小编Kar*_*rim的帖子

我首先要说的是我是一个Java(/编程)新手,这是我在网站上的第一个问题.

刚学会了如何使用递归节点在Java中创建有序列表.一切都很简单,直到我遇到这个练习,要求我编写一个方法,将每个节点中包含的任何值加倍.这是我试写的代码:

public class ListaInteri<E extends Integer>
{
    private NodoLista inizio;

    // Private inner class each instance of these has a raw type variable and a
    // ref
    // to next node in the list
    private class NodoLista
    {
        E dato;
        NodoLista pros;
    }

    // method that adds whatever is meant by x to the begging of the list

    public void aggiungi(E x)
    {
        NodoLista nodo = new NodoLista();
        nodo.dato = x;
        if (inizio != null)
            nodo.pros = inizio;
        inizio …