1. How to round a number to n decimal places in Java stackoverflow.comWhat I'd like is a method to convert a double to a string which rounds using the halfup method. I.e. if the decimal to be rounded is a 5, it always ... 
2. How to check if a double has at most n decimal places? stackoverflow.comCurrently i have this method:

3. Java: Check if two double values match on specific no of decimal places stackoverflow.comComparing those two values shall result in a "true":
Thanks in advance!

4. How many decimal Places in A Double (Java) stackoverflow.comAll, Is there any in built function in java to tell me how many decimal places in a double. For example: 101.13 = 2 101.130 = 3 1.100 = 3 1.1 = 1 3.2322 = 4 ... 
5. Rounding off a double to 3 digit decimal place but zero at 3rd decimal place disappears in java stackoverflow.comI want to round of my double to 3 decimal places in java. I don't want to trim off the zero. So if my double is 2.34, I still want it ... 
6. How do you generate a random number with decimal places stackoverflow.com

7. Moving decimal places over in a double stackoverflow.comSo I have a double set to equal 1234, I want to move a decimal place over to make it 12.34 So to do this I multiply .1 to 1234 two times, ... 
8. round double to two decimal places in java stackoverflow.comok this is what I did to round a double to 2 decimal places,

9. Rounding to 2 decimal places stackoverflow.com
Is there a better way to round decimals to 2 decimal places?

10. Using double up to two decimal places stackoverflow.comI want to use double up to just 2 decimal places. i.e. it will be stored upto 2 decimal places, if two double values are compared then the comparison should be ... 
11. DecimalFormat decimal places stackoverflow.comCurrently, I have BigDecimal values with 3 decimal places shown in a JTable. When i get values as 2.500 or 1.000, I want to have 2.5 and 1.0 instead. That's why ... 
12. Java: Getting time with currentTimeMillis() as a long, how do I output it with X decimal place accuracy? stackoverflow.comI have a long that represents System.currentTimeMillis(). I then took another measurement of the time into a long var later in my code. I subtracted the two but now want to ... 
13. How can I truncate a double to only two decimal places in Java? stackoverflow.comFor example I have the variable 3.545555555, which I would want to truncate to just 3.54. 
14. How to display a number with many decimal places? (Java) stackoverflow.comI was wondering if there is a way to "cheat" and work with numbers with way more decimal places than a double in Java, and then display it via 
15. Rounding float/decimal to 3 decimal places exactly? stackoverflow.comI know there are many questions asking for this, but I have tried quite a few of the solutions but none seem to work exactly how I need it! Most solutions work, ... 
16. Trim Double to 2 decimal places stackoverflow.comshould be an easy one. I originally was gonna do this in javascript but have to do it prior to setting to the form in my handler page. Anyway ... 
18. Urgent A method in Java which rounds 18 places to 8 places after decimal coderanch.com 
19. Rounding Down To 2 Decimal Places coderanch.com 
20. trying to restrict decimal places in double coderanch.comHi Just a quick one. Anyone know how to restrict the number of decimal places in a doouble value to 2? I've had a look around and seen a few answer with silly caluculations (divide by 100 * by itself etc...) but none of them seem to work. All i want to do is reduce the decimal places for a value ... 
21. String to double losing decimal places coderanch.comWhy does the following occur? A double can hold these numbers can't it? source = "1234567890123.1234"; dvalue = Double.parseDouble(source); result = formatter.format(dvalue); out.print(source + " = " + result + br); //gives1234567890123.1234 = 1,234,567,890,123.1233 source = "12345678901234.1234"; dvalue = Double.parseDouble(source); result = formatter.format(dvalue); out.print(source + " = " + result + br); //gives12345678901234.1234 = 12,345,678,901,234.123 source = "123456789012345.1234"; dvalue = Double.parseDouble(source); ... 
