String commas

Hi,

Someone knows how do I force a integer to be showed with commas?

For exemple, I print a random number in the console, so I use this code:
int money = 2147289843
log.info("You have: " + money);

The result will be:
You have: 2,147,289,843

Ok, no problem there, but sometimes my code return as a String, so I need to manualy convert to integer, then i do:

int money = Integer.parseInt("2147289843");
But the result here don't have the commas, looking like:
You have: 2147289843 <ugly!

Halp? Maybe a pattern? I dunno how to use patterns :C

 

Try something like this:

Code:

String mon = money.toString();
String tmp = "";
for(int i = 0; i < mon.length(); i++) {
    tmp += mon.charAt(i);   
    if(i % 3 = 0) {
        tmp += "," + mon.charAt(i);
}
}

Something like that, just wrote this without checking if it works, so i think it will contain bugs...:/
But it shouldn't be to difficult to fix them

 

So simple

Thank you

Final code:

Code:

    public String commas(String str) {
        String temp = "";
        for (int i = 0; i < str.length(); i++) {
            temp += str.charAt(i);
            if (i % 3 == 0) {
                temp += ",";
            }
        }
        return temp.substring(0, temp.length() - 1);
    }

 

Lol no... Just use Formatter.

Code:java

public static String addCommas(int num)
{
    return String.format("%1$,d", num);
}

Or

Code:java

int money = Integer.parseInt("2147289843");
log.info(String.format("You have: %1$,d", money));