Collections and Generics

Question : 36 of 53

Marks: +1, -0

Given:

1. public void addStrings(List list) {
2.   list.add(”foo”);
3.   list.add(”bar”);
4. }

What must you change in this method to compile without warnings?

add this code after line 1: list = (List < String > ) list;
change lines 2 and 3 to: list.add < String > (”foo”); list.add < String > (”bar”);
change the method signature on line 1 to: public void addStrings(List < ? extends String > list) {
change the method signature on line 1 to: public void addStrings(List < ? super String > list) {
No changes are necessary. This method compiles without warnings.

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