javamulti-table

How can I format column spacing for Multi Table?

I'm currently trying to use java to make a multitable with the following output:

    0  1  2  3  4  5  6  7  8  9
 +------------------------------
0|  0  0  0  0  0  0  0  0  0  0
1|  0  1  2  3  4  5  6  7  8  9
2|  0  2  4  6  8 10 12 14 16 18
3|  0  3  6  9 12 15 18 21 24 27
4|  0  4  8 12 16 20 24 28 32 36
5|  0  5 10 15 20 25 30 35 40 45
6|  0  6 12 18 24 30 36 42 48 54
7|  0  7 14 21 28 35 42 49 56 63
8|  0  8 16 24 32 40 48 56 64 72
9|  0  9 18 27 36 45 54 63 72 81

However, instead of the result above, i got this:

   0   1   2   3   4   5   6   7   8   9
 +-------------------------------------------
0| 0  0  0  0  0  0  0  0  0  0
1| 0  1  2  3  4  5  6  7  8  9
2| 0  2  4  6  8  10  12  14  16  18
3| 0  3  6  9  12  15  18  21  24  27
4| 0  4  8  12  16  20  24  28  32  36
5| 0  5  10  15  20  25  30  35  40  45
6| 0  6  12  18  24  30  36  42  48  54
7| 0  7  14  21  28  35  42  49  56  63
8| 0  8  16  24  32  40  48  56  64  72
9| 0  9  18  27  36  45  54  63  72  81

Therefore, i'd like to know is there any way the fix the problem? Thanks.

Here's the code.

import java.util.*;
public class MultiTable 
{
    public static void main(String[] args) 
    {
        int x = 9;
        System.out.print("   ");
        for(int k = 0; k<=x ;k++ ) {
            System.out.print( k + "   ");
        }

       System.out.println("\n +-------------------------------------------");
        for(int i = 0 ;i<=x ;i++) {
             System.out.print(i+ "| ");
            for(int j=0;j<=x ;j++) {
             System.out.print(j*i + "  ");
            }
            System.out.println();
        }
        System.out.println("\n"); 
        System.out.println("\n\n");
    }
}

Thanks.

Solution

  • Print formatted strings instead of printing it as-is.

    Either you can print the formatted string directly to the output using System.out.printf()

    or

    You can format a string using String.format() first, then print it using println.

    In your case, you need to force the integers to be at least 2 characters long. If the integer has too few digits, you can pad it in spaces. This is how you can do it:

    int number = 1;

// printf approach
System.out.printf("%3d", number);

// Formatted string approach
String formatted = String.format("%3d", number);
System.out.print(formatted);

    In the format, you can see %3d. It means:

    You can read more about formatters in Java's official docs