問題詳情
212.Given: 3. import java.util.*； 4. public class Hancock{ 5. //insert code here 6. list.add("foo")； 7. } 8. } Which two code fragments, inserted independently at line 5, will compile without warnings? (Choose two.)
(A) public void addStrings(List list){
(B) public void addStrings(List＜String＞ list){
(C) public void addStrings(List＜? super String＞ list){
(D) public void addStrings(List＜? extends String＞ list){
參考答案