CSS实现onMouseOver、onMouseOut效果和层套菜单

public class PrintJJTable
{
public static void main(String[] args)
{
PrintJJTable t = new PrintJJTable();
t.Display();
}

public void Display()
{
for(int i=1; i<=9; i++)
{
System.out.print("\t" + i);
}

System.out.print("\n    * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *");

for(int i=1; i<=9; i++)
{
System.out.print("\n" + i + "   *\t");

for(int j=1; j<=9; j++)
{
System.out.print(i*j + "\t");
}
}
}
}

1	2	3	4	5	6	7	8	9
* * * * * * * * * * * * * * * * * * * *
1   *	1	2	3	4	5	6	7	8	9
2   *	2	4	6	8	10	12	14	16	18
3   *	3	6	9	12	15	18	21	24	27
4   *	4	8	12	16	20	24	28	32	36
5   *	5	10	15	20	25	30	35	40	45
6   *	6	12	18	24	30	36	42	48	54
7   *	7	14	21	28	35	42	49	56	63
8   *	8	16	24	32	40	48	56	64	72
9   *	9	18	27	36	45	54	63	72	81