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POAdding objects to arraylist and sorting it
 

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    <p>I wrote a program in which I add objects to an arraylist and then sort it by ID. Here's my program:</p> <pre><code>package TestPackage; import java.io.File; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.Collections; import java.util.Scanner; import com.fulcrum.emp.EmployeeSortById; public class EmployeeSorting { // path till 'employee files' folder. File folder = new File("D:\\Arthi iyer\\employee files"); // listFiles() : list all the files in a folder. File[] listOfFiles = folder.listFiles(); ArrayList&lt;Employee&gt; emp = new ArrayList&lt;Employee&gt;(); String[] split_input = null; public void sortFiles() throws FileNotFoundException { for (File file : listOfFiles) { Scanner scanner = new Scanner(file); String input = scanner.nextLine(); split_input = input.split("="); int id = Integer.parseInt(split_input[1]); String input1 = scanner.nextLine(); split_input = input1.split("="); String name = split_input[1]; String input2 = scanner.nextLine(); split_input = input2.split("="); int age = Integer.parseInt(split_input[1]); // Employee e=new Employee(id, name, age); // System.out.println(e); emp.add(new Employee(id, name, age)); // System.out.println(emp.size()); // for(int i=0;i&lt;emp.size();i++) // { // System.out.println(emp.get(i) +""+i); // } }// for ends }// method ends public void sortByID() { System.out.println("----Sort By Employee Id----"); Collections.sort(emp, new EmployeeSortById()); } public static void main(String[] args) throws FileNotFoundException { EmployeeSorting sort = new EmployeeSorting(); sort.sortFiles(); sort.sortByID(); } } </code></pre> <p>My problem is it gives an error saying:</p> <blockquote> <p>The method sort(List, Comparator) in the type Collections is not applicable for the arguments (ArrayList, EmployeeSortById)</p> </blockquote> <p>But in my <code>EmployeeSortById</code> class I have implemented <code>Comparator&lt;Employee&gt;</code> properly. Still it's giving problems. Can anyone please guide me?</p>
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    1. USJason
    1. USuser2412380
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    1. COPlease provide implementation of `EmployeeSortById`.
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      1. USLuiggi Mendoza
    2. COmy problem got solved..it was a silly mistake..when i was copy pasting this code from another file com.fulcrum package also got imported..because of which it was giving problem.. :D ..now its running..anyways thanx for help :)
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    3. CO@user2412380 - i think its better to use hashmap for storing employee information. Is there any problem in that?
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      1. USFathah Rehman P
 

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