Home > Java > JavaBase > body text

How to make double type data retain two decimal places in java

王林
Release: 2019-11-27 09:46:13
Original
15397 people have browsed it

How to make double type data retain two decimal places in java

Method 1: Keep two decimal places

DecimalFormat df = new DecimalFormat("#.00");   
 
double d1 = 1.23456  
double d2 = 2.0;
double d3 = 0.0;
 
System.out.println(df.format(d1),df.format(d2),df.format(d3));
Copy after login

Output result:

1.23  2.00  0.00
Copy after login

More java related video tutorial recommendations: java teaching video

Method 2: Keep two decimal places and round

Example 1:

public class TwoDecimal {
public static void main(String[] args) {
double f = 23.456;
BigDecimal bigDecimal = new BigDecimal(f);
//这里的 2 就是你要保留几位小数。
double f1 = bigDecimal.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
System.out.println("保留两位小数 : " + f1);
}
}
Copy after login

Output result:

保留两位小数 : 23.46
Copy after login

Example 2:

public class qq {
public static void main(String[] args) {
double i = 23.546;
NumberFormat nf = NumberFormat.getNumberInstance();
// 2是显示的小数点后的显示的最多位,显示的最后位是舍入的
nf.setMaximumFractionDigits(2);
String result = nf.format(i);
System.out.print("结果是:"+result);
}
}
Copy after login

Output result:

结果是 :23.55
Copy after login

Recommended java article tutorial: java quick start

The above is the detailed content of How to make double type data retain two decimal places in java. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template