Question

A File class object may refer to a data file or a directory. The IntelliJ project Directory List Demo, discussed starting on page 8, shows how to get information about the contents of a directory using File class methods list() and listFle(). The IntelliJ project Create DirectoriesDemo, starting on page 10, shows how to make a set of directories using the File class method mkdir(). The IntelliJ project CopyFileDemoE has a method to copy a file. Your task is to use techniques from all three of these examples to create software that can be used to copy a directory and all of its contents, including subdirectories and their contents. Your program should work recursively. Your software should: 1. Ask the user for the source directory and a destination. The source is the directory to be copied; the destination is the directory that will be the parent of the new copy. 2. First your program should make a new directory in the new location with the same name as the source directory. (You may need to do something special for root directories if you are copying an entire disk. A root directory has no parent directory, and often, no name.)

Answer 1

Create Simple java project in intellij -> create class with name "CopyFiles" -> paste the code and run.

Make comment if you face any difficulty or you need any modification. Thanks

import java.io.File;

import java.nio.file.Files;

import java.nio.file.StandardCopyOption;

import java.util.Scanner;

public class CopyFiles {

public void copy(File source, File destination) throws Exception {

if (!source.exists()) {

throw new Exception("Source file or directory path does not exists.");

}

if (!destination.exists()) {

destination.mkdirs();

System.out.println("Directory created : " + destination);

}

if (source.isDirectory()) {

File[] files = source.listFiles();

for (File file : files) {

File src = new File(source, file.getName());

File dest = new File(destination, file.getName());

System.out.println("Src : " + src);

System.out.println("Dest : " + dest);

// Recursive function call

copy(src, dest);

}

} else {

Files.copy(source.toPath(), destination.toPath(), StandardCopyOption.REPLACE_EXISTING);

System.out.println("File copied :: " + destination);

}

}

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("Please provide source directory name : ");

String srcPath = sc.next();

System.out.println("Please provide destination directory name : ");

String destPath = sc.next();

File source = new File(srcPath);

File destination = new File(destPath, source.getName());

System.out.println(source.exists() + " : " + source.getPath());

System.out.println(destination.exists() + " : " + destination.getPath());

CopyFiles object = new CopyFiles();

try {

object.copy(source, destination);

} catch (Exception e) {

e.printStackTrace();

}

}

}