How to print a float with 2 decimal places in Java?

Question

Can I do it with System.out.print?

Pemberton

Answer 1

You can use the printf method, like so:

System.out.printf("%.2f", val);

In short, the %.2f syntax tells Java to return your variable (val) with 2 decimal places (.2) in decimal representation of a floating-point number (f) from the start of the format specifier (%).

There are other conversion characters you can use besides f:

• d: decimal integer
• o: octal integer
• e: floating-point in scientific notation

Clad

Please be carefull as String.format depend on your current Local configuration, you may not get a dot as a separator. Prefer using String.format(java.util.Locale.US,"%.2f", val); – Squadron

@gomino Why not Locale.FRANCE? – Formalism

@Formalism in France the decimal separator is a comma and not a dot. – Squadron

@gomino Exactly. So why would you put dots in numbers for French users? – Formalism

I added this comment as a reminder to warn people who expect to always have a dot as a separator. – Squadron

@gomino That makes sense, but I think to "prefer" hard-coding Locale.US goes too far. If you need to hard-code a "neutral" locale for case-folding, number rendering, etc., specify Locale.ROOT. This would be appropriate for text that will be consumed by another program, rather than rendered for human users. For text presented to a user, honor their locale, whether they specified it explicitly or it's the default. – Formalism

how can I store the result "%.2f",floatNumber in a variable – Piggott

Answer 2

You can use DecimalFormat. One way to use it:

DecimalFormat df = new DecimalFormat();
df.setMaximumFractionDigits(2);
System.out.println(df.format(decimalNumber));

Another one is to construct it using the #.## format.

I find all formatting options less readable than calling the formatting methods, but that's a matter of preference.

Piling

What happened with the System.out.printf("%.2f", value) syntax? Is it still around? – Clad

it is. it's still an option - you can undelete your answer ;) – Piling

Looks like it's my option, as I don't know how to use DecimalFormat yet :) Thanks! – Pemberton

I haven't done extensive Java work in a while, and when I kept seeing DecimalFormat answers I immediately had thought I was wrong, but thank you for clarifying that. – Clad

how can i return float value from this value like :float roundofDecimal(float dd){ DecimalFormat df = new DecimalFormat(); df.setMaximumFractionDigits(2); System.out.println(df.format(dd)); return df.format(dd); } – Olvan

This is a more useful answer to me than stuff around System.out since I'm not dumping my output to the terminal, but rather in to a GUI. Thank you +1 vote from me. – Kreg

add df.setMinimumFractionDigits(2); to force two digits – Suomi

Answer 3

I would suggest using String.format() if you need the value as a String in your code.

For example, you can use String.format() in the following way:

float myFloat = 2.001f;

String formattedString = String.format("%.02f", myFloat);

Snowshoe

"%.02f" and "%.2f" is same thing – Charlottcharlotta

Answer 4

double d = 1.234567;
DecimalFormat df = new DecimalFormat("#.##");
System.out.print(df.format(d));

Moral

Hi Kevin, if if enter 10.0000, i am getting 10 only. If i want to display 10.00 then how can i do? – Altostratus

@Altostratus use DecimalFormat df = new DecimalFormat("0.00"); – Stroller

Answer 5

float f = 102.236569f; 
DecimalFormat decimalFormat = new DecimalFormat("#.##");
float twoDigitsF = Float.valueOf(decimalFormat.format(f)); // output is 102.24

Skilled

Depending on the locale you might get a comma. If you want a dot separator, use this: DecimalFormat("#.##", DecimalFormatSymbols(Locale.US)) – Starve

Answer 6

You may use this quick codes below that changed itself at the end. Add how many zeros as refers to after the point

float y1 = 0.123456789;
DecimalFormat df = new DecimalFormat("#.00");  
y1 = Float.valueOf(df.format(y1));

The variable y1 was equals to 0.123456789 before. After the code it turns into 0.12 only.

Crier

It doesn't display 0 before the point. It should be DecimalFormat df = new DecimalFormat("0.00"); – Hanger

For sure! DecimalFormat("0.00") will work, too! Great spot. – Crier

Answer 7

float floatValue=22.34555f;
System.out.print(String.format("%.2f", floatValue));

Output is 22.35. If you need 3 decimal points change it to "%.3f".

Buckbuckaroo

Answer 8

Many people have mentioned DecimalFormat. But you can also use printf if you have a recent version of Java:

System.out.printf("%1.2f", 3.14159D);

See the docs on the Formatter for more information about the printf format string.

Carrageen

Answer 9

A simple trick is to generate a shorter version of your variable by multiplying it with e.g. 100, rounding it and dividing it by 100.0 again. This way you generate a variable, with 2 decimal places:

double new_variable = Math.round(old_variable*100) / 100.0;

This "cheap trick" was always good enough for me, and works in any language (I am not a Java person, just learning it).