22. Decimal Place Problem coderanch.comHi guys, I can't get the right decimal format to print on my screen. Here's an example. Zoom Percentage: 9/128 = 0.0 Zoom Percentage: 7/26 = 0.0 Zoom Percentage: 5/26 = 0.0 Zoom Percentage: 7/19 = 0.0 Zoom Percentage: 2/19 = 0.0 Zoom Percentage: 3/18 = 0.0 Zoom Percentage: 2/18 = 0.0 Zoom Percentage: 1/14 = 0.0 Zoom Percentage: 2/14 = ... 
23. Rounding a float value upto 2 decimal places coderanch.com 
24. Is it possible to convert a float to two decimal places coderanch.com 
25. Set Decimal Places for a Float value coderanch.com 
26. 2 decimal places coderanch.comHow can I guarantee that a double result will always be in the 2 decimal places format? I've noticed that using double actually distorts the real result. For example : 15.62  10 = 5.619999999 (or something like that). I want it to equal 5.62 as any normal person would. Any help??? 
27. Dealing with decimal places coderanch.com 
28. How to restrict the decimal place of a floating point number? coderanch.comHi, Here is my code: public void TwoDecimal(double u){ String w = Double.toString(u); int c = w.length(); System.out.println(c); if (c <= 5) { double a = Double.parseDouble(w); System.out.println(a); } else { System.out.println("Invalid input!"); } } I want to show a floating point number which has 2 digits and 2 decimal places, e.g. 45.82, 29.67. This number is input by user and ... 
29. Method for limiting decimal places? coderanch.comI'm using the double type within an equation and printing out the results. However, depending on the double types used within the equation, I can end up with several places to the right of the decimal point. Is there a method that will limit the number places to the right of a decimal point? Thanks for your time, 
30. Only 2 decimal places!!!! coderanch.comThanks for the help, but im very new to java and im not too sure where the code goes for the decimal format...? import javax.swing.JOptionPane; public class Assignment1 { public static void main(String[] args) { // calls method start(); } public static void start(){ // declares all the vars... String choice1, choice9, choice2, choice3, choice; int one, two, three, tot1, tot2, ... 
31. Rounding Doubles to Two Decimal Places coderanch.comSince you are using JUnit, there is no reason to round. Instead, you should use Assert.assertEquals(double expected, double actual, double precision) to compare the two numbers. The last parameter indicates the accuracy of your comparison. For example, you can do something like Assert.assertEquals(manualValue, calculatedValue, 0.01) To assert that your calculated value is within 1/100 th of the manually derived value. For ... 
32. Require output to 2 decimal places coderanch.com 
33. Number of decimal places? coderanch.comI want to write a function which returns the number of decimal places a given number has (double). It sort of works... but not 100%. Here is what i have so far: //return an integer stating how many decimal points the number has //assume the number provided is a positive double private static int getNumberOfDecimals(double number){ //convert the number to a ... 
34. Decimal place result coderanch.com 
35. Rounding to decimal places. coderanch.comhi jon, i can't contribute to the DecimalFormat question, but if you only need to do this conversion a few times, it might not be worth the creation of an additional object. in this case, i would prefer a handmade code, e.g. double fact = Math.pow(10, nDigits); double rounded = Math.round(x*fact) / fact; nDigits is the decimal place you want to ... 
36. How to find number of decimal places? coderanch.com 
37. How do i round a double to two decimal places? coderanch.comI've tried a couple of math formula's, and using java.text.decimalformatter buut, I'm not having much luck. I need something that not only works for decimals with a large amount of numbers after the decimal point. But also something that works for converting an int 30, to double 30.0 and than gives me 30.00...if possible. Is it? 
38. Decimal Places coderanch.comI hope someone can lead me in the right direction. I am trying to format my currency to two decimal places, for instance, whenever I enter an amount like 75.50 is shows up as 75.5. Also whenever the program computes the change is comes out as 3.0900000034. Here is an example of the output I get Enter amount of purchase: 98.00 ... 
39. Limiting decimal places in a double javaforums.orgAgree. Avoid RoseIndia unless you want advice that may or may not be correct. The question I would like to ask is this: do you truly want to round the number or the display of numbers? Often what matters is the latter, and if that is your case, then you may wish to look into the String.format/Formatter/printf family or DecimalFormat. Edit: ... 
