I want to parse string to double but with scientific notation. Please provide ant solution for solving this problem.
String str="123434344";
Double db=Double.parseDouble(str);
System.out.println("Value:"+db);
This is my output:
Value:1.23434344E8
but i want to this double like this: 123434344.00
How it is possible please provide me solution for this. Thanks a lot.!!
String str="123434344";
Double db=Double.parseDouble(str);
DecimalFormat format = new DecimalFormat("0.00");
System.out.println("Value:"+format.format(db));
You could use :
DecimalFormat df = new DecimalFormat("0.00");
Double d = Double.parseDouble("123434344");
System.out.println(df.format(d));
The output will be :
123434344.00
System.out.printf("Value: %0.2f%n", db);
Print formated, Where %n stands for newline.
Related
I'm having some problems formatting the decimals of a double. If I have a double value, e.g. 4.0, how do I format the decimals so that it's 4.00 instead?
One of the way would be using NumberFormat.
NumberFormat formatter = new DecimalFormat("#0.00");
System.out.println(formatter.format(4.0));
Output:
4.00
With Java 8, you can use format method..: -
System.out.format("%.2f", 4.0); // OR
System.out.printf("%.2f", 4.0);
f is used for floating point value..
2 after decimal denotes, number of decimal places after .
For most Java versions, you can use DecimalFormat: -
DecimalFormat formatter = new DecimalFormat("#0.00");
double d = 4.0;
System.out.println(formatter.format(d));
Use String.format:
String.format("%.2f", 4.52135);
As per docs:
The locale always used is the one returned by Locale.getDefault().
Using String.format, you can do this:
double price = 52000;
String.format("$%,.2f", price);
Notice the comma which makes this different from #Vincent's answer
Output:
$52,000.00
A good resource for formatting is the official java page on the subject
You could always use the static method printf from System.out - you'd then implement the corresponding formatter; this saves heap space in which other examples required you to do.
Ex:
System.out.format("%.4f %n", 4.0);
System.out.printf("%.2f %n", 4.0);
Saves heap space which is a pretty big bonus, nonetheless I hold 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 slightly though).
double d = 4.0;
DecimalFormat nf = DecimalFormat.getInstance(Locale.ENGLISH);
System.out.println(nf.format("#.##"));
You can use any one of the below methods
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));
If you want to convert it into simple string format
System.out.println(String.format("%.2f", 4.0));
All the above code will print 4.00
new DecimalFormat("#0.00").format(4.0d);
An alternative method is use the setMinimumFractionDigits method from the NumberFormat class.
Here you basically specify how many numbers you want to appear after the decimal point.
So an input of 4.0 would produce 4.00, assuming your specified amount was 2.
But, if your Double input contains more than the amount specified, it will take the minimum amount specified, then add one more digit rounded up/down
For example, 4.15465454 with a minimum amount of 2 specified will produce 4.155
NumberFormat nf = NumberFormat.getInstance();
nf.setMinimumFractionDigits(2);
Double myVal = 4.15465454;
System.out.println(nf.format(myVal));
Try it online
There are many way you can do this. Those are given bellow:
Suppose your original number is given bellow:
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 pattern
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 in your formatter. Here are some rounding mode given bellow:
decimalFormat.setRoundingMode(RoundingMode.CEILING);
decimalFormat.setRoundingMode(RoundingMode.FLOOR);
decimalFormat.setRoundingMode(RoundingMode.HALF_DOWN);
decimalFormat.setRoundingMode(RoundingMode.HALF_UP);
decimalFormat.setRoundingMode(RoundingMode.UP);
Here are the imports:
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;
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));
}
}
First import NumberFormat. Then add this:
NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance();
This will give you two decimal places and put a dollar sign if it's dealing 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));
}
}
You can do it as follows:
double d = 4.0;
DecimalFormat df = new DecimalFormat("#.##");
System.out.print(df.format(d));
I know that this is an old topic, but If you really like to have the period instead of the comma, just save your result as X,00 into a String and then just simply change it for a period so you get the X.00
The simplest way is just to use replace.
String var = "X,00";
String newVar = var.replace(",",".");
The output will be the X.00 you wanted. Also to make it easy you can do it all at one and save it into a double variable:
Double var = Double.parseDouble(("X,00").replace(",",".");
I know that this reply is not useful right now but maybe someone that checks this forum will be looking for a quick solution like this.
