program on character

Looks like you'll have to use some tricky manipulation of for loops. A hint: Just because most for...loops use an int to control, doesn't mean you can't use another variable type...like a char. For instance, this loop prints the alphabet:

Hello,
i am new to java and i am not able to do the following program. If anybody can help me it will be very helpful to me. the program is to be done without using array . the program question is

" use a method named design which states a integer argument between 1 and 9 and print the following matter as shown below

ex: for integer argument = 4

Expand|Select|Wrap|Line Numbers

1. abcdcba
2. abc cba
3. ab   ba 
4. a     a
5. ab   ba
6. abc cba
7. abcdcba

If you interpret that little square a an x,y grid with 0,0 in the middle of that square,
and the square has size 2*N-1 (N given by the user) you can loop in both directions
in the range [-N+1, N-1] (e.g. N == 4, loop in the range [-3, 3]).

Ignoring those spaces for the moment you have to print the character
'a'+N-1-abs(x), i.e. the y value has nothing to do with it.

For the spaces, have a look at the upper right quadrant: if abs(y) <= 2-abs(x) you
must print a space instead. (it's simple linear algebra).

You can put two nested loops together (one for x and one for y) and apply the
logic I sketched above in the body of the innermost loop.

kind regards,

Jos