Print Doubles to two decimal places?

When I do calculations on my double numbers and then print them on screen I get a string of digits after the decimal point. Can anyone give me the code as to how I use the DecimalFormat class to make these digits print to 2 decimal places. I am sure it is very simple line or two of code but I am unsure how.
Thanks

double number = 123456.789;
DecimalFormat df = new DecimalFormat("#,##0.00");
System.out.println(df.format(number));
DesQuite

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Rounding Doubles to Two Decimal Places

Hi All,
I've searched the archive and found a few different posts regarding restricting the number of decimal places in doubles. However they all suggest different methods, BigDecimal, NumberFormat etc.
Which is the simplest method of rounding a number say 10.023445656 to 10.02?
I tried using the java.text.NumberFormat but this turns the double into a string and I need the end result to be a double.
Thanks

Hi All,
I've searched the archive and found a few different
posts regarding restricting the number of decimal
places in doubles. However they all suggest different
methods, BigDecimal, NumberFormat etc.
Which is the simplest method of rounding a number say
10.023445656 to 10.02?
I tried using the java.text.NumberFormat but this
turns the double into a string and I need the end
result to be a double.
ThanksI ahve a small code that can do the work for u:
import java.text.*;
double format(double val, int dec){
    double multiple=Math.pow(10,dec);
    val=Math.round(val*multiple)/multiple;
    DecimalFormat df=new DecimalFormat("0.00");
    String format=df.format(val);
   double dval=Double.parseDouble(format);
   return dval;
}//end of functionHope that helps!

How can I limit a double value to two decimal place?

How can I limit a double value to two decimal place?
Java keeps on adding zero's to a simple double subtraction:
1497 - 179.64 = 1317.3600000000001The answer must have been simply: 1317.36

If the trouble is with output ...
If the trouble is with value accuracy ...The trouble is with OPs understanding of and/or expectations of IEEE 754 floating point numbers. o_O
[And it's probably a view (output) issue.]
how can i actually use numberformat to cut those
unwanted decimal places?Read the API - Puce already provided the link.

How to correct a double value to two decimal places

hi,
How to correct a double value to two decimal places
eg.
double tt=100.100032
i want to correct to 2 decimal places
ie tt=100.10
regards,
jagan

Check my other reply on the other thread. Please don't cross-post.

Help!printing float values with two decimal places

hi there java pips! im a newbie to this technology so forgive me for this really stupid question....i would like to perform mathematical operations on two float values....the problem is i want to print them in a standard format and that is i want them to be displayed with two decimal places (e.g 190.00, 12,72, 1,000.01) how can i do this?

Try java.text.DecimalFormat
NumberFormat nf = new DecimalFormat("0.00");
System.out.println(nf.format(x));

Double value truncated to two decimal places without rounding the value.

I want to truncate double value to two decimal places without doing the rounding of the value.
Is there any method which can directly do the truncation.

There's many ways to achieve this such as using
BigDecimal's setScale method or type-casting. This is
the way I like to do it:double d = -5.239;
d = d > 0 ? Math.floor(d * 100) / 100.0 : Math.ceil(d
* 100) / 100.0;
Your division by 100 may cause an rounding error, because there are numbers which no finite binary representation. That's splitting hairs! I know ;-)

Printing to two decimal places on the screen

Hi everyone...
I am using mysql as my DB...my field is declared there as decimal(8,2) means to 2 decimal place..when i am getting the result i also need to print to 2 decimal place...
so when i do(rs.getDouble("Price")) it is not printing as two decimal place...how do i get it to print to 2 decimal place...
Thanx a lotttttt

javax.text.DecimalFormat dfrm t=new java.text.DecimalFormat("#0.00");
//or another format see API doc for DecimalFOrmat
String result = dfrm.format(rs.getDouble("Price"));

