java中在普通的类文件中怎么不能使用Date类和Graphics类，如何才能正确使用？

[sunbetter]

程序如下：
class A{
.
.
.
public void paint(Graphics g){
Date now=new Date();
g.drawString(now.getHours()+":"+now.getMinutes()+":"+now.getSeconds(),5,10);
}
.
.
.
}

错误提示:
"Untitled1.java": cannot resolve symbol: class Graphics in class untitled1.Clock at line 45, column 21
"Untitled1.java": cannot resolve symbol: class Date in class untitled1.Clock at line 46, column 5
"Untitled1.java": cannot resolve symbol: class Date in class untitled1.Clock at line 46, column 19

[trumplet]

import java.awt.*;
import java.util.*;

[meconsea]

import .....;

import .........;

[XqYuan]

另外你的文件名好像不好吧