How to Copy a Subset of Files within a Directory in Java?

Copying Files: Java's Approach with FileUtils

Challenge:

Copying a subset of files from a directory into a subdirectory within the same directory using Java.

Solution:

Java's native file handling capabilities lack an explicit method for copying files. However, leveraging third-party libraries can simplify this task.

Implementation:

1. Import the FileUtils class from the Apache Commons IO library.
2. Define source and destination file objects based on the origin and target paths.
3. Utilize the FileUtils.copyDirectory method to copy the source files to the destination directory.

Code Snippet:

import org.apache.commons.io.FileUtils;

public class FileCopying {

    public static void main(String[] args) {
        File source = new File("H:\work-temp\file");
        File dest = new File("H:\work-temp\file2");
        try {
            FileUtils.copyDirectory(source, dest);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Explanation:

• The FileUtils.copyDirectory method handles the copying process, providing a versatile solution.
• This approach promotes code simplicity and reduces the need for complex custom implementation.

Benefits:

• Convenience: Utilizes a library designed specifically for file manipulation, saving time and effort.
• Reliability: Leverages a well-tested library, ensuring robust and reliable copying functionality.
• Extensibility: The library offers additional features for file handling, allowing for future enhancements.

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