About Question enthuware.ocpjp.v8.3.1922 :
Posted: Sun May 12, 2019 10:03 am
Hi - Re the explanation for why the fourth option does not compile:
"Since the variable names is of type List<String>, its addAll method can only accept objects whose declared type is a String. Declared type of oa[0] and oa[1] is Object and therefore it will not compile. The compiler doesn't know that these elements actually hold Strings"
I think this is a bit off in that the method need a List<String>, not just individual Strings, so even if the elements passed here were typed to String it still would not compile.
"Since the variable names is of type List<String>, its addAll method can only accept objects whose declared type is a String. Declared type of oa[0] and oa[1] is Object and therefore it will not compile. The compiler doesn't know that these elements actually hold Strings"
I think this is a bit off in that the method need a List<String>, not just individual Strings, so even if the elements passed here were typed to String it still would not compile.