A question about Linked List

Question

Im copying an array of objects to the linked list from a student class that i already made, but in the 5th line , the following error is showing : (" cannot find symbol - class E ")

Why is that?

import java.util.*;

public class StudentLinkedList
{

    private List<E[]> studentLL = new LinkedList<E[]>();


    public StudentLinkedList(Student[] st)
    {
        for(int i = 0; i < st.length; i++)
        {
            studentLL.add(st[i]);
        }

    }
}

Answer 1

You probably wanted to write:

private List<Student> studentLL = new LinkedList<Student>();

instead.

When declaring such a field, you specify the type of the elements of a list. The type you have specified is E , but the compiler doesn't know anything called that.

Answer 2

尝试将LinkedList实例更改为private List<Student> studentLL= new LinkedList<Student>();