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POjava: Sorting objects in collection
 

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    <p>I wrote a code like this which creates 150 employee objects from text files(150 text files) in a folder and stores it in a collection.</p> <p>Those text files contains id,name and age of employess.</p> <p>My problem is i want to sort id,name and age of those 150 employees..how should i write it..should i implement comparator or comparable interface? and to implement it. Please guide me</p> <p>The code is below:</p> <pre><code>package com.fulcrum.emp; import java.io.File; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import java.util.Scanner; public class TestingColections { public static void main(String[] args) { File folder = new File("D:\\employee files"); File[] listOfFiles = folder.listFiles(); ArrayList&lt;Employee&gt; emp= new ArrayList&lt;Employee&gt;();; int id = 0; String name = null; int age = 0; for (File file : listOfFiles) { try { Scanner scanner = new Scanner(file); String tokens = ""; String[] newtokens = null; while (scanner.hasNext()) { tokens = tokens.concat(scanner.nextLine()).concat(" "); tokens = tokens.replace("=", "|"); newtokens = tokens.split("[|\\s]"); } id = Integer.parseInt(newtokens[1]); name = (newtokens[3] + " " + newtokens[4]); age = Integer.parseInt(newtokens[6]); emp.add(new Employee(id, name, age)); } catch (FileNotFoundException e) { e.printStackTrace(); } } for(int i=0;i&lt;emp.size();i++) { System.out.println(emp.get(i)); } } } </code></pre>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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