Thread: Formatting 2d Array Output

I was wondering if there is a way to format the output of an array so that each indexed item has a discriptor and formatted in a certian way?

Example:

I have an array with 2 rows and 2 columns filled with numbers = double[][] numberArray = new double[2][2];

sample data
[0][0] = 1
[0][1] = 1
[1][0] = 2
[1][1] = 2

When I run my for loops my output statement is:

for (int i=0; i<ROWS; i++)
{
for (int j=0; j<COLUMNS; j++)
{
System.out.print(" " + numberArray[i][j]);
}

This will output something like this:
1.0 1.0
2.0 2.0

I would like to format the output to look like this:

Day 1 Earnings $ 1.00
Day 2 Earnings $ 2.00

If I try the System.out.printf(.......); I can only put one discriptor and one format for both columns. I would like to format each column seperately from each other.

Could you please point me in the right direction?

Thanks,

DS

Please post the code you are having problems with. The printf() method should be able to print multiple values on multiple lines.

The code that I need help with is:

for (int i=0; i<ROWS; i++)
{
for (int j=0; j<COLUMNS; j++)
{
System.out.print(" " + numberArray[i][j]);
}

The problem is when I use the printf to format I don't know how to insert a discriptor in front of each column and format the numbers that are stored in the array.

Here is an example:

System.out.printf("Day %5.0f", numberArray[i][j]);

it will output this:

Day 1 Day 2

I would like to make a format statement that would allow me to format for the [0][0] and then another format for [0][1] and all the way down the array.

Thanks,

DS

Something like this?
System.out.printf("Day %5.0f <Descriptor here> %5.0f\n", numberArray[i][j], numberArray[i][j+1]);

Thank you so much.

I put in what you had up top and it would print the first line perfectly but it threw an error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
at arraywork.ArrayWork.main(ArrayWork.java:36)
Java Result: 1

I added a -1 behind the COLUMNS and now it works perfectly.
Thank you

My code was not intended to be usable as posted. It was just an idea of how to do it.