Thread: Addition Table.

Thanks kevin for help on the last post, it really helped a lot, but I am now trying to make an addition table with a logarithm at the top, which works. The addition table is actually a multiplication table but I need to convert it to an addition table, i've tried tinkering with some variables but I cannot seem to do it, thanks!

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package mathtables;
 
/**
 *
 * @author student
 */
public class MathTables {
 
 
    public static void main(String[] args) {
 
 
        printCommonLogTable();
        printAdditionTable ();
 
    }
 
    public static void printCommonLogTable () {
        double x = .5;
        while (x < 10.0) {
            System.out.println(x + "  " + Math.log(x));
            x = x + .5;
        }
 
 
    }
    public static void printAdditionTable () {
        {
         int i = 1;
         while (i <= 12) {
             printMultiples (i);
             i = i + 1;
         }
 
        }
        System.out.println("");
 
 
    }
    public static void printMultiples (int n) {
        int i = 1;
        while (i <= 12) {
            System.out.print(n*i + "   ");
            i = i + 1;
        }
        System.out.println("");
    }
 
}

It runs fine, but I am trying to get it to print a addition table not a multiplication table.

run:
0.5  -0.6931471805599453
1.0  0.0
1.5  0.4054651081081644
2.0  0.6931471805599453
2.5  0.9162907318741551
3.0  1.0986122886681098
3.5  1.252762968495368
4.0  1.3862943611198906
4.5  1.5040773967762742
5.0  1.6094379124341003
5.5  1.7047480922384253
6.0  1.791759469228055
6.5  1.8718021769015913
7.0  1.9459101490553132
7.5  2.0149030205422647
8.0  2.0794415416798357
8.5  2.1400661634962708
9.0  2.1972245773362196
9.5  2.2512917986064953
1   2   3   4   5   6   7   8   9   10   11   12   
2   4   6   8   10   12   14   16   18   20   22   24   
3   6   9   12   15   18   21   24   27   30   33   36   
4   8   12   16   20   24   28   32   36   40   44   48   
5   10   15   20   25   30   35   40   45   50   55   60   
6   12   18   24   30   36   42   48   54   60   66   72   
7   14   21   28   35   42   49   56   63   70   77   84   
8   16   24   32   40   48   56   64   72   80   88   96   
9   18   27   36   45   54   63   72   81   90   99   108   
10   20   30   40   50   60   70   80   90   100   110   120   
11   22   33   44   55   66   77   88   99   110   121   132   
12   24   36   48   60   72   84   96   108   120   132   144

Our teacher gave us the printMultiples example in the book, and told us to copy it and transform it into an addition table. I do not know how to do this and I am looking for some help.

Any help would be great.

Thanks Kevin!