40. 2 decimal places needed javaforums.org 
41. 3 Decimal Places javaforums.orgYou're going to need to show more information, as I don't know where those numbers at the bottom are coming from, or really what you are trying to do. Maybe post what your test data is or better yet your test class. In your setHoursWorked(int, int) make sure you either typecast the min variable to a double or the 60 to ... 
42. keep double accurate to two decimal places javaforums.org 
43. round to two decimal places javaforums.org 
44. force a double to 2 decimal places javaforums.org 
45. Convert double to 2 decimal places? javaforums.org 
46. decimal places and colors forums.oracle.comAlso, im not sure this technically counts as a "java" question, but im trying to do it in my java program so ... i'll ask anyway and hope its not too inappropriate. Im trying to use the Color class to specify an RGB value thats somehow based off of another value in my objects. I have a number between 0 and ... 
47. Rounding to a decimal place forums.oracle.com 
48. rounding the a decimal place forums.oracle.com 
49. Round decimal number to two places forums.oracle.comtrying to round a decimal number to two places i.e. 1.98999 should round to 1.99. tried using math.round but it only rounds to nearest integer tried using decimalformat class but that converts to string, and cast wont allow me to convert from string back to double *is there a round method that allows you to specify decimal places? *or is there ... 
50. Two decimal places forums.oracle.compublic class RoundTwoDecimalPlaces{ public static void main(String[] args) { float num = 2.954165f; float round = Round(num,2); System.out.println("Rounded data: " + round); } public static float Round(float Rval, int Rpl) { float p = (float)Math.pow(10,Rpl); Rval = Rval * p; float tmp = Math.round(Rval); return (float)tmp/p; } } Edited by: javaboy on Nov 11, 2007 12:46 PM 
51. Is it possible to convert a float to two decimal places forums.oracle.com 
52. Math.sqrt + rounding up to four decimal places forums.oracle.com 
53. rounding to 3 decimal places forums.oracle.com 
54. rounding to 2 decimal place forums.oracle.com 
55. How can I limit a double value to two decimal place? forums.oracle.com 
56. Rounding up doubles to 2 decimal places forums.oracle.comNope, nothing to do with money, however my rounding method uses Math.round(100*x) and then divides by 100 to get the output. I reason I want to get rid of the zeros is because it is part of an assignment that states that we ned to get rid of any trailing zeros. I tried using the format method but i couldn't work ... 
57. Rounding up doubles to 2 decimal places forums.oracle.comHi i have written a simple project to convert currency which is working fine but i am struggling to figure out how to round the outputs to two decimal places. E.g. 1.563434 would equal 1.56. Here is the program i have written but i do not know where to add the math instruction or which to use as there seems to ... 
58. help with decimal places forums.oracle.com 
59. How to write an average to one decimal place and make it round up. forums.oracle.comGot him angry. There you go Djaunl. I can always count on you warnerja. @MoMo: How do you expect to get help when you insult people? How do you expect to get help when you cannot communicate? How do you expect to get help when someone on the internet launches you into a ragefilled tirade? Why are you taking a class ... 
60. decimal places forums.oracle.comif i do that the calculations are all wrong. so what did i mess up? Not knowing what "all wrong" means how can I know. The line W=(H*H)/28; says square H then divide by 28 before converting to a double. The division is done in integer so all decimal places are lost. You could change this to W=(H*H)/28.0 but this will ... 
61. rounding numbers to 2 decimal places forums.oracle.comi thought that my equation would be causing a problem and that i might need to do a cast  I relized that this is not the problem for the type of string i am using the ("0.00") After trying various things the string does work if im just outputing it to the screen but i also use this rounding in ... 
62. New question....adding decimal places... forums.oracle.comThere is a 10.00% tax on the total order amount. Write a Java program that reads the number of each type package on an order and computes the cost for the packages of each type ordered. Total the order, calculate the tax on the order, and the total including the tax. Print all items read and all items calculated with appropriate ... 
