Using printf to Print Columns

Question

I want to print columns using the formatting specifier with printf in Java. However I can't seem to get this right. I want the numbers to be aligned perfectly.

This is what I want to get: enter image description here

This is what I am getting: enter image description here

import java.util.Scanner;

public class LabTimeTable{

   public static void main(String [] args){
   Scanner input = new Scanner(System.in);

   System.out.println("Time Table:");

   System.out.print("Number (1-10): ");
   int number1 = input.nextInt();
   int number2 = (number1+1);

      for(int i = 1; i < 11; i++){

         System.out.printf("%2d * %d = %d", i, number1, (number1*i));
         System.out.printf("%12d * %3d = %d", i, number2, (number2*i));
         System.out.println();

      }


   }

}

MZ97 · Accepted Answer · 2020-02-23 22:49:45Z

1

I would recommend you to use something like this:

System.out.printf("%2d * %d = %-10d", i, number1, (number1*i));
System.out.printf("%d * %3d = %d", i, number2, (number2*i));
System.out.println();

Here I am using -10d, which allocates 10 letter spaces for the last number in the first column, it includes the number too. Also notice, I removed 12d from second column, because it will make even greater space between these two columns.

edited Feb 23, 2020 at 22:49

answered Feb 23, 2020 at 22:44

MZ97

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