菱形

for (int a=0; a<10; a++)
				          {
				              for (int b=8; b>=a; b--)
				             {
				                 System.out.print(" ");
				             }
				             for (int c=0; c<=a; c++)
				             {
				                 System.out.print("*");
				             }
				             System.out.println();
				         }
				         for (int d=0; d<10; d++)
				         {
				             for (int e=0; e<=d; e++)
				             {
				                 System.out.print(" ");
				             }
				             for (int f=8; f>=d; f--)
                                            {
                                                 System.out.print("* ");
                                             }
				             System.out.println();
				         }