Weslee

This is wrong, many numbers will be repeating numbers in float representation after you divide by 100. Hence not two decimal places. – Recitative

Answer 10

To print a float up to 2 decimal places in Java:

    float f = (float)11/3;
    System.out.print(String.format("%.2f",f));

OUTPUT: 3.67

> use %.3f for up to three decimal places.

Unawares

Answer 11

Look at DecimalFormat

Here is an example from the tutorial:

  DecimalFormat myFormatter = new DecimalFormat(pattern);
  String output = myFormatter.format(value);
  System.out.println(value + "  " + pattern + "  " + output);

If you choose a pattern like "###.##", you will get two decimal places, and I think that the values are rounded up. You will want to look at the link to get the exact format you want (e.g., whether you want trailing zeros)

Longshore

Answer 12

Below is code how you can display an output of float data with 2 decimal places in Java:

float ratingValue = 52.98929821f; 
DecimalFormat decimalFormat = new DecimalFormat("#.##");
float twoDigitsFR = Float.valueOf(decimalFormat.format(ratingValue)); // output is 52.98

Heartstrings

Answer 13

One issue that had me for an hour or more, on DecimalFormat- It handles double and float inputs differently. Even change of RoundingMode did not help. I am no expert but thought it may help someone like me. Ended up using Math.round instead. See below:

    DecimalFormat df = new DecimalFormat("#.##");
    double d = 0.7750;
    System.out.println(" Double 0.7750 -> " +Double.valueOf(df.format(d)));
    float f = 0.7750f;
    System.out.println(" Float 0.7750f -> "+Float.valueOf(df.format(f)));
    // change the RoundingMode
    df.setRoundingMode(RoundingMode.HALF_UP);
    System.out.println(" Rounding Up Double 0.7750 -> " +Double.valueOf(df.format(d)));
    System.out.println(" Rounding Up Float 0.7750f -> " +Float.valueOf(df.format(f)));

Output:

Double 0.7750 -> 0.78
Float 0.7750f -> 0.77

Rounding Up Double 0.7750 -> 0.78
Rounding Up Float 0.7750f -> 0.77

Conner

Answer 14

OK - str to float.

package test;

import java.text.DecimalFormat;

public class TestPtz {
  public static void main(String[] args) {
    String preset0 = "0.09,0.20,0.09,0.07";
    String[] thisto = preset0.split(",");    
    float a = (Float.valueOf(thisto[0])).floatValue();
    System.out.println("[Original]: " + a);   
    a = (float) (a + 0.01);

    // Part 1 - for display / debug
    System.out.printf("[Local]: %.2f \n", a);
    // Part 2 - when value requires to be send as it is
    DecimalFormat df = new DecimalFormat();
    df.setMinimumFractionDigits(2);
    df.setMaximumFractionDigits(2);
    System.out.println("[Remote]: " + df.format(a));

  }
}

Output:

run:
[Original]: 0.09
[Local]: 0.10 
[Remote]: 0.10
BUILD SUCCESSFUL (total time: 0 seconds)

Materialize

Answer 15

public String getDecimalNumber(String number) {
        Double d=Double.parseDouble(number);
        return String.format("%.5f", d);
}

Take care of NumberFormatException as well

Surname

Answer 16

small simple program for demonstration:

import java.io.*;
import java.util.Scanner;

public class twovalues {

    public static void main(String args[]) {

        float a,b;
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter Values For Calculation");

        a=sc.nextFloat();
        b=sc.nextFloat();

        float c=a/b;
        System.out.printf("%.2f",c);
    }
}

Catechumen

Answer 17

Just do String str = System.out.printf("%.2f", val).replace(",", "."); if you want to ensure that independently of the Locale of the user, you will always get / display a "." as decimal separator. This is a must if you don't want to make your program crash if you later do some kind of conversion like float f = Float.parseFloat(str);

Sandysandye

Answer 18

Try this:-

private static String getDecimalFormat(double value) {

    String getValue = String.valueOf(value).split("[.]")[1];

      if (getValue.length() == 1) {
          return String.valueOf(value).split("[.]")[0] +
                "."+ getValue.substring(0, 1) + 
                String.format("%0"+1+"d", 0);
       } else {
          return String.valueOf(value).split("[.]")[0]
            +"." + getValue.substring(0, 2);
      }


 }

Affective

For more Details:- makecodesimpleandeasy.blogspot.com/2019/08/… – Affective

Answer 19

you can simply use this code for formatting decimal precission.

    double n = Math.PI;
    DecimalFormat dcf = new DecimalFormat("#.##");
    float  f = Float.parseFloat(dcf.format(n));   // float value
    double d = Double.parseDouble(dcf.format(n)); // double value
    String number = dcf.format(n);                // String value

Aloin