I am new to programming and have a noob question. I am trying to run a test like so...

```
@Test
public void rememberTest()
throws DuplicateException{

    try{
        personA.remember(sighting4);
    }
    catch (Exception e) {
        fail("Failed" + e.getMessage());
    }
    try{
        assertEquals(personA.remember(sighting3), "The list already contains this sighting");
    }
    catch (Exception e) {
        fail("Failed" + e.getMessage());
    }
}

```

the first try/catch compiles but the second one does not. It tells me "'void' type not allowed here. 
" Why can't I use a void? If I can't use a void type, then how would I build my test so that the exception is thrown? 

some background info: rememberTest is a test of the remember method that adds an item to an ArrayList. 

the remember method, in Class Person, is as follows: 

```
public void remember(final Sighting s)
throws DuplicateException
{
    if(lifeList.contains(s)) {
        throw new DuplicateException("The list already contains this sighting");
    }
    lifeList.remember(s); 
}

```

If you need more info please request and I will post it as required.