From JQPlus : QuestionID 957711112180

[Angela Narain]

Question ID : 957711112180
interface I1
{
void m1() throws IOException
}
interface I2
{
void m1() throws SQLException
}
What methods have to be implemented by a class that says it implements I1 and I2 ?
OPTIONS :
1. Both, public void m1() throws SQLException, and public void m1() throws IOException
2. public void m1() throws IOException
3. The class cannot implement both the interfaces as they have conflicting methods
4. public void m1() throws SQLException, IOException
5.None of the above
Correct answer : 5.
The explanation mentions, "that the overiding method must have a throws clause
that is compatible with ALL the overridden declarations .So public void m1() satifies both the declarations"
But i fail to understand the meaning !

[Thomas Paul]

You can not declare that you throw an exception that isn't in the interface. If you decalre that you throw SQLException, that isn't in I1. If you decalre that you throw IOException, that isn't in I2. Therefore you must not declare that you throw any exceptions. Programmatically, that will mean that any exceptions generated in your code will have to be handled.
------------------
Tom - SCJP --- Co-Moderator of the Programmer Certification Forums

[swati bannore]

A rather very basic doubt,
Can we throw more that one exception in a throws clause..?
public void m1() throws IOException,Exception
thanx

[Muhammad Farooq]

Swati,
You can throw more than one exception in the throws clause of the method, just check wether the method is overriding any method, if yes you can not throw any checked exception not thrown in overriden method.
--Farooq