Question

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.)
   

3. Then your program should create an array with File class objects for each item in the contents of the source directory, similar to what was done in DirectoryListDemo.
   

4. Next , it should iterate the array, and for each item in the array,
   

   1. if it is a file, copy the file to the new directory using the copyFile() method taken from CopyFileDemoE.

   2. if it is a directory, recursively call this method to copy the directory and all of its contents.

The finished program will be a very useful utility. For example, a user could put an old flash ROM drive in one USB port, and a new flash ROM Drive in another USB port, and then, assuming that the two ports are the E: and F: drives, the user could run your program and tell it to copy E:/ to F:/, which would make a copy of the USB drive.

Java

Answer 1

**************************FileOperation.java************************************

package file_operations;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Set;

/**

* The Class FileOperation provides the implementation of creating new

* directories and copy content from older to new directories.

*/

public class FileOperation {

/**

* The file directories. This variable holds the destination location and

* src file.

*/

private Map<String, File[]> fileDirectories;

/**

* Instantiates a new file operation.

*/

public FileOperation() {

fileDirectories = new HashMap<>();

}

/**

* Make new directories. This method is used to create new directories with

* same structure as in older one.

*

* @param source the source

* @param destination the destination

*/

public void makeNewDirectories(String source, String destination) {

File[] directories = new File(source).listFiles();

for (File dir : directories) {

String src = dir.getAbsolutePath();

String dest = destination + src.substring(src.indexOf(":") + 1, src.length());

new File(dest).mkdirs();

File[] filenames = new File(src).listFiles();

fileDirectories.put(dest, filenames);

}

}

/**

* Copy file. This method is used to copy content from older file location

* to new file loaction

* @throws IOException Signals that an I/O exception has occurred.

*/

public void copyFile() throws IOException {

Set<Entry<String, File[]>> entry = fileDirectories.entrySet();

FileReader fr = null;

FileWriter fw = null;

BufferedWriter bw = null;

BufferedReader br = null;

try {

Iterator<Entry<String, File[]>> itr = entry.iterator();

while (itr.hasNext()) {

String key = itr.next().getKey();

File[] fileList = fileDirectories.get(key);

// This for loop is implemented to copy content from source to

// destination file location.

for (File file : fileList) {

String destFile = key + File.separator + file.getName();

fr = new FileReader(file);

fw = new FileWriter(destFile);

br = new BufferedReader(fr);

bw = new BufferedWriter(fw);

String line = null;

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

bw.write(line);

bw.newLine();

}

bw.flush();

}

}

}

catch (IOException e) {

System.out.println(e);

}

finally {

fr.close();

fw.close();

}

}

}

********************************FileOperator.java************************************

package file_operations;

import java.io.IOException;

import java.util.Scanner;

/**

* The Class FileOperator provides implementation to take user input i.e.

* location directory locations.

*/

public class FileOperator {

/** The scan. */

private static Scanner scan = new Scanner(System.in);

/**

* The main method.

*

* @param args the arguments

* @throws IOException Signals that an I/O exception has occurred.

*/

public static void main(String[] args) throws IOException {

System.out.println("Enter source location: ");

String source = scan.nextLine();

System.out.println("Enter destination location: ");

String destination = scan.nextLine();

FileOperation fo = new FileOperation();

// first new directories are created

fo.makeNewDirectories(source, destination);

// Copying file to new location

fo.copyFile();

System.out.println("********Finished************");

}

}

********************Output*****************************

e Console X Tasks of* JUnit Gradle Executions <terminated> FileOperator (Java Application] C:\Program Files\Java\jre1.8.0_121\binjavaw.exe (Feb 25, Enter source location: E:/student Enter destination location: F: ********Finished* ****

**************************************************************************************************************************
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