How to remove all null elements from a ArrayList or String Array?

Question

I try with a loop like that

// ArrayList tourists

for (Tourist t : tourists) {
    if (t != null) {     
        t.setId(idForm); 
    }   
}

Answer 1

Similar to @Lithium answer but does not throw a "List may not contain type null" error:

   list.removeAll(Collections.singleton(null));