> <li><a href="">2012年09月<//huiwenjie168/article/month/2012/09a><span>(1)</span></li> <li><a href="">2012年08月<//huiwenjie168/article/month/2012/08a><span>(1)</span></li> <li><a href="">2012年07月<//huiwenjie168/article/month/2012/07a><span>(2)</span></li> <li><a href="">2012年06月<//huiwenjie168/article/month/2012/06a><span>(1)</span></li> <li><a href="">2012年05月<//huiwenjie168/article/month/2012/05a><span>(7)</span></li> <li><a href="">2012年03月<//huiwenjie168/article/month/2012/03a><span>(1)</span></li> <li><a href="">2012年02月<//huiwenjie168/article/month/2012/02a><span>(11)</span></li> <li><a href="">2011年12月<//huiwenjie168/article/month/2011/12a><span>(4)</span></li> <li><a href="">2011年11月<//huiwenjie168/article/month/2011/11a><span>(16)</span></li> <li><a href="">2011年10月<//huiwenjie168/article/month/2011/10a><span>(4)</span></li> </ul>
</dt>
</dl> <dl class="">
classify_list js_list <dt>
<div class=""><js_column_wrapi class=""></fa fa-eyei><span class="">阅读排行</columnspan></div>
<ul class="">
article_list
<li><a href="">BigDecimal加减乘除运算<//huiwenjie168/article/details/6998140a><span>（139370）</span></li> <li><a href="">org.hibernate.exception.SQLGrammarException: could not execute query处理方式<//huiwenjie168/article/details/7017680a><span>（31657）</span></li> <li><a href="">Tomcat内存,并发数配置<//huiwenjie168/article/details/7019303a><span>（27150）</span></li> <li><a href="">spring加载hibernate映射文件的几种方式<//huiwenjie168/article/details/7013618a><span>（23033）</span></li> <li><a href="">c3p0、dbcp、tomcat jdbc pool 连接池配置简介及常用数据库的driverClass和驱动包<//huiwenjie168/article/details/8477967a><span>（18385）</span></li> <li><a href="">免装版tomcat注册成windows系统服务方法<//huiwenjie168/article/details/42267353a><span>（17917）</span></li> <li><a href="">java根据IP获取用户所在地<//huiwenjie168/article/details/16898619a><span>（17158）</span></li> <li><a href="">用iText给pdf添加水印图片<//huiwenjie168/article/details/7616983a><span>（16394）</span></li> <li><a href="">关于Ireport的使用技巧<//huiwenjie168/article/details/6997817a><span>（11246）</span></li> <li><a href="">PowerDesigner15.1创建模型及生成带注释sql操作手册<//huiwenjie168/article/details/7824029a><span>（11160）</span></li> </ul>
</dt>
</dl> <dl class="">
classify_list js_list <dt>
<div class=""><js_column_wrapi class=""></fa fa-commentsi><span class="">评论排行</columnspan></div>
<ul class="">
article_list
<li><a href="">用iText给pdf添加水印图片<//huiwenjie168/article/details/7616983a><span>（14）</span></li> <li><a href="">java获取新浪天气预报代码<//huiwenjie168/article/details/27332779a><span>（10）</span></li> <li><a href="">BigDecimal加减乘除运算<//huiwenjie168/article/details/6998140a><span>（9）</span></li> <li><a href="">java根据IP获取用户所在地<//huiwenjie168/article/details/16898619a><span>（6）</span></li> <li><a href="">验证身份证号方法<//huiwenjie168/article/details/42142339a><span>（3）</span></li> <li><a href="">java开发常用jar包<//huiwenjie168/article/details/7049481a><span>（3）</span></li> <li><a href="">java程序调用iReport生成的.jasper文件的方法<//huiwenjie168/article/details/7286963a><span>（3）</span></li> <li><a href="">java.lang.IllegalArgumentException: node to traverse cannot be null! 处理方法<//huiwenjie168/article/details/7019276a><span>（2）</span></li> <li><a href="">PowerDesigner15.1创建模型及生成带注释sql操作手册<//huiwenjie168/article/details/7824029a><span>（2）</span></li> <li><a href="">原来冒泡不是最牛的排序方法<//huiwenjie168/article/details/7252919a><span>（2）</span></li> </ul>
</dt>
