dot3tech dot3tech - 2 months ago 17
Java Question

Java System.out.print formatting

Here is my code (well, some of it). The question I have is, can I get the first 9 numbers to show with a leading 00 and numbers 10 - 99 with a leading 0.

I have to show all of the 360 monthly payments, but if I don't have all month numbers at the same length, then I end up with an output file that keeps moving to the right and offsetting the look of the output.

System.out.print((x + 1) + " "); // the payment number
System.out.print(formatter.format(monthlyInterest) + " "); // round our interest rate
System.out.print(formatter.format(principleAmt) + " ");
System.out.print(formatter.format(remainderAmt) + " ");
System.out.println();


Results:

8 $951.23 $215.92 $198,301.22
9 $950.19 $216.95 $198,084.26
10 $949.15 $217.99 $197,866.27
11 $948.11 $219.04 $197,647.23


What I want to see is:

008 $951.23 $215.92 $198,301.22
009 $950.19 $216.95 $198,084.26
010 $949.15 $217.99 $197,866.27
011 $948.11 $219.04 $197,647.23


What other code do you need to see from my class that could help?

Answer

Since you're using formatters for the rest of it, just use DecimalFormat:

import java.text.DecimalFormat;

DecimalFormat xFormat = new DecimalFormat("000")
System.out.print(xFormat.format(x + 1) + " ");

Alternative you could do whole job in whole line using printf:

System.out.printf("%03d %s  %s    %s    \n", 
        x + 1, // the payment number
        formatter.format(monthlyInterest),  // round our interest rate
        formatter.format(principleAmt),
        formatter.format(remainderAmt));