I'm getting from server a string value formatted as follow: 14.5000
I need to create a double variable from it with two number after decimal point: 14.50. I've tried the following:
DecimalFormat df = new DecimalFormat("#,00");
Double priceD = Double.parseDouble((produitParam.item(paramNb).getTextContent()));
String dx = df.format(priceD);
produit.setPrixTtc(Double.valueOf(dx));
And I'm getting 14.5. If I use DecimalFormat("#.00"), it gives me 15...
Someone could help me with that ?
If you want string with precision upto 2 points after decimal you should use
DecimalFormat df = new DecimalFormat("#.00");
you have used "#,00"
',' is used for specifying grouping Separator.
for more information here is the Java Doc of DecimalFormat:
http://docs.oracle.com/javase/7/docs/api/java/text/DecimalFormat.html
you should look this link.There is a lot of answer your question.
I think.The best answer is DecimalFormat df = new DecimalFormat("#0.00");
for you in link
[how to convert double to 2 number after the dot?
I use double values in my project and I would like to always show the first two decimal digits, even if them are zeros. I use this function for rounding and if the value I print is 3.47233322 it (correctly) prints 3.47. But when I print, for example, the value 2 it prints 2.0.
public static double round(double d) {
BigDecimal bd = new BigDecimal(d);
bd = bd.setScale(2, BigDecimal.ROUND_HALF_UP);
return bd.doubleValue();
}
I want to print 2.00!
Is there a way to do this without using Strings?
EDIT: from your answers (which I thank you for) I understand that I wasn't clear in telling what I am searching (and I'm sorry for this): I know how to print two digits after the number using the solutions you proposed... what i want is to store in the double value directly the two digits! So that when I do something like this System.out.println("" + d) (where d is my double with value 2) it prints 2.00.
I'm starting to think that there is no way to do this... right? Thank you again anyway for your answers, please let me know if you know a solution!
You can use something like this:
double d = 1.234567;
DecimalFormat df = new DecimalFormat("#.00");
System.out.print(df.format(d));
Edited to actually answer the question because I needed the real answer and this came up on google and someone marked it as the answer despite the fact that this wasn't going to work when the decimals were 0.
Use the java.text.NumberFormat for this:
NumberFormat nf= NumberFormat.getInstance();
nf.setMaximumFractionDigits(2);
nf.setMinimumFractionDigits(2);
nf.setRoundingMode(RoundingMode.HALF_UP);
System.out.print(nf.format(decimalNumber));
You can simply do this:
double d = yourDoubleValue;
String formattedData = String.format("%.02f", d);
DecimalFormat is the easiest option to use:
double roundTwoDecimals(double d) {
DecimalFormat twoDecimals = new DecimalFormat("#.##");
return Double.valueOf(twoDecimals.format(d));
}
Hope this solves your issue...
java.text.DecimalFormat df = new java.text.DecimalFormat("###,###.##");
df.setMaximumFractionDigits(2);
df.setMinimumFractionDigits(2);
You can use something like this:
If you want to retain 0 also in the answer:
then use (0.00) in the format String
double d = 2.46327;
DecimalFormat df = new DecimalFormat("0.00");
System.out.print(df.format(d));
The output: 2.46
double d = 0.0001;
DecimalFormat df = new DecimalFormat("0.00");
System.out.print(df.format(d));
The output: 0.00
However, if you use DecimalFormat df = new DecimalFormat("0.##");
double d = 2.46327;
DecimalFormat df = new DecimalFormat("0.##");
System.out.print(df.format(d));
The output: 2.46
double d = 0.0001;
DecimalFormat df = new DecimalFormat("0.##");
System.out.print(df.format(d));
The output: 0
I would just use something like:
System.out.printf("%.2f", theValueYouWantToPrint);
This gives you two decimals.
I'm having some problems formatting the decimals of a double. If I have a double value, e.g. 4.0, how do I format the decimals so that it's 4.00 instead?
One of the way would be using NumberFormat.
NumberFormat formatter = new DecimalFormat("#0.00");
System.out.println(formatter.format(4.0));
Output:
4.00
With Java 8, you can use format method..: -
System.out.format("%.2f", 4.0); // OR
System.out.printf("%.2f", 4.0);
f is used for floating point value..
