import java.util.ArrayList;
import java.util.List;
public class Test {
public static void main(String[] args) {
List<String> list=new ArrayList<String>();
list.add("1");
Change(list);
System.out.println(list.get(0));
}
private static void Change(List<String> list) {
List<String> newList=new ArrayList<>();
newList.add("2");
list=newList;
}
}
输出结果是:1