Why is it necessary to rethrow exceptions?

Question

Java

Do I understand correctly that repeated exceptions take us to a higher level? But to a higher level of what if it still remains at the Exception level?

catch(Exception e){
System.err.println("Было возбуждено исключение");
throw e; 
}

Answer 1

Rethrowing an exception allows your code to react to the exception, not to swallow it, but to forward it to the calling code so that it can also react to it somehow.

Answer 2

to a higher level,

call tree. Just do not forget in the method where you have this written

catch(Exception e){
System.err.println("An exception was thrown");
throw e;
}

append throws [your exception class]