Catching Multiple Exceptions

Before Java 7, we used to catch multiple exceptions one by one as shown below.

catch (IOException ex) {
     logger.error(ex);
     throw new MyException(ex.getMessage());
catch (SQLException ex) {
     logger.error(ex);
     throw new MyException(ex.getMessage());
}

In Java 7, we can catch both these exceptions in a single catch block as:

catch(IOException | SQLException ex){
     logger.error(ex);
     throw new MyException(ex.getMessage());
}

If a catch block handles multiple exception, you can separate them using a pipe (|) and in this case exception parameter (ex) is final, so you can’t change it. The byte code generated by this feature is smaller and reduce code redundancy.