How to copy file from one location to another location

Question

I want to copy a file from one location to another location in Java  What is the best way to do this     Here is what I have so far   import java io File  import java io FilenameFilter  import java util ArrayList  import java util List  public class TestArrayList       public static void main String   args            File f   new File               D   CBSE Demo  Demo original  fscommand  contentplayer  config            List lt String gt temp new ArrayList lt String gt             temp add 0   N33            temp add 1   N1417            temp add 2   N331            File   matchingFiles   null          for final String temp1  temp               matchingFiles   f listFiles new FilenameFilter                     public boolean accept File dir  String name                        return name startsWith temp1                                                 System out println  size gt  gt --  matchingFiles length                        This does not copy the file  what is the best way to do this

User · Answer

Files exists    Files createDirectory    Files copy    Overwriting Existing Files   Files move      Files delete    Files walkFileTree   enter link description here

User · Answer

Copy a file from one location to another location means need to copy the whole content to another location Files copy Path source  Path target  CopyOption    options  throws IOException this method expects source location which is original file location and target location which is a new folder location with destination same type file as original   Either Target location needs to exist in our system otherwise we need to create a folder location and then in that folder location we need to create a file with the same name as original filename Then using copy function we can easily copy a file from one location to other    public static void main String   args  throws IOException                   String destFolderPath    D  TestFile abc                   String fileName    pqr xlsx                   String sourceFilePath   D  TestFile xyz xlsx                   File f   new File destFolderPath                   if f mkdir                         System out println  Directory created                                          else                       System out println  Directory Exists                                          f  new File destFolderPath fileName                   if f createNewFile                             System out println  File Created                            else                       System out println  File exists                                           Files copy Paths get sourceFilePath   Paths get destFolderPath  fileName  REPLACE EXISTING                   System out println  Copy done

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public static void copyFile File oldLocation  File newLocation  throws IOException           if   oldLocation exists                   BufferedInputStream  reader   new BufferedInputStream  new FileInputStream oldLocation                 BufferedOutputStream  writer   new BufferedOutputStream  new FileOutputStream newLocation  false                try                   byte    buff   new byte 8192                   int numChars                  while    numChars   reader read   buff  0  buff length        -1                        writer write  buff  0  numChars                                    catch  IOException ex                     throw new IOException  IOException when transferring     oldLocation getPath       to     newLocation getPath                   finally                   try                       if   reader    null                                                  writer close                            reader close                                            catch  IOException ex                        Log e TAG   Error closing files when transferring     oldLocation getPath       to     newLocation getPath                                                 else               throw new IOException  Old location does not exist when transferring     oldLocation getPath       to     newLocation getPath

User · Answer

Using Stream private static void copyFileUsingStream File source  File dest  throws IOException       InputStream is   null      OutputStream os   null      try           is   new FileInputStream source           os   new FileOutputStream dest           byte   buffer   new byte 1024           int length          while   length   is read buffer    gt  0                os write buffer  0  length                   finally           is close            os close             Using Channel private static void copyFileUsingChannel File source  File dest  throws IOException       FileChannel sourceChannel   null      FileChannel destChannel   null      try           sourceChannel   new FileInputStream source  getChannel            destChannel   new FileOutputStream dest  getChannel            destChannel transferFrom sourceChannel  0  sourceChannel size             finally             sourceChannel close               destChannel close                Using Apache Commons IO lib  private static void copyFileUsingApacheCommonsIO File source  File dest  throws IOException       FileUtils copyFile source  dest      Using Java SE 7 Files class  private static void copyFileUsingJava7Files File source  File dest  throws IOException       Files copy source toPath    dest toPath        Or try Googles Guava    https   github com google guava docs  https   guava dev releases snapshot-jre api docs com google common io Files html Compare time      File source   new File  quot  Users sidikov tmp source avi quot        File dest   new File  quot  Users sidikov tmp dest avi quot            copy file conventional way using Stream     long start   System nanoTime        copyFileUsingStream source  dest       System out println  quot Time taken by Stream Copy    quot   System nanoTime  -start                copy files using java nio FileChannel     source   new File  quot  Users sidikov tmp sourceChannel avi quot        dest   new File  quot  Users sidikov tmp destChannel avi quot        start   System nanoTime        copyFileUsingChannel source  dest       System out println  quot Time taken by Channel Copy    quot   System nanoTime  -start                copy files using apache commons io     source   new File  quot  Users sidikov tmp sourceApache avi quot        dest   new File  quot  Users sidikov tmp destApache avi quot        start   System nanoTime        copyFileUsingApacheCommonsIO source  dest       System out println  quot Time taken by Apache Commons IO Copy    quot   System nanoTime  -start                using Java 7 Files class     source   new File  quot  Users sidikov tmp sourceJava7 avi quot        dest   new File  quot  Users sidikov tmp destJava7 avi quot        start   System nanoTime        copyFileUsingJava7Files source  dest       System out println  quot Time taken by Java7 Files Copy    quot   System nanoTime  -start

User · Answer

You can use this  or any variant    Files copy src  dst  StandardCopyOption REPLACE EXISTING     Also  I d recommend using File separator or   instead of    to make it compliant across multiple OS  question answer on this available here   Since you re not sure how to temporarily store files  take a look at ArrayList   List lt File gt  files   new ArrayList    files add foundFile     To move a List of files into a single directory   List lt File gt  files        String path    C  destination    for File file   files        Files copy file toPath             new File path   file getName     toPath            StandardCopyOption REPLACE EXISTING

User · Answer

Use the New Java File classes in Java   7   Create the below method and import the necessary libs   public static void copyFile  File from  File to   throws IOException       Files copy  from toPath    to toPath           Use the created method as below within main   File dirFrom   new File fileFrom   File dirTo   new File fileTo    try           copyFile dirFrom  dirTo     catch  IOException ex            Logger getLogger TestJava8 class getName    log Level SEVERE  null  ex       NB - fileFrom is the file that you want to copy to a new file fileTo in a different folder   Credits -  Scott  Standard concise way to copy a file in Java

[java] How to copy file from one location to another location?

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