如何在JSP / Java中从double获取整数和小数部分？ [英] How do I get whole and fractional parts from double in JSP/Java?

问题描述

如何在JSP / Java中从double获取整数和小数部分？如果值是3.25那么我想得到 fractional = .25 ，整数= 3

How do I get whole and fractional parts from double in JSP/Java ? If the value is 3.25 then I want to get fractional =.25, whole = 3

我们如何用Java做到这一点？

How can we do this in Java?

推荐答案

如果您使用了Google，Google会帮助您正确的术语来搜索从双java中获取小数和整个部分

Google would help you if you used the right terms to search "get fractional and whole part out from double java"

http://www.java2s.com/Code/Java/Data-Type/Obtainingtheintegerandfractionalparts.htm

double num;
long iPart;
double fPart;

// Get user input
num = 2.3d;
iPart = (long) num;
fPart = num - iPart;
System.out.println("Integer part = " + iPart);
System.out.println("Fractional part = " + fPart);

输出：

Integer part = 2
Fractional part = 0.2999999999999998

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