Unable to delete the file after writing

[karthickkuchanur]

package javaTesting;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
 
public class FileMove {
     FileInputStream in = null;
     FileOutputStream out = null;
     String newFileName ="";
     File fileout = null;
    public  static void main(String[] args) throws IOException {
        try {
            FileMove fileMove = new FileMove();
            fileMove.deleteAction();
 
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
 
 
    public void deleteAction() {
        try {
            File file = new File("D:/temp");
            String monthday = getMOnthDay();
            String outFileName = "D:/temp1/"+monthday;
            createFolderIfNotExist(outFileName);
            copyFiles(file,outFileName);
            file = null;
            System.out.println("iam here");
            deleteAllfiles();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    private  String getMOnthDay() {
         String dayMonth ="";
          Calendar ca1 = Calendar.getInstance();
          int iDay=ca1.get(Calendar.DATE);
            Date date = new Date();
            SimpleDateFormat sdf;
            sdf = new SimpleDateFormat("MMM");
            System.out.println("Month " + sdf.format(date));
            dayMonth = sdf.format(date)+String.valueOf(iDay);
            System.out.println(dayMonth);
 
        return dayMonth;
    }
 
    private void copyFiles(File file, String outFileName) {
        try {
            File[] files = file.listFiles();
            for (int i = 0; i < files.length; i++) {
 
                newFileName = outFileName+"/"+files[i].getName();
                fileout = new File(newFileName);
                out = new FileOutputStream(fileout);
                in = new FileInputStream(files[i]);
                byte[] bs = new byte[1024];
                int len;
                while ((len = in.read(bs)) > 0) {
                     out.write(bs, 0, len);
                }
            }
 
        } catch (Exception e) {
            e.printStackTrace();
        }
        finally
        {
            try 
            {
                if(in!=null)
                {
                    in.close();
                }
                if(out!=null)
                {
                    out.flush();
                    out.close();
                }
            } 
            catch (Exception e) 
            {
                System.out.println("==== Ex pppp "+e);
                e.printStackTrace();
            }
        }
    }
 
    private  void deleteAllfiles() {
        try {
            File file = new File("D:/temp");
            File[] deletefiles = file.listFiles();
            for (int i = 0; i < deletefiles.length; i++) {
                 System.out.println(deletefiles[i].delete());
            }
 
        } catch (Exception e) {
            e.printStackTrace();
        }
 
 
    }
 
    private  void createFolderIfNotExist(String outFileName) {
 
        try {
            File createFolder = new File(outFileName);
            if (createFolder.exists()) {
                createFolder.mkdir();
                System.out.println("exit");
            }
            else {
                System.out.println("not exist");
                createFolder.mkdir();
 
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
 
 
    }
}
 

[Dheeraj Joshi]

Your code is throwing null pointer exception in

copyFiles
 

function.

Are you sure this executes correctly to you?

Regards
Dheeraj Joshi

[karthickkuchanur]

Please create folder temp1,temp,

temp is source folder
temp1 is destination folder

Finally the files in the temp should be deleted

Copy from source and destination is working fine but deletion is not working

[Dheeraj Joshi]

Deleting is also working fine. It created a folder with todays date in destination folder and deleted the file from source folder, leaving the folder empty.

Regards
Dheeraj Joshi

[Dheeraj Joshi]

Ok i think i know what is the problem.

This is because you are not closing the streams after every file being copied to the destination folder. You are closing the stream only for last file which is copied. So only the last file gets deleted not the other. So i deleted your finally block and placed it inside the for like

try {
File[] files = file.listFiles();
for (int i = 0; i < files.length; i++) {
 
newFileName = outFileName+"/"+files[i].getName();
fileout = new File(newFileName);
out = new FileOutputStream(fileout);
in = new FileInputStream(files[i]);
byte[] bs = new byte[1024];
int len;
while ((len = in.read(bs)) > 0) {
     out.write(bs, 0, len);
}
try 
{
    if(in!=null)
    {
         in.close();
    }
    if(out!=null)
    {
         out.flush();
         out.close();
    }
} 
catch (Exception e) 
{
    System.out.println("==== Ex pppp "+e);
    e.printStackTrace();
}
}
}
catch (Exception e) {
     e.printStackTrace();
}
 

Now you must be able to delete all the files.

Regards
Dheeraj Joshi

[Dheeraj Joshi]

Finally block executes once the execution of try/catch or try finishes.

Regards
Dheeraj Joshi

[karthickkuchanur]

Thank u very much

[Dheeraj Joshi]

Welcome. Happy to help.

Regards
Dheeraj Joshi