</dl> <dl class="">
classify_list js_list <dt>
<div class=""><js_column_wrapi class=""></fa fa-list-oli><span class="">推荐文章</columnspan></div>
<ul class="">
article_list <ul>
<li><a href="" http://blog.csdn.net/blogdevteam/article/details/75086638target="">* CSDN日报20170713——《程序人生，终究是起承转合》</_blanka></li>
<li><a href=""
http://blog.csdn.net/phodal/article/details/74516182target="">* 探讨后端选型中不同语言及对应的Web框架</_blanka></li>
<li><a href=""http://blog.csdn.net/briblue/article/details/74616922target="">* 细说反射，Java 和 Android 开发者必须跨越的坎</_blanka></li>
<li><a href=""
http://blog.csdn.net/xiaopihaierletian/article/details/74688643target="">* 深度学习 | 反向传播与它的直观理解</_blanka></li>
<li><a href=""
http://blog.csdn.net/liyuanxiang1984/article/details/74611136target="">* ArcGIS 水文分析实战教程——雨量计算与流量统计</_blanka></li>
<li><a href=""
http://blog.csdn.net/broadview2006/article/details/74431515target="">* 每周荐书：Android、Keras、ES6（评论送书）</_blanka></li> </ul>
</ul>
</dt>
</dl> <dl class="">
classify_list js_list <dt>
<div class=""><js_column_wrapi class=""></fa fa-commentingi><span class="">最新评论</columnspan></div>
<ul class="">
article_list new_comment
<li>
<p><a href="">java获取新浪天气预报代码<//huiwenjie168/article/details/27332779a></p>
<p><a href="" /huiwenjie168class="">huiwenjie168</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>@qq_35476379:你能那到天气情况，图片还不好设置吗？http://www.17sucai....</i></p>
</li> <li>
<p><a href="">java获取新浪天气预报代码</a></p>
<p><a href="" /qq_35476379class="">qq_35476379</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>有个问题请教下，我看返回的数据中没有天气对应图片的数据哦，新浪天气获取不到天气图片的吗？</i></p>
</li> <li>
<p><a href="">org.hibernate.exception.SQLGrammarException: could not execute query处理方式<//huiwenjie168/article/details/7017680a></p>
<p><a href="" /yiwangxiblogclass="">yiwangxiblog</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>感谢分享</i></p>
</li> <li>
<p><a href="">java.lang.IllegalArgumentException: node to traverse cannot be null! 处理方法<//huiwenjie168/article/details/7019276a></p>
<p><a href="" /wangjinlong_class="">wangjinlong_</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>解决了，</i></p>
</li> <li>
<p><a href="">用iText给pdf添加水印图片<//huiwenjie168/article/details/7616983a></p>
<p><a href="" /u014335844class="">u014335844</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>图片本身有要求吗，格式方面</i></p>
</li> <li>
<p><a href="">spring+mybatis使用MapperScannerConfigurer引起的PropertyPlaceholderConfigurer无效问题处理方法<//huiwenjie168/article/details/51722290a></p>
<p><a href="" /a769901686class="">a769901686</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>我也试了，不行，也看不出来，上面两个的配置除了改了SqlSessionFactoryBean的id名...</i></p>
</li> <li>
<p><a href="">spring加载hibernate映射文件的几种方式<//huiwenjie168/article/details/7013618a></p>
<p><a href="" /foaicaiqingclass="">foaicaiqing</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>大神，谢谢了</i></p>
</li> <li>
<p><a href="">免装版tomcat注册成windows系统服务方法<//huiwenjie168/article/details/42267353a></p>
<p><a href="" /xiaoqingwa0214class="">xiaoqingwa0214</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>很有帮助</i></p>
</li> <li>
<p><a href="">BigDecimal加减乘除运算<//huiwenjie168/article/details/6998140a></p>
<p><a href="" /qq_18843045class="">qq_18843045</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>double处理是有问题的，2245.325试着保留2位小数位看看</i></p>
</li> <li>
<p><a href="">java根据IP获取用户所在地<//huiwenjie168/article/details/16898619a></p>
