Stars program

I am taking computer science at school and our home work this weekend was to finish a program we have been working on the past week which was to program something that would print "*" in different patterns I am trying to finish the last one and have not been able to figure out an equation that will work. I need to print a diamond. so far I have gotten the top part to print by doing the following

public class stars
{
public static void main (String[]args)
{
final int MAX_ROWS=10;


for (int row=1; row<=(MAX_ROWS-5); row++)
{
for (int star=1; star<=((MAX_ROWS-5)-row); star++)
System.out.print(' ');
for (int star=1; star<=((row*2)-1); star++)
System.out.print("*");
System.out.println();
}

}
}

I have tried invertinf the equation and changing the number star is equal to along with row and if I am adding or subtracting a star. Any advice on how to get the bottom to print would be apprieciated.

Have you considered using spaces instead of stars, and using stars where you have used spaces for the bottom part?

So isn't a diamond just a centered collection of rows that contain first a growing number of * and then a diminishing number of stars?

So, we can assume several things from this. We're doing something over and over, so: Loops
You got that far.

Also, we're doing two things over and over, rows, and columns. This implies a nested loop (a loop in a loop).

Finally, we have two behaviors - a growing number of stars, followed by a shrinking number of stars. One way to do this is two sets of two loops, one that grows, and one that shrinks.