Java file IO Exercise title: Copy the. java file under one folder to a. txt file under another folder

 PackageCom.swift;ImportJava.io.BufferedReader;ImportJava.io.BufferedWriter;ImportJava.io.File;ImportJava.io.FileInputStream;Importjava.io.FileNotFoundException;ImportJava.io.FileOutputStream;Importjava.io.IOException;ImportJava.io.InputStreamReader;ImportJava.io.OutputStreamWriter;Importjava.io.UnsupportedEncodingException; Public classCopy_java_to_txt { Public Static voidMain (string[] args) {/** Copy the. java file under one folder to a. txt file under another folder*/        Try{stringbuffer SB=NewStringBuffer (); BufferedReader BR=NewBufferedReader (NewInputStreamReader (NewFileInputStream ("E:\\neck\\test.java"), "Utf-8"));            String str;  while(str = br.readline ())! =NULL) {System.out.println ("Read a line from the file ...");                Sb.append (str); Sb.append ("\ r \ n"); } System.out.println ("File read to container succeeded" + "\ r \ n" +sb.tostring ()); String dir= "E:\\apple"; String FileName= "Test.txt"; File File=NewFile (dir,filename); if(!File.getparentfile (). exists ()) {System.out.println (File.getparentfile ()+ "Directory does not exist, will be created ...");            File.getparentfile (). Mkdirs (); }Else{System.out.println ("Directory exists without creating ..."); } bufferedwriter BW=NewBufferedWriter (NewOutputStreamWriter (NewFileOutputStream (file), "Utf-8"));            Bw.write (Sb.tostring ());        Bw.flush (); } Catch(unsupportedencodingexception e) {e.printstacktrace (); } Catch(FileNotFoundException e) {e.printstacktrace (); } Catch(IOException e) {e.printstacktrace (); }    }}

Above is specifying which file to copy

Below is the search for all files ending in. Java copied to another folder and renamed

You need to use the two types of lists below

The list () method returns the file names of all files and directories under a directory, and returns a string array

The Listfiles () method returns the absolute path to all files and directories in a directory, and returns a file array

Java file IO exercise: Copy the. java file under one folder to a. txt file under another folder