Java开发网 - 方法和函数问题

Topic: 方法和函数问题

1.方法和函数问题	Copy to clipboard
Posted by: sunyboy001 Posted on: 2005-11-04 12:11 这个是我一直都想问的问题，在各种教材中也没能找到答案，除了必须的main方法外，我想知道什么时候需要用到函数，什么时候要用到方法？还有方法和函数在程序中各起到什么作用，可以达到什么样的目的？期待各位老师解答，不盛感激！

2.Re:方法和函数问题 [Re: sunyboy001]	Copy to clipboard
Posted by: hualee Posted on: 2005-11-04 12:26 这个问题真的不好怎么回答，我也不是很懂滴，希望高人来帮忙解决

3.Re:方法和函数问题 [Re: sunyboy001]	Copy to clipboard
Posted by: bluecrystal Posted on: 2005-11-04 13:06 函数和方法这两个概念在程序设计语言中没有严格区分通常都仅仅是个习惯的叫法问题，只要不引起歧义即可

4.Re:方法和函数问题 [Re: sunyboy001]	Copy to clipboard
Posted by: sunyboy001 Posted on: 2005-11-04 13:46 哦，谢谢。是不是函数名必须和类名相同？不过还是很想清楚的明白方法和函数在程序中各起到什么作用

5.Re:方法和函数问题 [Re: sunyboy001]

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Posted by: ranchgirl
Posted on: 2005-11-04 15:24

subroutine, procedure, function, method

They are basically the same thing, used in different languages, in computer science history.

Method is usually used in OO languages, such as Java.
Function is used in c/c++/Pascal.
Procedure is used In Pascal, funtion returns a value, procedure does not.
Subroutine is used in FORTRAN/BASIC.

I just give you some examples, not a complete list.

方法和函数在程序中都起到什么作用: Make code reusable.

Subroutine is a big invention in FORTRAN language! We don't need to write the same piece of code again and again and again!!!!!!!!!!!!!!!!!!!!

It seems a simple commonplace to you and me. However, it was a great invention in computer science history!

6.Re:方法和函数问题 [Re: sunyboy001]	Copy to clipboard
Posted by: sunyboy001 Posted on: 2005-11-04 16:21 呵呵---- 谢谢了

7.Re:方法和函数问题 [Re: sunyboy001]	Copy to clipboard
Posted by: q_yuan Posted on: 2005-11-05 09:59 And I have some palpability! Thank you!

8.Re:方法和函数问题 [Re: sunyboy001]

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Posted by: Infinite
Posted on: 2005-11-06 03:51

只有构造函数的函数名要求和类名相同
方法和函数是同一个概念
至于起到什么作用，要看你定义的函数了。
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sunyboy001 wrote:
哦，谢谢。

是不是函数名必须和类名相同？

不过还是很想清楚的明白方法和函数在程序中各起到什么作用