public class ChristmasTree
{  static final int LINE = 8;
   public static void main(String[] args)
   {  // static final int LINE = 8;   Wrong place for static var!
      for(int i = 1; i <= LINE; i++)
      {  for(int j = 0; j < LINE - i; j++)
            System.out.print(" ");
         for(int m = 0; m < (2*i - 1); m++)
            System.out.print("X");
         System.out.println();
      }
   }
} // Chung