Topic: 求助(为什么在paint(Graphics g)中还要以一个abstract类构建对象) |
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| 1.求助(为什么在paint(Graphics g)中还要以一个abstract类构建对象) | Copy to clipboard |
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Posted by: binghuo007 Posted on: 2006-03-12 22:03 Graphics类是一个abstract类,可为什么在paint(Graphics g)中还要以Graphics构建对象然后作为参数传入呢? | |
| 2.Re:求助(为什么在paint(Graphics g)中还要以一个abstract类构建对象) [Re: binghuo007] | Copy to clipboard |
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Posted by: rr253 Posted on: 2006-03-15 12:09 graphics是抽象类阿 但是你传进去的变量是继承了它的阿 继承关系来看的话你传进去的也是graphics阿 | |
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