<p><a href="" /wanggangjiaclass="">wanggangjia</reply_namea><span>回复：</span></p>
<p class=""><reply_cem></em><i>挺不错 正如楼上所说 ip要用外网的才行</i></p>
</li> </ul>
</dt>
</dl> <!--
[startblogcolumn]
[startsearch]
<dl class="classify_list">
<div class="article_search">
<div class="article_search_c">
<form id="frmSearch" action="http://so.csdn.net/search" class="form_search csdn-tracking-statistics" target="_blank" data-mod="popu_306">
<input type="text" id="inputSearch" placeholder="文章搜索"><i class="fa fa-search" id="btnSubmit"></i>
</form>
</div>
</div>
</dl>
<script type="text/javascript"> $(function () {
$("#btnSubmit").unbind("click");
$("#btnSubmit").click(function () {
search();
}); $("#frmSearch").submit(function () {
search();
return false;
}); function search()
{
if ($("#inputSearch").val() == "") {
alert("请录入搜索关键词！");
return false;
}
//var url = "http://so.csdn.net/so/search/s.do?q=" + encodeURIComponent($("#inputSearch").val()) + "&u=" + username + "&t=blog";
var url = "https://www.baidu.com/s?wd=" + encodeURIComponent($("#inputSearch").val()) + "%20site%3Ablog.csdn.net"
window.location.href = url;
}
});
</script>
[endsearch] [startspecialcolumn]
<dl class="classify_list">
<dt><i class="fa fa-file-text"></i><a href="/huiwenjie168/blog/column" class="column">博客专栏</a> </dt>
</dl>
[endspecialcolumn] [startcategory]
<dl class="classify_list js_list">
<dt>
<div class="js_column_wrap"><i class="fa fa-th"></i><span class="column">文章分类</span></div>
<ul id="article_list0" class="article_list">
{articlecategorys}
</ul>
</dt>
<dd style="display:none"><a href="#" class="article_add"><i class="fa fa-plus"></i></a></dd>
</dl>
[endcategory] [startarchive]
<dl class="classify_list js_list">
<dt>
<div class="js_column_wrap"><i class="fa fa-calendar"></i><span class="column">文章存档</span></div>
<ul id="article_list1" class="article_list">
[startlist]
<li><a href="/{0}/article/month/{1}/{2}">{1}年{2}月</a><span>({3})</span></li>
[endlist]
</ul>
</dt>
</dl>
[endarchive]
[startviewcountarticles]
<dl class="classify_list js_list">
<dt>
<div class="js_column_wrap"><i class="fa fa-eye"></i><span class="column">阅读排行</span></div>
<ul class="article_list">
[startlist]
<li><a href="{columnarticleurl}">{columnarticletitle}</a><span>（{columnarticlecount}）</span></li>
[endlist]
</ul>
</dt>
</dl>
[endviewcountarticles]
[startcommentcountarticles]
<dl class="classify_list js_list">
<dt>
<div class="js_column_wrap"><i class="fa fa-comments"></i><span class="column">评论排行</span></div>
<ul class="article_list">
[startlist]
<li><a href="{columnarticleurl}">{columnarticletitle}</a><span>（{columnarticlecommentcount}）</span></li>
[endlist]
</ul>
</dt>
</dl>
[endcommentcountarticles]
[starthomepagearticles]
<dl class="classify_list js_list">
<dt>
<div class="js_column_wrap"><i class="fa fa-list-ol"></i><span class="column">推荐文章</span></div>
<ul class="article_list">
{cloumcontent}
</ul>
</dt>
</dl>
[endhomepagearticles]
[startnewcomments]
<dl class="classify_list js_list">
<dt>
<div class="js_column_wrap"><i class="fa fa-commenting"></i><span class="column">最新评论</span></div>
<ul class="article_list new_comment">
[startlist]
<li>
<p><a href="{articleurl}">BigDecimal加减乘除运算</a></p>
<p><a href="/{commentusername}" class="reply_name">{commentusername}</a><span>回复：</span></p>
<p class="reply_c"><em></em><i>{commentcontent}</i></p>
