DiamondPattern.java

import java.util.*;  
public class DiamondPattern  
{  
    public static void main(String args[])  
    {  
        int n,i,j,space = 1;  
        System.out.print("Enter the number of rows: ");  
        Scanner sc=new Scanner(System.in);  
        n=sc.nextInt();  
        space=n-1;  
        for (j=1;j<=n;j++)  
        {  
            for (i=1;i<=space;i++)  
            {  
                System.out.print(" ");  
            }  
            space--;  
            for (i = 1; i <= 2 * j - 1; i++)  
            {  
                System.out.print("*");  
            }     
            System.out.println("");  
        }  
        space = 1;  
        for (j = 1; j<= n - 1; j++)  
        {  
            for (i = 1; i<= space; i++)  
            {  
                System.out.print(" ");  
            }  
            space++;  
            for (i = 1; i<= 2 * (n - j) - 1; i++)  
            {  
                System.out.print("*");  
            }  
            System.out.println("");  
        } 
    }  
}