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Java example program to round double to 2 decimal places

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instanceof java

Posts: 576
Nickname: instanceof
Registered: Jan, 2015

instanceof java is a java related one.
Java example program to round double to 2 decimal places Posted: Apr 23, 2017 6:46 AM
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Original Post: Java example program to round double to 2 decimal places
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  • To round the decimal number in java we have DecimalFormat class in java.
  • By using DecimalFormat class format() method we can round double or float number to N decimal places.
  • Lets see a java program on how to round double to 2 decimal places.



 Java Program to round double number to 2 / 3 decimal places.


  1. package com.javarounddecimal;
  2. import java.text.DecimalFormat;
  3.  
  4. public class RoundDecimal {
  5.     /**
  6.      * java round double to 2 decimal places
  7.      * @author www.instanceofjava.com
  8.      */
  9.     public static void main(String[] args) {
  10.         
  11.         double number = 12.3712377;
  12.         DecimalFormat df1 = new DecimalFormat("#.##");
  13.         System.out.println(number + " is rounded to: " + df1.format(number));
  14.          
  15.         DecimalFormat df2 = new DecimalFormat("#.###");
  16.         System.out.println(number + " is rounded to: " + df2.format(number));
  17.          
  18.         number = 12.388654;
  19.         
  20.         DecimalFormat df3 = new DecimalFormat("#.##");
  21.         System.out.println(number + " is rounded to: " + df3.format(number));
  22.        
  23.         
  24.         DecimalFormat df4 = new DecimalFormat("#.###");
  25.         System.out.println(number + " is rounded to: " + df4.format(number));
  26.  
  27.     }
  28.  
  29. }
 Output:


  1. 12.3712377 is rounded to: 12.37
  2. 12.3712377 is rounded to: 12.371
  3. 12.388654 is rounded to: 12.39
  4. 12.388654 is rounded to: 12.389

  Java Program to round float number to 2 / 3 decimal places.


java round float to 2 decimal places




Output:

  1. 12.371238 is rounded to: 12.37
  2. 12.371238 is rounded to: 12.371
  3. 12.388654 is rounded to: 12.39
  4. 12.388654 is rounded to: 12.389

Read: Java example program to round double to 2 decimal places

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