</li>
[endlist]
</ul>
</dt>
</dl>
[endnewcomments]
[startcustom]
<dl class="classify_list js_list">
<dt>
<div class="js_column_wrap"><i class="fa fa-cube"></i><span class="column">{columntitle}</span></div>
<ul class="article_list">
{columcontent}
</ul>
</dt>
</dl>
[endcustom]
[endblogcolumn]
--> <!--
<dl class="classify_list">
<dt class="rss"><i class="fa fa-rss"></i>
<span class="column">
<a href="http://blog.csdn.net/huiwenjie168/rss/list" class="column" onclick="_gaq.push(['_trackEvent','function', 'onclick', 'blog_articles_RSS'])">RSS订阅</a>
</span>
</dt>
</dl>
--> </div>
</div>
</div>
</div>
<div id="" skin_right_smallclass="">
skin_right_small <div class=""><skin_r_smalli id="" faNaviconclass=""></fa fa-naviconi>
<div class=""><head_smalla href=""><http://my.csdn.net/huiwenjie168img src="" http://avatar.csdn.net/3/A/4/1_huiwenjie168.jpgalt=""></imga></div>
<ul class="">
rSmallList <li class=""><small_articlei class=""></fa fa-file-texti><a href="" /huiwenjie168/blog/columnclass="">博客专栏</small_columna></li> <li class=""><small_article js_smallArticlei class=""></fa fa-thi><a href="" #class="">文章分类</small_columna></li> <li class=""><small_article js_smallArticlei class=""></fa fa-calendari><a href="" #class="">文章存档</small_columna></li> <li class=""><small_article js_smallArticlei class=""></fa fa-eyei><a href="" #class="">阅读排行</small_columna></li> <li class=""><small_article js_smallArticlei class=""></fa fa-commentsi><a href="" #class="">评论排行</small_columna></li> <li class=""><small_article js_smallArticlei class=""></fa fa-list-oli><a href="" #class="">推荐文章</small_columna></li> <li class=""><small_article js_smallArticlei class=""></fa fa-commentingi><a href="" #class="">最新评论</small_columna></li> <!--
[startblogcolumnsmall]
[startspecialcolumn]
<li class="small_article"><i class="fa fa-file-text"></i><a href="/huiwenjie168/blog/column" class="small_column">博客专栏</a></li>
[endspecialcolumn]
[startcategory]
<li class="small_article js_smallArticle"><i class="fa fa-th"></i><a href="#" class="small_column">文章分类</a></li>
[endcategory]
[startarchive]
<li class="small_article js_smallArticle"><i class="fa fa-calendar"></i><a href="#" class="small_column">文章存档</a></li>
[endarchive]
[startviewcountarticles]
<li class="small_article js_smallArticle"><i class="fa fa-eye"></i><a href="#" class="small_column">阅读排行</a></li>
[endviewcountarticles]
[startcommentcountarticles]
<li class="small_article js_smallArticle"><i class="fa fa-comments"></i><a href="#" class="small_column">评论排行</a></li>
[endcommentcountarticles]
[starthomepagearticles]
<li class="small_article js_smallArticle"><i class="fa fa-list-ol"></i><a href="#" class="small_column">推荐文章</a></li>
[endhomepagearticles]
[startnewcomments]
<li class="small_article js_smallArticle"><i class="fa fa-commenting"></i><a href="#" class="small_column">最新评论</a></li>
[endnewcomments]
[startcustom]
<li class="small_article js_smallArticle"><i class="fa fa-cube"></i><a href="#" class="small_column">{columntitle}</a></li>
[endcustom]
[endblogcolumnsmall]
-->
</ul>
</div>
</div> <div id=""></maskdiv>
<script type="" text/javascriptsrc=""></http://static.blog.csdn.net/skin/skin2-template/js/apps/accordion.jsscript> <script type="" text/javascriptsrc=""></http://static.blog.csdn.net/skin/skin2-template/js/apps/jquery.mousewheel.jsscript>