2 after decimal denotes, number of decimal places after .
For most Java versions, you can use DecimalFormat: -
DecimalFormat formatter = new DecimalFormat("#0.00");
double d = 4.0;
System.out.println(formatter.format(d));
Use String.format:
String.format("%.2f", 4.52135);
As per docs:
The locale always used is the one returned by Locale.getDefault().
Using String.format, you can do this:
double price = 52000;
String.format("$%,.2f", price);
Notice the comma which makes this different from #Vincent's answer
Output:
$52,000.00
A good resource for formatting is the official java page on the subject
You could always use the static method printf from System.out - you'd then implement the corresponding formatter; this saves heap space in which other examples required you to do.
Ex:
System.out.format("%.4f %n", 4.0);
System.out.printf("%.2f %n", 4.0);
Saves heap space which is a pretty big bonus, nonetheless I hold 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 slightly though).
double d = 4.0;
DecimalFormat nf = DecimalFormat.getInstance(Locale.ENGLISH);
System.out.println(nf.format("#.##"));
You can use any one of the below methods
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));
If you want to convert it into simple string format
System.out.println(String.format("%.2f", 4.0));
All the above code will print 4.00
new DecimalFormat("#0.00").format(4.0d);
An alternative method is use the setMinimumFractionDigits method from the NumberFormat class.
Here you basically specify how many numbers you want to appear after the decimal point.
So an input of 4.0 would produce 4.00, assuming your specified amount was 2.
But, if your Double input contains more than the amount specified, it will take the minimum amount specified, then add one more digit rounded up/down
For example, 4.15465454 with a minimum amount of 2 specified will produce 4.155
NumberFormat nf = NumberFormat.getInstance();
nf.setMinimumFractionDigits(2);
Double myVal = 4.15465454;
System.out.println(nf.format(myVal));
Try it online
There are many way you can do this. Those are given bellow:
Suppose your original number is given bellow:
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 pattern
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 in your formatter. Here are some rounding mode given bellow:
decimalFormat.setRoundingMode(RoundingMode.CEILING);
decimalFormat.setRoundingMode(RoundingMode.FLOOR);
decimalFormat.setRoundingMode(RoundingMode.HALF_DOWN);
decimalFormat.setRoundingMode(RoundingMode.HALF_UP);
decimalFormat.setRoundingMode(RoundingMode.UP);
Here are the imports:
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.util.Locale;
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));
}
}
First import NumberFormat. Then add this:
NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance();
This will give you two decimal places and put a dollar sign if it's dealing 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));
}
}
You can do it as follows:
double d = 4.0;
DecimalFormat df = new DecimalFormat("#.##");
System.out.print(df.format(d));
I know that this is an old topic, but If you really like to have the period instead of the comma, just save your result as X,00 into a String and then just simply change it for a period so you get the X.00
The simplest way is just to use replace.
String var = "X,00";
String newVar = var.replace(",",".");
The output will be the X.00 you wanted. Also to make it easy you can do it all at one and save it into a double variable:
Double var = Double.parseDouble(("X,00").replace(",",".");
I know that this reply is not useful right now but maybe someone that checks this forum will be looking for a quick solution like this.
I need to format a decimal value into a string where I always display at lease 2 decimals and at most 4.
So for example
"34.49596" would be "34.4959"
"49.3" would be "49.30"
Can this be done using the String.format command?
Or is there an easier/better way to do this in Java.
Yes you can do it with String.format:
String result = String.format("%.2f", 10.0 / 3.0);
// result: "3.33"
result = String.format("%.3f", 2.5);
// result: "2.500"
You want java.text.DecimalFormat.
DecimalFormat df = new DecimalFormat("0.00##");
String result = df.format(34.4959);
Here is a small code snippet that does the job:
double a = 34.51234;
NumberFormat df = DecimalFormat.getInstance();
df.setMinimumFractionDigits(2);
df.setMaximumFractionDigits(4);
df.setRoundingMode(RoundingMode.DOWN);
System.out.println(df.format(a));
java.text.NumberFormat is probably what you want.
NumberFormat and DecimalFormat are definitely what you want. Also, note the NumberFormat.setRoundingMode() method. You can use it to control how rounding or truncation is applied during formatting.
You want java.text.DecimalFormat