BlogJava-会漂的石头-最新评论http://www.blogjava.net/caoqingsong/CommentsRSS.aspxzh-cnThu, 31 Aug 2006 03:35:00 GMTThu, 31 Aug 2006 03:35:00 GMTcnblogsre: java中浮点数的计算http://www.blogjava.net/caoqingsong/archive/2006/09/04/66808.html#67662永远的helloworld永远的helloworldMon, 04 Sep 2006 12:03:00 GMThttp://www.blogjava.net/caoqingsong/archive/2006/09/04/66808.html#67662
又看了一下Double的代码，也许和Double.toString方法的
FloatingDecimal(d).toJavaFormatString()有关系
猜测大概是2.3999999999999999超出了输出的精度所以被截取的原因吧


]]>re: java中浮点数的计算http://www.blogjava.net/caoqingsong/archive/2006/09/04/66808.html#67563曹青松曹青松Mon, 04 Sep 2006 05:14:00 GMThttp://www.blogjava.net/caoqingsong/archive/2006/09/04/66808.html#67563

曹青松 2006-09-04 13:14 发表评论
]]>re: java中浮点数的计算http://www.blogjava.net/caoqingsong/archive/2006/09/01/66808.html#67167永远的helloworld永远的helloworldFri, 01 Sep 2006 09:19:00 GMThttp://www.blogjava.net/caoqingsong/archive/2006/09/01/66808.html#67167
那么下面的输出是为什么？
double d = 2.4;
System.out.println(d);//输出2.4，却不是2.3999999999999999呢？

]]>re: java中浮点数的计算http://www.blogjava.net/caoqingsong/archive/2006/09/01/66808.html#67165永远的helloworld永远的helloworldFri, 01 Sep 2006 09:17:00 GMThttp://www.blogjava.net/caoqingsong/archive/2006/09/01/66808.html#67165public double round(double value){
double diff = 1E-10;
return Math.round(value*100+diff)/100.0;
}

另外，想请教一下，为什么下面的输出不同？
System.out.println(3.3-2.4);//输出0.8999999999999999
double c = 0.9;
System.out.println(c);//输出0.9

]]>re: 基于J2EE轻量级架构的多层应用的研究http://www.blogjava.net/caoqingsong/archive/2006/06/16/53158.html#53253googlegoogleFri, 16 Jun 2006 05:24:00 GMThttp://www.blogjava.net/caoqingsong/archive/2006/06/16/53158.html#53253

google 2006-06-16 13:24 发表评论
]]>re: 基于J2EE轻量级架构的多层应用的研究http://www.blogjava.net/caoqingsong/archive/2006/06/16/53158.html#53197寒晴天寒晴天Fri, 16 Jun 2006 03:42:00 GMThttp://www.blogjava.net/caoqingsong/archive/2006/06/16/53158.html#53197

寒晴天 2006-06-16 11:42 发表评论
]]>re: 基于J2EE轻量级架构的多层应用的研究http://www.blogjava.net/caoqingsong/archive/2006/06/16/53158.html#53182无无Fri, 16 Jun 2006 02:43:00 GMThttp://www.blogjava.net/caoqingsong/archive/2006/06/16/53158.html#53182学习一下

无 2006-06-16 10:43 发表评论
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