<script type="" text/javascriptsrc=""></http://static.blog.csdn.net/skin/skin2-template/js/apps/jquery.rollbar.min.jsscript> <script type="" text/javascriptsrc=""></http://static.blog.csdn.net/skin/skin2-template/js/apps/transition.jsscript>
<script id="" noticeScripttype="" text/javascriptcharset="" utf-8btnId="" header_notice_numwrapId="" note1count="" 5subCount="" 5src=""></http://c.csdnimg.cn/public/common/toolbar/js/notify.jsscript>
<!--script( type="text/javascript" src="http://csdnimg.cn/pubfooter/js/publib_footer.js" )-->
<!--script( type="text/javascript" src="http://static.csdn.net/public/common/toolbar/js/toolbar.js" )-->
<script id="" csdn-toolbar-idbtnId="" header_notice_numwrapId="" note1count="" 5subCount="" 5type="" text/javascriptsrc=""></http://c.csdnimg.cn/public/common/toolbar/js/toolbar.jsscript> <div id="" pop_winstyle="">
display:none ;position: absolute; z-index: 10000; border: 1px solid rgb(220, 220, 220); top: 222.5px; left: 630px; opacity: 1; background: none 0px 0px repeat scroll rgb(255, 255, 255);
</div>
<div id="">
report_dialog </div> <div id=""></popup_maskdiv>
<style type="">
text/css #popup_mask
{
position: absolute;
width: 100%;
height: 100%;
background: #000;
z-index: 9999;
left: 0px;
top: 0px;
opacity: 0.3;
filter: alpha(opacity=30);
display: none;
} .skin_list dl dd div ol {
margin-left:15px;
} .skin_list dl dd div ol li {
display:list-item;list-style-type:decimal;margin-left:15px;
} </style> <div id="" a52b5334dstyle="">
width: 1px; height: 1px; display: none; <script id=""></adJs52b5334script>
<script>document.getElementById("adJs52b5334").src = "http://ads.csdn.net/js/opt/52b5334.js?t=" + Math.random();</script>
</div> <!-- 广告位开始 -->
<ins data-revive-zoneid="" 72data-revive-id=""></8c38e720de1c90a6f6ff52f3f89c4d57ins>
<!-- 广告位结束 --> <link rel="" stylesheethref="" />
http://static.blog.csdn.net/css/blog_code.css <script type="" text/javascriptsrc=""></http://static.blog.csdn.net/scripts/saveToCode.jsscript>
<script type="" text/javascriptsrc=""//csdnimg.cn/rabbit/tracking-ad/main.js?75eacd8></script> </body>
</html>
<script language=javascript" type="" text/javascriptsrc=""></http://ads.csdn.net/js/async_new.jsscript> <script type="">
text/javascript var fromjs=$("#fromjs");
if(fromjs.length>0)
{
$("#fromjs .markdown_views pre").addClass("prettyprint");
prettyPrint(); $('pre.prettyprint code').each(function () {
var lines = $(this).text().split('\n').length;
var $numbering = $('<ul/>').addClass('pre-numbering').hide();
$(this).addClass('has-numbering').parent().append($numbering);
for (i = 1; i <= lines; i++) {
$numbering.append($('<li/>').text(i));
};
$numbering.fadeIn(1700);
}); $('.pre-numbering li').css("color","#999");
} $(function(){
setTimeout(function(){
$(".math").each(function(index,value){$(this).find("span").last().css("color","#fff"); })
},500); }); </script>
BigDecimal加减乘除运算（转）的更多相关文章
- BigDecimal加减乘除运算
java.math.BigDecimal.BigDecimal一共有4个够造方法,让我先来看看其中的两种用法: 第一种:BigDecimal(double val)Translates a doubl ...
- Java BigDecimal 加减乘除运算
加法:add 减法:subtract 乘法:multiply 除法:divide BigDecimal bignum1 = new BigDecimal("10"); BigDec ...
- BigDecimal的运算——加减乘除
BigDecimal的运算--加减乘除 1.初始化(尽量用字符串的形式初始化) BigDecimal num12 = new BigDecimal("0.005"); BigDec ...
- 精确的double加减乘除运算工具类
import java.math.BigDecimal; /** * 精确的double加减乘除运算 * @author cyf * */ public class DoubleUtil { /** ...