63. How to convert return to 2 decimal places? forums.oracle.com 
64. 2 decimal places forums.oracle.com 
65. how can I convert double to 3 decimal places? forums.oracle.com 
66. Excel and Java Decimal Place Precision forums.oracle.comExcel and Java shows decimal places differently. For example if I square 19.0626, the last three digits is not the same. Java  363.3833508 Excel  363.3833539 Is there a way to fix this? I want the number to follow the Excel precision This is how I produce the number  sqrtAverage = (average  Double.parseDouble(input.get(i))) * (average  Double.parseDouble(input.get(i))); 
67. Three decimal places in my calculation forums.oracle.comHi, I have a division calculation, a/b where both a and b are int's. now when i want the result upto 3 decimal places. i have done this. Double d = a/b; DecimalFormat c = new DecimalFormat("0.###"); c.format(d); System.out.println(d); Still I am unable to get 3 decimal places. I want 3 decimal places even for a 0 value like 0.000. Thanks. ... 
68. Limit a float value to single decimal place after round off forums.oracle.com 
69. how do i round a double to 2 decimal places forums.oracle.comDo you mean you want to round the result to 2 decimal places, or you want to display it to 2 decimal places? If the latter, then yes, DecimalFormat is the place to look. If you actually want to truncate the value and use it later, I would suggest either using BigDecimal, or using integers and multiplying by 100. Then divide ... 
70. how to change a double to 2 or less decimal places forums.oracle.com 
71. result to two decimal places forums.oracle.com 
72. help on limiting decimal places forums.oracle.comHi I have set up some code which increments.When i inspect it as it is incrementing it can go from 4....4.900009 etc.... and i was wondering if there was a way how i can limit how many decimal place it can take up.It would be helpful if it was 2 dp.Could anyone give some help and please may you give an ... 
73. help wanting to limit output to 2 decimal places :O forums.oracle.compublic class Main { public static void main(String[] args) { double Hours_Worked, Hourly_Wage, Total_Money; final double COMMISSION = 3.59 * .1; int noSoldFish; String UserName; System.out.println("Please enter the employee's name: "); UserName = Keyboard.readString(); System.out.println("Please enter hours worked by employee: "); Hours_Worked = Keyboard.readDouble(); System.out.println("Enter employee's hourly wage: $"); Hourly_Wage = Keyboard.readDouble(); System.out.println("Enter the number of fish sold by employee:"); noSoldFish ... 
74. displaying a double to decimal places forums.oracle.com 
75. I need help with setting 2 decimal places forums.oracle.com 
76. round decimal to two places forums.oracle.comtrying to round a decimal number to two places i.e. 1.98999 should round to 1.99. tried using math.round but it only rounds to nearest integer tried using decimalformat class but that converts to string, and cast wont allow me to convert from string back to double *is there a round method that allows you to specify decimal places? *or is there ... 
77. Is it possible to truncate float number to 0 decimal places forums.oracle.com 
78. Rounding to 9 decimal places forums.oracle.com 
79. rounding to two decimal places forums.oracle.com 
80. how to keep 2 decimal places for double value forums.oracle.com 
81. Round a double value to a specific number of decimal places? forums.oracle.comNo, because doubles hold values in binary (as do all values in a computer, of course, but there's no additional stuff to indicate decimal values). If you want values with specific rounding rules in decimal, use java.math.BigDecimal. If you just want to format the number with a specified number of decimal digits, use java.text.DecimalNumber. 
82. Two decimal places forums.oracle.comHi I am trying to convert a double number to two decimal places. Even if a number ends up as being 1.3, I want to convert it to 1.30 instead. I am using the DecimalFormat method and I got the following code for it: concessionField.setText("No"); String cf2 = priceField.getText(); double cfd2 = Double.parseDouble(cf2); cfd2 = cfd2 * 2; DecimalFormat df2 = ... 
83. How to find decimal place? forums.oracle.comIf I have a number such as: 123.45 how can I figure out that the number has a decimal point greater then 0? I just want to isolate the decimal part and compare it's value, but I'm not sure what a good way to do that would be. My first thought was to change it to a string and then back ... 
84. How to take float precision to two decimal places? forums.oracle.comString 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: ... 
85. rounding off a float to two decimal places forums.oracle.comI 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. ... 