小编xki*_*lip的帖子

我正在进行一项任务,我正在尝试向LinkedList添加一个元素.第一个代码块是给定的,不应该更改.第二个块是根据教授给我们的UML编写的,位于另一个类中.

import java.io.*;
import java.util.LinkedList;

public class Assignment10
{
   public static void main(String[] args)
   {
       char input1;
       String inputInfo = new String();
       int operation2;
       String line = new String();

       //create a linked list to be used in this method.
       LinkedList list1 = new LinkedList();

       try
        {
         // print out the menu
         printMenu();

         // create a BufferedReader object to read input from a keyboard
         InputStreamReader isr = new InputStreamReader (System.in);
         BufferedReader stdin = new BufferedReader (isr);

         do
          {
           System.out.print("What action would …