Odd Stars Diamond With Single Mid Max (Using Only Three FOR Loops)

Odd Stars Diamond 1

/* Program to print below pattern:-
  *
 ***
*****
 ***
  *
  
  */
  
  
public class Demo {
	
	public static void main(String args[]) {
		
	int n =3;
	
	pattern2(n);
  
  }
  
  public static void pattern2(int n) {
		
		int col = 0;
		
    // For rows
    for (int i=0; i<2*n -1; i++){
			
      // For spaces
			col = i<n? n-i-1: i-n+1;
			for (int j = 0; j<col; j++){
				
				System.out.print(" ");
			}
			
      // Stars before mid increasing oddly. i.e. 2*i +1
      //After mid, decreasing oddly. i.e. max stars at mid  - 2(i-n-1)  ==  2n - 1 - 2(i-n-1) == 4n - 2i - 1
			col = i<n? 2*i+1  : 4*n - 2*i - 3;  
      
      // For Stars
			for (int j = 0; j<col; j++){
				
				System.out.print("*");
			}
			
			System.out.println("");
		}
	}
  
  }