When do we rethrow exception in catch block with different exception
Hi,
When do we rethrow exception in catch block with different exception?
Say
class ExceptionClass
{
public static void main(String[] args){
try {
System.out.println(9/0);
}
catch(ArithmeticException e) {
throw new NullPointerException();
}
}
}
I wonder whether we can do like above and in what situations we do like above?
please advise
When do we rethrow exception in catch block with different exception?
Say
class ExceptionClass
{
public static void main(String[] args){
try {
System.out.println(9/0);
}
catch(ArithmeticException e) {
throw new NullPointerException();
}
}
}
I wonder whether we can do like above and in what situations we do like above?
please advise
ASKER CERTIFIED SOLUTION
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exactly what I said:
public void doSomethingDangerous() throws DataAccessException{
try{
...something that can cause a SQLException
}catch(SQLException e){
throw new DataAccessException(e);
}
}
public void doSomethingDangerous() throws DataAccessException{
try{
...something that can cause a SQLException
}catch(SQLException e){
throw new DataAccessException(e);
}
}
ASKER
What's dataaccessexceptiob?I never heard? Is it custom exception?
Ok, lets call it Guddi9Exception.
ASKER
If you have a method that declares a data access exception for example in its throws clause.
If the body of the method catches a SQLException, you will probably want to wrap that in data access exception before throwing it out to the caller. You would not want the caller to handle SQLException.
we would want caller to handle data access exception instead right?
Yes. The caller may decide the handle it or let it bubble up the call stack and simply do nothing
ASKER