我正在尝试为将 txt 文件的内容保存到单链表中的程序编写代码，txt 文件中的每一行都代表一个对象。我使用扫描仪从文件中读取，但我不知道如何获取列表中的单词。
任何提示或提示都将受到高度赞赏。
我的尝试：类项目
public class Item implements Serializable {
private String name;
private double price;
public Item() {
name="" ;
price=0.00 ;
}
public Item(String n, double p) {
name = n ;
price = p ;
}
public void setName(String n) {
name = n ;
}
public void setPrice(double p) { price = p ;
}
public String getName() {
return name ;
}
public double getPrice() {
return price ;
}
}
类节点
public class Node {
public Item data ;
public Node next ;
public Node(Item d) {
data = d ;
}
public Node(Item d, Node n) {
data = d ;
next = n ;
}
public String toString() {
return data+"";
}
}
类 ListItems
public class ListItems {
private Node first;
public ListItems(){
first=null;
}
public boolean isEmpty(){
return first==null;
}
public void addAnItems(Item d, int i){
Node node1=new Node(d);
node1.next=first;
first=items.get(i);
}
public void displayList(){
Node current = first;
while(current != null){
System.out.println(current.toString());
current=current.next;
}
}
}
类文件项
import java.io.* ;
import java.util.* ;
public class FileItems {
public static void main (String[]args){
Scanner input1=new Scanner(System.in) ;
try {
Scanner input2=new Scanner(new File("items.txt")) ;
}
catch (FileNotFoundException e) {
System.out.println("ERROR OPENING FILE") ;
System.Exit(1) ;
}
while (input2.hasNext()){
String name1=input2.next() ;
double price1=input2.nextDouble() ;
}
ListItems items=new ListItems();
System.out.println("CHOOSE ONE OF THE FOLLOWING OPTIONS :") ;
System.out.println("ENTER 1 TO ADD AN ITEM TO THE LIST") ;
System.out.println("ENTER 2 TO DELETE AN ITEM FROM THE LIST") ;
System.out.println("ENTER 3 TO DISPLAY ALL THE ITEMS IN THE LIST") ;
System.out.println("ENTER 4 TO CLOSE THE PROGRAM") ;
int in=input1.nextInt() ;
switch (in) {
case 1 : case1() ;
break ;
case 2 : case1() ;
break ;
case 3 : displayList() ;
break ;
case 4 : System.Exit(1) ;
break ;
}
public void case1() {
System.out.println("ENTER THE NAME OF THE ITEM, THE PRICE AND THE INDEX ");
try {
System.out.println("NAME: ") ;
String n2=input1.next() ;
System.out.println("PRICE: ") ;
double p2=input1.nextDouble() ;
System.out.println("INDEX: ") ;
int index=input1.nextInt() ;
}
catch (InputMismatchException e) {
System.out.print("INVALID INPUT") ;
}
Item I=new Item(n2, p2) ;
addAnItem(I, index) ;
}
public static case2() {
System.out.println("ENTER THE INDEX OF THE ITEM TO DELETE IT ") ;
try {
int index=input1.nextInt() ;
}
catch (InputMismatchException e) {
System.out.print("INVALID INPUT") ;
}
items.remove(index) ;
}
}
}