Intellij：通過IDE創建一個隨機數用作錯誤號/錯誤代碼？

Question

在這裏看到：The proper way to do exception handling

說這個代碼：

function changeBookAuthor(int $id, string $newName){ 
    if(!$newName){ 
    throw new MyAppException('No author name was provided'); 
    } 

    $book = Books::find($id); 

    if(!$book){ 
    throw new MyAppException('The provided book id could not be found'); 
    } 
//.. 
} 

我想改變這種狀況到：

function changeBookAuthor(int $id, string $newName){ 
     if(!$newName){ 
     throw new MyAppException('No author name was provided', <SOMEVERYRANDOMNUMBER>); 
     } 

     $book = Books::find($id); 

     if(!$book){ 
     throw new MyAppException('The provided book id could not be found', <SOMEVERYRANDOMNUMBER>); 
     } 
    //.. 
    } 

的IntelliJ能幫助我在選擇隨機數？

Answer 1

因爲你使用IntelliJ，所以我很喜歡你使用Java。

我環顧四周網上，我發現，您可以生成一個隨機數是這樣的：

import java.util.Random; 

Random random = new Random(); 
int randomInt = random.nextInt(10); 

這會產生0到9之間的隨機數

您的最終代碼如下：

import java.util.Random; 

function changeBookAuthor(int $id, string $newName){ 
    if(!$newName){ 

    Random random = new Random(); 
    int randomInt = random.nextInt(10); 

    throw new MyAppException('No author name was provided', randomInt); 
    } 

    $book = Books::find($id); 

    if(!$book){ 

    Random random = new Random(); 
    int randomInt = random.nextInt(10); 

    throw new MyAppException('The provided book id could not be found', randomINT); 
    } 
//.. 
} 

下面是網站，我從得到的信息：http://alvinalexander.com/blog/post/java/create-some-random-numbers

Answer 2

我個人使用不同類型的異常而不是異常代碼。

例如：

try{ 
    ... 
} catch (PDOException e1){ 
    // Show a message that we could not do SQL work 
} catch (NumberFormatException e2){ 
    // Show a message that input was not a valid number 
} catch (Exception e){ 
    // I'm not sure what was wrong but definitely there was some thing wrong 
} 

但是，如果你仍然想的隨機數，去https://www.random.org，還有一些數生成器，複製值，並將其定義爲在代碼中的常數（我猜您正在使用PHP ）