Printing two decimal places from BigDecimal values

I am using BigDecimal to represent money values. My output needs to line up so that (with a non-proportional font) the decimal point and the two decimal places are in the same columns for each line. But when the dollar value has zero cents, or has a number of cents that is divisible by ten, it drops the trailing zeroes, and drops the decimal point if the decimal places are both zeroes. For example, I want to see "25.00" instead of "25" and "25.50" instead of "25.5". It doesn't seem to make any difference if I set the scale to 2. (I have resorted to getting the toString() of the BigDecimal and hacking the string before I display it, but surely there must be an easier way?)
      BigDecimal aaa = new BigDecimal("25");
      BigDecimal bbb = new BigDecimal("25.0");
      BigDecimal ccc = new BigDecimal("25.00");
      BigDecimal ddd = new BigDecimal("25.5");
      BigDecimal eee = new BigDecimal("25.50");
      BigDecimal fff = new BigDecimal("25.75");
      aaa.setScale(2);
      bbb.setScale(2);
      ccc.setScale(2);
      ddd.setScale(2);
      eee.setScale(2);
      fff.setScale(2);
      System.out.println("SCALE SET TO 2: ");
      System.out.println("aaa = " + aaa);
      System.out.println("bbb = " + bbb);
      System.out.println("ccc = " + ccc);
      System.out.println("ddd = " + ddd);
      System.out.println("eee = " + eee);
      System.out.println("fff = " + fff);produces this output:
SCALE SET TO 2:
aaa = 25
bbb = 25.0
ccc = 25.00
ddd = 25.5
eee = 25.50
fff = 25.75Thanks,
Martin

Thankyou Dr. Clap. This solved my problem - I added an LHS to the setScale statements:
      aaa = aaa.setScale(2);
      bbb = bbb.setScale(2);
      ccc = ccc.setScale(2);
      ddd = ddd.setScale(2);
      eee = eee.setScale(2);
      System.out.println("SCALE SET TO 2: ");
      System.out.println("aaa = " + aaa);
      System.out.println("bbb = " + bbb);
      System.out.println("ccc = " + ccc);
      System.out.println("ddd = " + ddd);
      System.out.println("eee = " + eee);produced:
SCALE SET TO 2:
aaa = 25.00
bbb = 25.00
ccc = 25.00
ddd = 25.50
eee = 25.50

A double with 2 decimal places

I need to output a double that has 2 decimal places. The default is just one and I don't know the command to make it two. For example,i want an output of 37.5 to be displayed as 37.50. If you know the command, please tell me. Thanks!

Looks like you are trying to deal with money.
Firstly if you are dealing with money store everything as the lowest form of currency in your given area. eg as pence or cents and place it in a int or long. That way you dont get any rounding erros when you multiply up the value.
To put two decimal places on a number is easy just use a DecimalFormat from java.text
Like this
double myNumber = 3.1;
DecimalFormat decF = new DecimalFormat( "######0.00" );
String myFormattedNumber = decF.format( myNumber );
System.out.print( "My number is " + myFormattedNumber ); The #######0.00 in the DecimalFormat constructor call is a pattern that is used to format the number. The # indicate an optional number the 0 indicates a required number and if one is not provided a 0 will be included.

Is it possible to convert a float to two decimal places

Can anyone help me to convert a float to two decimal places
float f=16;
System.out.println(f);
It will print 16.0
But I want to get printed as 16.00

"convert" no, as no conversion is needed, obviously. Format the output, yes. Read the API for String and its printf method.

How to take float precision to two decimal places?

Hi, everybody:
I'm a straight noob...first week in Java programming. Before you bash me for not checking FAQs and such, believe me, I have.
I have tried BigDecimal movePointLeft, but I don't know how to construct it using proper syntax. I also tried currency and toString but I keep messing up my syntax somehow. Four hours into this and nothing is working.
Here is the problem: I have a float. I want to format its output to two decimal places, trying to achieve in Java what C would produce as:
printf("The amount you owe is $%.2f", fltAnyName);
Any help would be appreciated.
Thanks,
Rob

Sorry, guys. I have tried both recommendations and I can't get either to work. I'm getting a compile error pointing to the delineating period between the "out" and "printf" when I try the C-like code. I have 1.5, too. I know your advice is sound so I must be doing something wrong. Can you insert the code DecimalFormat code that will correct this problem where it needs to go? The packages below have been included becasue of all the different solutions I have attempted.
import java.io.*;
import java.math.*;
import java.text.*;
import java.lang.*;
public class CoinCalculator2
     public static void main(String[] args) throws IOException
          String strQuartes, strDimes, strNickels, strPennies;
          int intQuartes, intDimes, intNickels, intPennies;
          float fltValue;
          BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));
          System.out.println("THE COIN CALCULATOR");
          System.out.println();
          System.out.print("Enter the number of quarters you have: ");
               strQuartes = dataIn.readLine();
               intQuartes = Integer.parseInt(strQuartes) * 25;
          System.out.print("Enter the number of dimes you have: ");
               strDimes = dataIn.readLine();
               intDimes = Integer.parseInt(strDimes) * 10;
          System.out.print("Enter the number of nickles you have: ");
               strNickels = dataIn.readLine();
               intNickels = Integer.parseInt(strNickels) * 5;
          System.out.print("Enter the number of pennies you have: ");
               strPennies = dataIn.readLine();
               intPennies = Integer.parseInt(strPennies);
          fltValue = (intQuartes + intDimes + intNickels + intPennies) / 100;
          System.out.println();
          System.out.println("The value of your coins is $" + fltValue);
          System.out.println();
}

