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

我们如何在 Java 中做到这一点?

How can we do this in Java?

推荐答案

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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