import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

public class DatasetMerger {

public static List<String> mergeDatasets(List<String> filePaths) {

List<String> mergedPaths = new ArrayList<>();

for (String filePath : filePaths) {

try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {

String line;

while ((line = reader.readLine()) != null) {

mergedPaths.add(line.trim()); // Add each line to the merged list

}

} catch (IOException e) {

System.err.println("Error reading file: " + filePath + " - " + e.getMessage());

// Handle the error appropriately, e.g., log it, skip the file, or re-throw

}

}

return mergedPaths;

}

public static void main(String[] args) {

// Example usage:

List<String> filePaths = new ArrayList<>();

filePaths.add("file1.txt");

filePaths.add("file2.txt");

filePaths.add("file3.txt");

// Create dummy files for testing

try {

java.io.PrintWriter writer1 = new java.io.PrintWriter("file1.txt");

writer1.println("path/to/data1");

writer1.println("path/to/data2");

writer1.close();

java.io.PrintWriter writer2 = new java.io.PrintWriter("file2.txt");

writer2.println("path/to/data3");

writer2.println("path/to/data4");

writer2.close();

java.io.PrintWriter writer3 = new java.io.PrintWriter("file3.txt");

writer3.println("path/to/data5");

writer3.println("path/to/data6");

writer3.close();

} catch (IOException e) {

System.err.println("Error creating dummy files: " + e.getMessage());

}

List<String> mergedDataset = mergeDatasets(filePaths);

for (String path : mergedDataset) {

System.out.println(path);

}

}

}