java throw异常找不到符号(java throw exception cannot find symbol)

我试图从方法抛出异常，但当我编译下面的代码

class launcher{ public static void main(String[] args){ try{ getError(); System.out.println("Line: try block"); }catch(myException e){ System.out.println("Line: catch block"); }finally{ System.out.println("Line: finally block"); } System.out.println("Line: EOF main"); } static void getError() throws myException{ throw new myException(); } }

编译错误

launcher.java:14：错误：找不到符号static void getError（）throws ^ myException {

symbol：类myException

位置：类启动器

它说了些什么，它无法理解什么是myException

im trying to throw exception from method,but when i compile the below code

class launcher{ public static void main(String[] args){ try{ getError(); System.out.println("Line: try block"); }catch(myException e){ System.out.println("Line: catch block"); }finally{ System.out.println("Line: finally block"); } System.out.println("Line: EOF main"); } static void getError() throws myException{ throw new myException(); } }

compile error

launcher.java:14: error: cannot find symbol static void getError() throws ^myException{

symbol: class myException

location: class launcher

it says something, it can't understand what is myException

最满意答案

问题原因和解决方案

问题是，您没有将Exception导入launcher类。 Exception是class es，因此需要声明为典型类。

大问题

您使用小写字母启动类名称，这使您的类不可读。 应该调用您的类： Launcher （或更好的Test ）和MyException而不是myException 。

您可以创建自己的例外。 以下是MyException的声明，您可能会发现它有用：

MyException

public class MyException extends RuntimeException { public MyException() { super(); } }

然后导入你的新课程，你就可以抛出它。

Problem reason and solution

The problem is, that you haven't imported your Exception to the launcher class. Exceptions are classes so need to be declared as a typical class.

Huge problem

You start class names with lowercase letters which makes your class non-readable. Your classes should be called: Launcher (or better Test) and MyException instead of myException.

You can create your own Exceptions. The following is a declaration of MyException which you might find helpful:

MyException

public class MyException extends RuntimeException { public MyException() { super(); } }

Then import your new class and you'll be able to throw it.