Catching versus Throwing Exceptions in Java [duplicate]

Answer 1

Basically is something like this:

1. throws - the function that throws and exception tells it's parent function that somenthing it's wrong. For instance you have a createFunction() throws SQLException where you are trying to insert 100 item in a database but the creation of number 98 fails. The createFunction() is used in your main() who receives this SQLException;

2. try/catch - the main() knows that createFunction() is suppose to throw an SQLException if something goes wrong so when it implements it puts it in a try/catch block, this way if an SQLException is actually thrown you can execute a fall-back plan in the catch block such as a database rollback.

   Actual code of what I just said:

    createFunction(Connection connection) throws SQLException {
         //insert items in the database
    }
   
    main(){
   
       try{
        createFunction(connection);
       }
       catch (SQLException e){
         connection.rollback();
       }
    }