Java开发网 - 请教怎么用switch语句改写if语句

Topic: 请教怎么用switch语句改写if语句

1.请教怎么用switch语句改写if语句	Copy to clipboard
Posted by: snaileagle Posted on: 2005-08-02 17:27 public void actionPerformed(ActionEvent e) { if(e.getSource()==jMS){//jMS 菜单名 test(); } if(e.getSource()==jMK){//jMK 菜单名 sicenec(); } } 怎么用switch语句改写上面的语句啊

2.Re:请教怎么用switch语句改写if语句 [Re: snaileagle]	Copy to clipboard
Posted by: why Posted on: 2005-08-02 18:38 switch only works with integer expression or enumerated type so I don't think it is appropiate to be used here.

3.Re:请教怎么用switch语句改写if语句 [Re: snaileagle]	Copy to clipboard
Posted by: snaileagle Posted on: 2005-08-02 18:44 oh , I see ! 看来只有用很多的if语句了，那样的话，程序代码可能会很难看。

4.Re:请教怎么用switch语句改写if语句 [Re: snaileagle]

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Posted by: why
Posted on: 2005-08-02 20:00

snaileagle wrote:
oh , I see !
看来只有用很多的if语句了，那样的话，程序代码可能会很难看。

What's the difference between


if (selector==case1) {
  doCase1();
} else if (selector==case2) { 
  doCase2();
...
} else if (selector==caseN) { 
  doCaseN();
} else {
  doElse();
}

and


select selector {
  case CASE_ENUM_1 :
    doCase1();
    break;
  case CASE_ENUM_2 :
    doCase2();
    break;
 ...
  case CASE_ENUM_N:
    doCaseN();
    break;
  default :
   doElse();
}

很难看??

5.Re:请教怎么用switch语句改写if语句 [Re: snaileagle]	Copy to clipboard
Posted by: snaileagle Posted on: 2005-08-02 20:52 谢谢，经过你这么比较，呵呵，就不那么觉得了。