[英]Output does not print all of the list in linked list. Using java
我嘗試使用鏈表制作學生注冊系統列表。 因此,您可以將名稱添加到列表中,但問題是 output 僅打印用戶添加的名字而不是全部。
我嘗試添加邁克爾、凱特和羅斯的名字。 但 output 只顯示邁克爾。
output:
*****學生課程注冊系統*****
- - - - - - - - - - 菜單 - - - - - - - - -
您的選擇:3
學生姓名:邁克爾
請幫我顯示我添加到列表中的所有名稱。 先感謝您。 你的幫助對我真的很有幫助!
public class LinkedList2nd {
Node head;
static class Node
{
// Data fields for Node
Object info; // data stored in the node
Node link; // link to next node
// Methods
// Constructors
// postcondition: Creates a new empty node.
public Node() {
info = null;
link = null;
}
// postcondition: Creates a new node storing obj.
public Node(Object obj) {
info = obj;
link = null;
}
// postcondition: Creates a new node storing obj
// and linked to node referenced by next.
public Node(Object obj, Node next) {
info = obj;
link = next;
}
// accessors
public Object getInfo()
{
return info;
}
public Node getLink()
{
return link;
}
// mutators
public void setInfo(Object newInfo)
{
info = newInfo;
}
public void setLink(Node newLink)
{
link = newLink;
}
}
public static LinkedList2nd insert(LinkedList2nd list,Object info){
Node newNode = new Node(info);
if(list.head == null){
list.head = newNode;
}
else {
//inserting last node
Node current = list.head;
while(current.getLink() != null){
current = current.getLink();
current.setLink(newNode); }//while
}//else
return list;
}
public static void printList(LinkedList2nd list){
Node current = list.head;
System.out.println("Student Name\n--------------");
while(current != null){
System.out.println(current.getInfo() + " ");
current = current.link;//to next node
}//while
System.out.println("\n");
}
}
//`enter code here`MAIN CLASS :
public class Main {
//STUDENT COURSE REGISTRATION SYSTEM
static LinkedList2nd name = new LinkedList2nd();
//static LinkedList matric = new LinkedList();
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int choice;
do {
menu();
System.out.print("Your choice:");
choice=sc.nextInt();
if (choice==0){
System.out.println("Thank you and Good Bye.");
break;
}
else
processChoice(choice);
} while (choice !=0);
}//end main
static void menu(){
System.out.println("*****STUDENT COURSE REGISTRATION SYSTEM*****");
System.out.println("********************************************");
System.out.println("-------------------- MENU ------------------\n"
+"1. ADD NEW STUDENT TO COURSE\n"
+"2. REMOVE/WITHDRAW ENROLLMENT\n"
+"3. DISPLAY STUDENT INFORMATION\n"
+"4. EDIT STUDENT DATA\n"
+"5. SEARCH STUDENT IN THE COURSE\n"
+"0. EXIT");
}//menu
static void processChoice(int choice){
switch (choice) {
case 1:
addStudent();
break;
case 3:
displayList();
break;
default:
break;
}
}
static void addStudent(){
Scanner read = new Scanner(System.in);
System.out.println("Enter Student Name : ");
String inputName = read.nextLine();
name.insert(name, inputName);
}
static void displayList(){
name.printList(name);
}
}//class
在您當前的插入方法中,您將所有節點的鏈接設置為 newNode。 您應該將 set 調用移出循環
while(current.getLink() != null){
current = current.getLink();
current.setLink(newNode); }//while
}//else
已更正
while(current.getLink() != null){
current = current.getLink();
}//else
current.setLink(newNode);
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