- BigDecimal加减乘除及setScale的用法小结
Bigdecimal初始化: BigDecimal num = new BigDecimal(2.225667);//这种写法不允许,会造成精度损失. BigDecimal num = new Big ...
- Java中的Bigdecimal类型运算
Java中的Bigdecimal类型运算 双精度浮点型变量double可以处理16位有效数.在实际应用中,需要对更大或者更小的数进行运算和处理.Java在java.math包中提 供的API类BigD ...
- BigDecimal除法运算出现java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result的解决办法
BigDecimal除法运算出现java.lang.ArithmeticException: Non-terminating decimal expansion; no exact represent ...
- 新浪面试题：只允许使用++操作符实现加减乘除运算(c语言版)
//假定a,b都是正整数,只允许使用++而不使用-,--,*,/操作符的情况下实现加减乘除运算 //使用++实现加法: int jiafa(int a,int b){ for (int i=0;i&l ...
- java BigDecimal实现精确加减乘除运算
java.math.BigDecimal.BigDecimal一共有4个够造方法,让我先来看看其中的两种用法: 第一种:BigDecimal(double val)Translates a doubl ...
随机推荐
- (二分搜索)Can you solve this equation? -- hdu -- 2199
链接: http://acm.hdu.edu.cn/showproblem.php?pid=2199 Time Limit: 2000/1000 MS (Java/Others) Memory ...
- [label][responsive-web-design]网页响应测试各种尺寸的工具
因为现在各种各样的尺寸上网设备 ,所以我们现在的网页设计都必须要兼容到各种尺寸的屏幕,必须测试各个 size下面的页面布局与排版. 一个开发人员是不可能拥有各种设备来进行测试,那么有没有什么便捷的工具 ...
- 关于easyui展示慢的Debug
同事开发的软件系统采用Easyui做的前台界面,当业务变得比较复杂之后,展示效果就变得很慢,于是我开始了原因的排查,现在已经找到了具体的原因,所以拿出来与大家一起分享调试过程. 既然调试的是前端,那么 ...
- cesium编程入门(六)添加 3D Tiles，并调整位置，贴地
添加 3D Tiles,并调整位置 3D Tiles 是什么 3DTiles数据集是cesium小组AnalyticlGraphics与2016年3月定义的一种数据集,3DTiles数据集以分块.分级 ...
- 如何使用jQuery实现根据不同IP显示不同的内容
一些SEM的投放页会针对不同地域做针对性的内容推广,下面我把实现方法分享出来. 一.引用新浪提供的IP查询的js库 <script src="http://int.dpool.sina ...
- 数据库路由中间件MyCat - 源代码篇（4）
此文已由作者易国强授权网易云社区发布. 欢迎访问网易云社区,了解更多网易技术产品运营经验. 2. 前端连接建立与认证 Title:MySql连接建立以及认证过程client->MySql:1.T ...
- winform textbox控件keydown、keypress、keyup简单介绍
1.执行先后顺序: keydown-->keypress-->keyup 2.按键相关操作: 1)keydown和keyup参数类型KeyEventArgs(提供了KeyCode)实现形式 ...
- ceph pg_num 数值计算
通常在创建pool之前,需要覆盖默认的pg_num,官方推荐: 若少于5个OSD, 设置pg_num为128. 5~10个OSD,设置pg_num为512. 10~50个OSD,设置pg_num为40 ...
- LOJ#6360. 复燃「恋之埋火」（最小圆覆盖+高斯消元）
题面 传送门 题解 不难发现最小圆覆盖的随机增量法复杂度还是正确的 所以现在唯一的问题就是给定若干个点如何求一个\(m\)维的圆 其实就是这一题 //minamoto #include<bits ...
- BZOJ2961: 共点圆（CDQ分治+凸包）
题面 传送门 题解 这题解法真是多啊--据说可以圆反演转化为动态插入半平面并判断给定点是否在半平面交中,或者化一下改成给定点判断是否所有点都在某一个半平面内-- 鉴于圆反演我也不会,这里讲一下直接推的 ...