Java - Formatting multiple array output

Question

I'm new to java. I am trying to figure out how to format multiple arrays that are being filled in while the program is running (thanks to user input).

When I print the arrays, they do not format. I would use " " spaces, but the output of the arrays are dependent on what the user inputs. What I have is:

System.out.println("Order Summary:");
        System.out.println();
        System.out.println("Type                   Size          Quantity    Price");
        System.out.println("---------------------------------------------------------");
        for (i = 0; i < boolCount; i++)
        {
            System.out.println(typeArray[i] + sizeArray[i] + quantityArray[i] + priceArray[i]); //How to format?
        }

which would print out whatever is in the arrays without spaces. typeArray, sizeArray, and priceArray are String arrays, while quantityArray is an integer array.

I probably need to do System.out.printf(Enter code here) but I'm not sure how to do that with arrays. Any help would be appreciated.

EDIT: This is what I get if I add "\t" between the arrays:

System.out.println(typeArray[i] + "\t\t" + sizeArray[i] + "\t" + quantityArray[i] + "\t" + priceArray[i]);

Order Summary:
Type                   Size          Quantity    Price
---------------------------------------------------------
BBQ Chicken     Large   2   $25.98
Chicken-Bacon Ranch     Personal    22  $175.78
Meat Lovers     Extra Large 33  $791.67

Order total: $993.43

---------------------------------------------------

EDIT: This is what I get with:

System.out.printf("%-23.23s %-14.14s %-12.12d %-5.5s", typeArray[i], sizeArray[i], quantityArray[i], priceArray[i]);

Order Summary:

Type                   Size          Quantity    Price
---------------------------------------------------------
Exception in thread "main" java.util.IllegalFormatPrecisionException: 12
    at java.util.Formatter$FormatSpecifier.checkInteger(Formatter.java:2984)
    at java.util.Formatter$FormatSpecifier.<init>(Formatter.java:2729)
    at java.util.Formatter.parse(Formatter.java:2560)
    at java.util.Formatter.format(Formatter.java:2501)
    at java.io.PrintStream.format(PrintStream.java:970)
    at java.io.PrintStream.printf(PrintStream.java:871)
    at pizzamenu.PizzaMenu.main(PizzaMenu.java:372)
Java Result: 1

Could you try appending tab characters "\t" between the values ? — Arnaud
– Arnaud, Commented Feb 2, 2016 at 16:37
How about defining a maximum field length n, write a method that pads up to n or truncates down to n, then concatenate those length modified tokens with spaces? — Keefe Roedersheimer
– Keefe Roedersheimer, Commented Feb 2, 2016 at 16:39
What I am trying to do is an order summary after user orders pizza. Some of the 'specialty pizzas' have long names/short names which messes up the "\t" between the code, will edit answer to show — bankey
– bankey, Commented Feb 2, 2016 at 16:43
I think this would be the answer. stackoverflow.com/a/14421916/2961429 — du369
– du369, Commented Feb 2, 2016 at 16:44

sparkhee93 · Accepted Answer · 2016-02-02 17:03:52Z

1

You can use format specifiers.

Format specifiers follow the following format:

%[flags][width][.precision][argsize]typechar

So in your case, you would do the following:

System.out.printf("%-23s %-14s %-12d %-5s", typeArray[i], sizeArray[i], quantityArray[i], priceArray[i]);

More info on format specifiers: https://sharkysoft.com/archive/printf/docs/javadocs/lava/clib/stdio/doc-files/specification.htm

edited Feb 2, 2016 at 17:03

answered Feb 2, 2016 at 16:46

sparkhee93

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9 Comments

bankey Over a year ago

Gave me bunch of errors during run, do I need to import a class?

sparkhee93 Over a year ago

You said typeArray and sizeArray are String arrays, quantityArray is int arrays, and priceArray is double array?

bankey Over a year ago

typeArray, sizeArray, and priceArray are all string arrays. quantityArray is int. priceArray is a string array becauase I am adding "$" to priceArray[i]. I can just as easily change it to a double array and print the "$" seperately if that would make it easier

sparkhee93 Over a year ago

Oh okay, I just assumed price was a double. I changed the type of priceArray[i] to be string.

bankey Over a year ago

Still giving me errors. Exception in thread "main" java.util.IllegalFormatConversionException: f != java.lang.Integer + others.

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