Rounding off a float to two decimal places

I want to make a function where I shall pass a float and and integer.
The float shall have to be rounded off to a value in the integer.
Can anyone please suggest how to round off a float.
E.g.: if the float is 12.56890 and I want to round it off to 2 decimal places, then it should be 12.57.
Regards
Hawker

I didn't mention any datatypes like float, double.True, but that is what the question is about, so you weren't answering the question. For a change.
As I mentioned, that was just a mathematical steps to round of the floating point value. (Not in any programming languages point of view).False. You didn't mention that at all.
This is the code for that in java.So here you are mentioning datatypes and floats for the same piece of mathematics that you have already been told, with reasons, doesn't work in floating point.
which seems to be working fine
Seems to. What evidence do you have that the float actually got rounded? As opposed to got displayed as rounded? Which is not what the OP asked for.
And of course all that code seems to do is round 0.01 to two decimal places, which again is not what the OP asked for.
For any remaining fans of this 'technique', please explain the behaviour of the following code:
     public static void     main(String[] args)
          int     count = 0, errors = 0;
          for (double x = 0.0; x < 1; x += 0.0001)
               count++;
               double     d = x;
               int     scale = 2;
               double     factor = Math.pow(10, scale);
               d = Math.round(d*factor)/factor;
               if ((d % 0.01) != 0.0) // if 'd' really has been rounded this should be zero
                    System.out.println(d % 0.01);
                    errors++;
          System.out.println(count+" trials "+errors+" errors");
     }

Rounding off to two decimal places

Hello,
For simplicity, is there a method which will round off
a double variable to two decimal places.
Excample: if I have a result which equals 2.1999998
and I want to display this as 2.20 in a TexTField.
Any help would be much appreciated.
Thanks

If you are trying to do dollars and cents, I further recommend you use:NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance();
String currencyOut = currencyFormatter.format(yourNumber);to format your numbers as they will give the correct precision for international currencies simply by setting the locale, and they will also automatically handle the currency symbols ($, DM FR, etc.)
Doug

Formatting Strings to two decimal places

When formatting double amounts to two decimal places, I looked up the procedure online and I have this so far:
     public void calculatePayments()
          double monthlyInterestRate = (Double.parseDouble(interestBox.getText())/12)/100;
          double amountOfLoan = Double.parseDouble(balanceBox.getText());
          double numberOfPayments = Double.parseDouble(yearsBox.getText()) * 12;
          DecimalFormat Currency = new DecimalFormat("0.00");
          double paymentAmount = (amountOfLoan * monthlyInterestRate) / (1 - Math.pow(1/(1 + monthlyInterestRate),numberOfPayments));
          double formattedAmount = Currency.format(paymentAmount);
          String s = Double.toString(paymentAmount);
          tableBox.append(s);
          tableBox.setText("Payment" + "\n" + "Number" + "\n");
          for(int i = 0; i <= numberOfPayments; i++)
                    tableBox.append("" + i + "\n");
However, I get the following:
ProgramInterface.java:134: incompatible types
found : java.lang.String
required: double
          double formattedAmount = (Currency.format(paymentAmount));
I'm trying to append the number to a text box (I'm making a loan calculator for my 155 class) Thanks for the help

String s = Currency.format(paymentAmount);Next time please paste your code between code tags exactly like this:
[code]
your code
[/code]
You can do that by simply pasting your code in the message area, highlight it and then click on the code button above.
You may read the [url http://forum.java.sun.com/help.jspa?sec=formatting]Formatting tips for more information.
Regards

Result to two decimal places

Hi I have the following code for currency conversion, now I want that when a converted currency result is for example 1.8 it displays 1.80 ie to two decimal places. how is this done? thanks
private void converteurosButtonActionPerformed(java.awt.event.ActionEvent evt) {
//Parse Euros as a double and convert to GBP.
    DecimalFormat df = new DecimalFormat("#,###.##");
    double gbp = (double) (Double.parseDouble(eurosTextField1.getText())) * 0.796345;
    convertedeurosLabel.setText("� "+df.format(gbp));

private static DecimalFormat format = new DecimalFormat("0.00");
private String format(double value) {
    return format.format(value);
// call as
format(2.999);

Print Doubles to two decimal places?

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