How can I do format a number to with dots

Question

I have a 5 digit number and I want to put a dot/comma in the last step of this number.

1234 to 123,4
2564 to 256.4

I tried this but it wasn't

int val=1234;
NumberFormat number = NumberFormat.getInstance();
number.setMaximumFractionDigits(3);
String output = number.format(val);

Can you help me, please? Thanks in advance.

Does this answer your question? [How to set thousands separator in Java?](https://stackoverflow.com/questions/5323502/how-to-set-thousands-separator-in-java) — cutiko, Apr 14 '20 at 14:44
It's not clear whether you want to put `,` or `.` before the last digit. — Arvind Kumar Avinash, Apr 14 '20 at 14:51

score 3 · Accepted Answer · answered Apr 14 '20 at 14:45

3

If you're dealing with integers the easiest way achieve this is to just divide it by 10 and cast it to a double.

int a = 1234;
double b = (double) a/10;

This will turn 1234 into 123.4.

EDIT: This answer is based on your exact question. Putting a comma before the last digit.

answered Apr 14 '20 at 14:45

duplxey

131
7

1

Instead of `(double) a/10`, you can write also `a / 10.0`. – Arvind Kumar Avinash Apr 14 '20 at 14:54
Thank you for your answer. It worked for me. – theoyuncu8 Apr 14 '20 at 15:17
How can I close the issue – theoyuncu8 Apr 14 '20 at 15:19
You don't close it, you just accept the correct answer. Others might stumble across the same problem as you and will hopefully find this thread and the solution. – duplxey Apr 14 '20 at 20:23

score 1 · Answer 2 · answered Apr 14 '20 at 14:54

1

You can add any character before last digit using this code

String str = String.valueOf(1234);
Integer position = str.length()-1;
String newVal = str.substring(0, position) + "." + str.substring(position);
System.out.println(newVal); //123.4

answered Apr 14 '20 at 14:54

Dilan

2,333
7
21
30

Cool. Thank you! How can I close this issue – theoyuncu8 Apr 14 '20 at 15:18

How can I do format a number to with dots

2 Answers2