Double decimal formatting in Java

Question

I'm having trouble formatting decimal places of two. If I have a double value, for example. 4.0, how do I format decimal places so that it is 4.00 instead?

Answer 1

One way to use NumberFormat .

NumberFormat formatter = new DecimalFormat("#0.00"); System.out.println(formatter.format(4.0)); 

Output:

4.00

Answer 2

With Java 8, you can use the format .. method: -

 System.out.format("%.2f", 4.0); // OR System.out.printf("%.2f", 4.0); 

• f used for the value floating .
• 2 after the decimal place, the number of decimal places after .

For most versions of Java, you can use DecimalFormat : -

  DecimalFormat formatter = new DecimalFormat("#0.00"); double d = 4.0; System.out.println(formatter.format(d)); 

Answer 3

Use String.format :

String.format("%.2f", 4.52135);

Answer 4

Using String.format, you can do this:

 double price = 52000; String.format("$%,.2f", price); 

Notice the comma that distinguishes it from @Vincent's answer

Output:

$52,000.00

A good resource for formatting is the official java page on the topic.

Answer 5

You can always use the static method printf from System.out - you must implement the appropriate formatter; this saves a ton of space in which you need other examples.

Example:

 System.out.format("%.4f %n", 4.0); System.out.printf("%.2f %n", 4.0); 

It saves a ton of space, which is a pretty big bonus, however, I am of the opinion that this example is much more manageable than any other answer, especially since most programmers know the printf function from C (Java changes the function / method a bit).

Answer 6

 new DecimalFormat("#0.00").format(4.0d); 

Answer 7

 double d = 4.0; DecimalFormat nf = DecimalFormat.getInstance(Locale.ENGLISH); System.out.println(nf.format("#.##")); 

Answer 8

An alternative method is the setMinimumFractionDigits method of the setMinimumFractionDigits class.

Here you basically specify how many numbers you want to display after the decimal point.

So entering 4.0 will produce 4.00 if your indicated quantity is 2.

But if your Double tab contains more than the specified amount, it takes the specified minimum amount, then adds another digit rounded up / down

For example, 4.15465454 with a minimum of 2 will produce 4.155

 NumberFormat nf = NumberFormat.getInstance(); nf.setMinimumFractionDigits(2); Double myVal = 4.15465454; System.out.println(nf.format(myVal)); 

Try it online

Answer 9

It works 100%.

 import java.text.DecimalFormat; public class Formatting { public static void main(String[] args) { double value = 22.2323242434342; // or value = Math.round(value*100) / 100.0; System.out.println("this is before formatting: "+value); DecimalFormat df = new DecimalFormat("####0.00"); System.out.println("Value: " + df.format(value)); } } 

Answer 10

There are many ways to do this. Those are given below:

Suppose your original number is listed below:

  double number = 2354548.235; 

Using NumberFormat:

 NumberFormat formatter = new DecimalFormat("#0.00"); System.out.println(formatter.format(number)); 

Using String.format:

 System.out.println(String.format("%,.2f", number)); 

Using DecimalFormat and pattern:

 NumberFormat nf = DecimalFormat.getInstance(Locale.ENGLISH); DecimalFormat decimalFormatter = (DecimalFormat) nf; decimalFormatter.applyPattern("#,###,###.##"); String fString = decimalFormatter.format(number); System.out.println(fString); 

Using DecimalFormat and Template

 DecimalFormat decimalFormat = new DecimalFormat("############.##"); BigDecimal formattedOutput = new BigDecimal(decimalFormat.format(number)); System.out.println(formattedOutput); 

In all cases, the output will be: 2354548.23

Note :

During rounding, you can add RoundingMode to your formatter. Here are a few rounding options below:

  decimalFormat.setRoundingMode(RoundingMode.CEILING); decimalFormat.setRoundingMode(RoundingMode.FLOOR); decimalFormat.setRoundingMode(RoundingMode.HALF_DOWN); decimalFormat.setRoundingMode(RoundingMode.HALF_UP); decimalFormat.setRoundingMode(RoundingMode.UP); 

Here is the import :

 import java.math.BigDecimal; import java.math.RoundingMode; import java.text.DecimalFormat; import java.text.NumberFormat; import java.util.Locale; 

Answer 11

You can use any of the following methods

1. If you are using java.text.DecimalFormat

    DecimalFormat decimalFormat = NumberFormat.getCurrencyInstance(); decimalFormat.setMinimumFractionDigits(2); System.out.println(decimalFormat.format(4.0)); 

   OR

    DecimalFormat decimalFormat = new DecimalFormat("#0.00"); System.out.println(decimalFormat.format(4.0)); 

2. If you want to convert it to a simple string format

    System.out.println(String.format("%.2f", 4.0)); 

All code above will print 4.00

Answer 12

The first import of NumberFormat . Then add the following:

 NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance(); 

This will give you two decimal places and mark the dollar sign if it deals with currency.

 import java.text.NumberFormat; public class Payroll { /** * @param args the command line arguments */ public static void main(String[] args) { int hoursWorked = 80; double hourlyPay = 15.52; double grossPay = hoursWorked * hourlyPay; NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance(); System.out.println("Your gross pay is " + currencyFormatter.format(grossPay)); } } 

Answer 13

You can do it as follows:

 double d = 4.0; DecimalFormat df = new DecimalFormat("#.##"); System.out.print(df.format(d)); 

Answer 14

I know this is an old topic, but if you really like this period instead of a comma, just save your result as X, 00 in String, and then just just change it to a period to get x.00

The easiest way is to simply replace it.

 String var = "X,00"; String newVar = var.replace(",","."); 

The conclusion will be X.00 , which you need. Also, to make it easy, you can do it all on one and save it in a double variable:

 Double var = Double.parseDouble(("X,00").replace(",","."); 

I know this answer is not useful right now, but maybe someone who is checking this forum will be looking for a quick solution like this.