import java.util.*;

class StringAddress {
private String s;
public StringAddress(String s) { this.s = s; }
public String toString() {
return super.toString() + " " + s;
}
}

public class FillingLists {
public static void main(String[] args) {
List<StringAddress> list= new ArrayList<StringAddress>(
Collections.nCopies(4, new StringAddress("Hello")));
System.out.println(list);
Collections.fill(list, new StringAddress("World!"));
System.out.println(list);
}
} /* Output: (Sample)
[StringAddress@82ba41 Hello, StringAddress@82ba41 Hello, StringAddress@82ba41 Hello, StringAddress@82ba41 Hello]
[StringAddress@923e30 World!, StringAddress@923e30 World!, StringAddress@923e30 World!, StringAddress@923e30 World!]
*///:~

运行后显示Exception in thread "main" java.lang.Error: 无法解析的编译问题：
类型 List 不是通用的；不能使用参数 <StringAddress> 将它参数化

at FillingLists.main(FillingLists.java:15)

请问我该怎么办？