Print Java arrays in columns

Question

I\'m trying to format two arrays in Java to print something like this:

Inventory Number      Books                          Prices
--------------------------         


        

Answer 1

You should look at format:

System.out.format("%15.2f", booksPrices[i]);   

which would give 15 slots, and pad it with spaces if needed.

However, I noticed that you're not right-justifying your numbers, in which case you want left justification on the books field:

System.out.printf("%-30s", books[i]);

Here's a working snippet example:

String books[] = {"This", "That", "The Other Longer One", "Fourth One"};
double booksPrices[] = {45.99, 89.34, 12.23, 1000.3};
System.out.printf("%-20s%-30s%s%n", "Inventory Number", "Books", "Prices");
for (int i=0;i

resulting in:

Inventory Number    Books                         Prices
0                   This                          $45.99
1                   That                          $89.34
2                   The Other Longer One          $12.23
3                   Fourth One                    $1000.30