问题

我正在尝试简单地使一个类扩展异常类，我已经看过多个相关的视频，代码设置完全相同，但我只是有一个不同的类名。

public class CategoryException extends Exception {

   public CategoryException()
   {
   super("抛出了一个类别异常。");
   }//end method
   
   public CategoryException(String messagePassed)
   {
   super(messagePassed);
   }//end method
   
}

我只想将这个类传递给我的主代码，但是这甚至无法编译，我非常困惑为什么它会说超类没有参数，但在我看到的所有内容中，这就是设置的方式。

CategoryException.java:5: 错误: 无法将类 Exception 中的构造函数应用于给定类型；
   super("抛出了一个类别异常。");
   ^
  需要: 无参数
  找到:    String
  原因: 实际参数列表和形式参数列表的长度不同
CategoryException.java:10: 错误: 无法将类 Exception 中的构造函数应用于给定类型；
   super(messagePassed);
   ^
  需要: 无参数
  找到:    String
  原因: 实际参数列表和形式参数列表的长度不同
2 错误

感谢您的帮助，因为我对如何解决这个问题感到非常困惑，我知道我一定很愚蠢，没有意识到问题出在哪里。

<details>
<summary>英文:</summary>

I&#39;m trying to simply make a class extend the class exception and i&#39;ve seen multiple videos on it with the code setup the exact same way but I just have a different class name

public class CategoryException extends Exception {

public CategoryException()
{
super("A category exception was thrown.");
}//end method

public CategoryException(String messagePassed)
{
super(messagePassed);
}//end method

}

All I want to do is pass this to my main code but this won't even compile and i'm very confused on why it it is saying that super has has no parameters but in the everything that i've seen this is how its supposed to be set up

CategoryException.java:5: error: constructor Exception in class Exception cannot be applied to given types;
super("A category exception was thrown.");
^
required: no arguments
found: String
reason: actual and formal argument lists differ in length
CategoryException.java:10: error: constructor Exception in class Exception cannot be applied to given types;
super(messagePassed);
^
required: no arguments
found: String
reason: actual and formal argument lists differ in length
2 errors

thank you for any help as im very confused on what to do to get by this and I know i must be stupid or something to not realize it.

</details>


# 答案1
**得分**: 0

这可能是你所寻找的：

```java
public class Main {
    public static void main(String[] args) {
        try {
            throw new CategoryException();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

class CategoryException extends Exception {

    public CategoryException() {
        super("已抛出类别异常。");
    }

    public CategoryException(String messagePassed) {
        super(messagePassed);
    }
}

在这个例子中，你可以验证它的工作原理，主方法捕获了你的CategoryException并打印了异常消息 "已抛出类别异常。"。

public class Main {
    public static void main(String []args) {
        try {
            throw new CategoryException();
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

class CategoryException extends Exception {

    public CategoryException() {
        super("A category exception was thrown.");
    }

    public CategoryException(String messagePassed) {
        super(messagePassed);
    }
}