Java实现用*打印金字塔(经典笔试题)

 public static void main(String[] args){
        {
            int i,j,k,n;
            n=5;//打印5层
            for(i=1;i<=n;i++)
            {
                for(j=1;j<=n-i;j++)
                    System.out.print(" ");
                for(k=1;k<=2*i-1;k++)
                   System.out.printf("*");
                   System.out.printf("\n");
            }
        }
    }