抛出一个检查异常

Question

I need to modify the given method. 'RunTimeException' is UNchecked... It should throw a checked exception:

public class Main {

    public static void method() {
        throw RuntimeException;
    }    
    
    public static void main(String[] args) {
        try {
            method();
        } catch (RuntimeException e) {
            System.out.println("RuntimeException");
        } catch (Exception e) {
            System.out.println("Exception");
        }
    }
}

I got error:

Compilation error
Main.java:4: error: cannot find symbol
       throw RuntimeException;
             ^
  symbol:   variable RuntimeException
  location: class Main
1 error

Answer 1

I strongly suggest reading tutorial here https://docs.oracle.com/javase/tutorial/essential/exceptions/runtime.html .

Here is the excerpt which relates to your queston

Generally speaking, do not throw a RuntimeException or create a subclass of RuntimeException simply because you don't want to be bothered with specifying the exceptions your methods can throw.Here's the bottom line guideline: If a client can reasonably be expected to recover from an exception, make it a checked exception. If. a client cannot do anything to recover from the exception, make it an unchecked exception.