What is the general rule of thumbs for creating an Exception in Java?

Question

I have been in both situations:

• Creating too many custom Exceptions
• Using too many general Exception class

In both cases the project s

Answer 1

Don't eat exceptions, throw them https://stackoverflow.com/a/921583/1097600

Avoid creating your own exception. Use the below ones that are already there.

IllegalStateException
UnsupportedOperationException
IllegalArgumentException
NoSuchElementException
NullPointerException

Throw unchecked exceptions.

Example

public void validate(MyObject myObjectInstance) {
    if (!myObjectList.contains(myObjectInstance))
        throw new NoSuchElementException("object not present in list");
}