printf formatting in Java

Question

Here is my code:

System.out.printf("\n%-10s%9s%11s%13s%9s\n",
            "yearBuilt","area(sqf)","price","replaceRoof","sqfPrice");

System.out.printf("\n%-10d%9.1f$%11.2f%13s$%8.2f\n",
            house1.getYear(),house1.getSquareFeet(),house1.getPrice(),house1.isRoofChangeNeeded(),house1.calcPricePerSqf());

And here is the output I'm getting:

    yearBuilt area(sqf)      price  replaceRoof sqfPrice


    1996         2395.0$  195000.00         true$   81.42

This is the output I want:

    yearBuilt area(sqf)       price  replaceRoof sqfPrice


    1996         2395.0  $195000.00         true   $81.42

I tried using DecimalFormat but for some reason it didn't seem to work correctly when using it inside printf, when it worked normally in another area of my program. Any ideas on how to fix this?

What a well written question! "Here's what I did, Here's what I'm Trying to do, and here's what I got." Wish there were more like this. — Bassinator
– Bassinator, Commented Apr 9, 2015 at 1:20

Jean-François Savard · Accepted Answer · 2015-04-09 01:16:22Z

1

The problem is that you specify the price to be 11 digits fixed before the decimal, and sqfPrice to be 8 digits which cause the padding spaces.

If you decorticate your print statement :

System.out.printf("$%11.2f", 195000.0f);//print $  195000,0
System.out.printf("$%8.2f", 81.42f);//print $   81,42

You might want to use NumberFormat instead

NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance(currentLocale);

Assuming you gave US locale,

currencyFormatter.format(195000)

would output $195,000.00.

answered Apr 9, 2015 at 1:16

Jean-François Savard

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4 Comments

Kblo55 Over a year ago

So I added NumberFormat currencyFormatter = NumberFormat.getCurrencyInstance(); and changed my printf to

System.out.printf("\n%-10d%9.1f%11.2s%13s%8.2s\n", 				house1.getYear(),house1.getSquareFeet(),currencyFormatter.format(house1.getPrice()),house1.isRoofChangeNeeded(),currencyFormatter.format(house1.calcPricePerSqf()));

and now I'm getting: image

Jean-François Savard Over a year ago

@Kblo55 And what is wrong with this output ? The currency sign seems to be where you wanted it to be.

Kblo55 Over a year ago

It did fix the dollar sign placement, but the numbers aren't correct. It's showing $1 and $8 instead of the correct amounts.

Kblo55 Over a year ago

A friend helped me figure it out. I had to remove the .1 and .2 from my printf formatting for the two currency amounts because they were being converted to strings using the formatting. Thanks for your help!

Nirmal · Accepted Answer · 2015-04-09 01:34:02Z

0

It would be nice to be able to use the "$" sign with printf statements in java but we have to use the special class for that in java. The good news is that there are such available in the api.

Start with something like below.

DecimalFormat currencyFormatter = new DecimalFormat("$000000.00");
System.out.printf("\n%-10d%9.1f%11.2f%13s%8.2f\n",house1.getYear(),house1.getSquareFeet(),currencyFormatter.format(house1.getPrice()),house1.isRoofChangeNeeded(),currencyFormatter.format(house1.calcPricePerSqf());

Hope that helps.

answered Apr 9, 2015 at 1:34

Nirmal

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