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  1. import java.io.IOException;
  2. import java.util.HashSet;
  3. import java.util.Set;
  4. import java.util.TreeSet;
  5. import java.util.*;
  6. import java.util.Scanner;
  7. // import java.util.graph;
  8. // import android.ui.*;
  9. public class Main {
  10.     public static void main(String[] args) {
  11.         String[] sampleInput = {
  12.             "report_2025.pdf",
  13.             "data_v1.csv",
  14.             "report_2025.pdf",   
  15.             "notes.txt",
  16.             "image_01.png",
  17.             "data_v1.csv",       
  18.             "archive.tar.gz",
  19.             "notes.txt",         
  20.             "config.json",
  21.             "image_02.png",
  22.             "report_2025.pdf",   
  23.             "readme.md"
  24.         };
  25.  
  26.         Set<String> uniqueFiles = new HashSet<>();
  27.         int duplicateCount = 0;
  28.  
  29.         for (String fileName : sampleInput) {
  30.             String trimmed = fileName.trim();
  31.             if (!trimmed.isEmpty()) {
  32.                 boolean isNew = uniqueFiles.add(trimmed);
  33.                 if (!isNew) {
  34.                     duplicateCount++;
  35.                 }
  36.             }
  37.         }
  38.  
  39.         System.out.println("Total records processed: " + sampleInput.length);
  40.         System.out.println("Duplicates removed: " + duplicateCount);
  41.         System.out.println("Total unique files found: " + uniqueFiles.size());
  42.         System.out.println();
  43.         System.out.println("Unique files list (Sorted alphabetically):");
  44.  
  45.         TreeSet<String> sortedUniqueFiles = new TreeSet<>(uniqueFiles);
  46.         for (String file : sortedUniqueFiles) {
  47.             System.out.println(" - " + file);
  48.         }
  49.     }
  50. }
Success #stdin #stdout 0.11s 37196KB
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stdin
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Standard input is empty
stdout
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Total records processed: 12
Duplicates removed: 4
Total unique files found: 8

Unique files list (Sorted alphabetically):
 - archive.tar.gz
 - config.json
 - data_v1.csv
 - image_01.png
 - image_02.png
 - notes.txt
 - readme.md
 - report_2025.pdf
https://ideone.com/w59Dp3
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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