import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class MainClass {
public static void main(String[] a) {
List l1 = Arrays.asList(new String[] { "A", "B" ,"C"});
List l2 = Arrays.asList(new String[] { "A", "C", "D" });
Collections.copy(l1, l2); // works
Collections.copy(l2, l1); //
System.out.println(l1);
System.out.println(l2);
}
}
[A, C, D]
[A, C, D]