Pattern9.java

 
public class Pattern9 {
    public static void main(String[] args) {
//     *    
//    ***   
//   *****  
//  ******* 
// *********
// *********
//  ******* 
//   *****  
//    ***   
//     *  
        int row=5;
        for (int i = 1; i <= row; i++) {
            int first = row - i + 1;
            int last = row + i - 1;
            for (int j = 1; j <= (row * 2) - 1; j++) {

                if (j >= first && j <= last ) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
        for (int i = row; i >= 1; i--) {
            int first = row - i + 1;
            int last = row + i - 1;
            for (int j = 1; j <= (row * 2) - 1; j++) {

                if (j >= first && j <= last) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }
}