Write a program to copy all the. java files in the D:\java directory to the D:\jad directory and change the extension of the original file from. java to. Jad

Import Java.io.BufferedReader; Import Java.io.BufferedWriter; Import Java.io.File; Import Java.io.FileReader; Import Java.io.FileWriter; Import Java.io.FilenameFilter; Import java.io.IOException;
public class Copyfoldertest {public static void main (string[] args) throws IOException {//Encapsulate data source and destination Fil       e file1 = new File ("D:\\java"); File File2 = new file ("D:\\jad");
File filter Encapsulation directory String array object, anonymous object string[] Strarr = file1.list (new FilenameFilter() {
@Override Public Boolean Accept(File dir, String name) {//Judge condition file and suffix return new file (dir, name). Isfile () && name. EndsWith(". Java"); }       });
Traversal for (String Str:strarr) {
An input stream that encapsulates a qualified data source BufferedReader br = new BufferedReader (new FileReader (new F) Ile (File1, str));
Output stream, renaming and encapsulating the destination to be mounted bufferedwriter bw = new BufferedWriter (new FileWriter (File2, str. Replace(". Java", ". Jad")));
        //traversal read-write file         string line = null;         while (line = Br.readline ())!= null) {                bw.write (line);                bw.newline ();                bw.flush ();           }            br.close ();           bw.close ();      }   &nbsp}}