CODEWITHSUNDEEP
javastring
Zuhayr Yaj
Zuhayr Yaj

Reputation: 43

How do insert commas into integers

If I have an integer that is 100,000

int integer = 100000;

My question is though, what if i wanted to put a comma after the first three digits so it does not look confusing and looks like 100,000. Also if the user was to change the integer to a million for example how do i then make the code automatically put a comma after the second pair of the third digits so it looks like this 100,000,000.

Upvotes: 1

Views: 284

Answers (4)

nunoh123
nunoh123

Reputation: 1217

You can use DecimalFormat like this:

DecimalFormat myFormatter = new DecimalFormat("###,###,###");
System.out.print(myFormatter.format(value));

Please reder to this page for more info on formatters http://docs.oracle.com/javase/tutorial/java/data/numberformat.html

Upvotes: 0

Sanjeev Kumar
Sanjeev Kumar

Reputation: 660

You can use _ to separate the digits of a number in java 7.

http://docs.oracle.com/javase/7/docs/technotes/guides/language/underscores-literals.html

Upvotes: 1

RealSkeptic
RealSkeptic

Reputation: 34618

Java doesn't allow commas, but it allows underscores for the same purpose:

   int integer = 100_000;

   integer = 100_000_000;

If you want to output it with commas, you have to use number formatting, as explained in other answers.

Upvotes: 4

Salih Erikci
Salih Erikci

Reputation: 5087

To display a readable represantation of a number, you can use the following.

System.out.println(NumberFormat.getNumberInstance(Locale.US).format(35634646));

Output: 35,634,646

Upvotes: 4

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