import java.io.File;

class PathTruncator {

/**

* Truncates a file path to a specified length, handling edge cases.

*

* @param filePath The original file path.

* @param maxLength The maximum length of the truncated path.

* @return The truncated file path. Returns the original path if it's already shorter than maxLength or if the input is null.

*/

public static String truncatePath(String filePath, int maxLength) {

if (filePath == null) {

return null; // Handle null input

}

if (filePath.length() <= maxLength) {

return filePath; // No truncation needed

}

// Handle paths with trailing slashes

String trimmedPath = filePath.trim();

if (trimmedPath.isEmpty()) {

return ""; // Handle empty path after trimming

}

if (trimmedPath.length() <= maxLength) {

return trimmedPath;

}

return trimmedPath.substring(0, maxLength); // Truncate the path

}

public static void main(String[] args) {

//Example Usage

String path1 = "/path/to/a/very/long/file.txt";

String path2 = "short_path.txt";

String path3 = "";

String path4 = null;

String path5 = "/";

String path6 = "/path/to/a/file.txt";

String path7 = "/path/to/a/very/long/file.txt/";

System.out.println("Original: " + path1 + ", Truncated: " + truncatePath(path1, 20));

System.out.println("Original: " + path2 + ", Truncated: " + truncatePath(path2, 20));

System.out.println("Original: " + path3 + ", Truncated: " + truncatePath(path3, 20));

System.out.println("Original: " + path4 + ", Truncated: " + truncatePath(path4, 20));

System.out.println("Original: " + path5 + ", Truncated: " + truncatePath(path5, 20));

System.out.println("Original: " + path6 + ", Truncated: " + truncatePath(path6, 20));

System.out.println("Original: " + path7 + ", Truncated: " + truncatePath(path7, 20));

}

}