This should do it:
public class Tower {
public static void main(String[] args) {
System.out.println(" 1 ");
System.out.println(" 1 2 1 ");
System.out.println(" 1 2 3 2 1 ");
System.out.println(" 1 2 3 4 3 2 1 ");
System.out.println(" 1 2 3 4 5 4 3 2 1 ");
System.out.println(" 1 2 3 4 4 4 4 4 3 2 1 ");
System.out.println(" 1 2 3 3 3 3 3 3 3 3 3 2 1 ");
System.out.println(" 1 2 2 2 2 2 2 2 2 2 2 2 2 2 1 ");
System.out.println(" 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ");
}
}