Delete old files before adding new files in directory java without using FileUtils [duplicate]

-2

This question already has an answer here:

Delete all files in directory (but not directory) - one liner solution

9 answers

I am writing new files into a directory on daily basis.

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

Before creating new files, I want to delete the previously added files existing in the folder. And the previous files will not override with new ones because the file names are different. How can I achieve this?

edited Nov 21 '18 at 9:46

asked Nov 21 '18 at 9:37

Richa Sharma

marked as duplicate by Phil Ross, Robert Kock, Mark Rotteveel java
Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed.

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Nov 21 '18 at 13:01

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Do you want to delete all files within that directory or only those whose name follow a specific pattern?

– Robert Kock
Nov 21 '18 at 9:40

If you want the directory empty, list the files in the directory and delete them all. Otherwise you'd also need some sort of filename matching.

– Mark Jeronimus
Nov 21 '18 at 9:41

@RobertKock I want to delete all files,i.e, empty the entire directory before performing bufferedWriter.

– Richa Sharma
Nov 21 '18 at 9:42

You can delete that directory, create again and save your new files.

– htpvl
Nov 21 '18 at 9:42

@htpvl Can you tell how you are going to delete the directory (with files in it)?

– prasad_
Nov 21 '18 at 10:08

add a comment |

-2

This question already has an answer here:

Delete all files in directory (but not directory) - one liner solution

9 answers

I am writing new files into a directory on daily basis.

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

edited Nov 21 '18 at 9:46

asked Nov 21 '18 at 9:37

Richa Sharma

marked as duplicate by Phil Ross, Robert Kock, Mark Rotteveel java
Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed.

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Nov 21 '18 at 13:01

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Do you want to delete all files within that directory or only those whose name follow a specific pattern?

– Robert Kock
Nov 21 '18 at 9:40

If you want the directory empty, list the files in the directory and delete them all. Otherwise you'd also need some sort of filename matching.

– Mark Jeronimus
Nov 21 '18 at 9:41

@RobertKock I want to delete all files,i.e, empty the entire directory before performing bufferedWriter.

– Richa Sharma
Nov 21 '18 at 9:42

You can delete that directory, create again and save your new files.

– htpvl
Nov 21 '18 at 9:42

@htpvl Can you tell how you are going to delete the directory (with files in it)?

– prasad_
Nov 21 '18 at 10:08

add a comment |

-2

This question already has an answer here:

Delete all files in directory (but not directory) - one liner solution

9 answers

I am writing new files into a directory on daily basis.

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

edited Nov 21 '18 at 9:46

asked Nov 21 '18 at 9:37

Richa Sharma

This question already has an answer here:

Delete all files in directory (but not directory) - one liner solution

9 answers

I am writing new files into a directory on daily basis.

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

This question already has an answer here:

Delete all files in directory (but not directory) - one liner solution

9 answers

java file bufferedwriter

edited Nov 21 '18 at 9:46

asked Nov 21 '18 at 9:37

Richa Sharma

edited Nov 21 '18 at 9:46

asked Nov 21 '18 at 9:37

Richa Sharma

edited Nov 21 '18 at 9:46

asked Nov 21 '18 at 9:37

Richa Sharma

asked Nov 21 '18 at 9:37

Richa Sharma

asked Nov 21 '18 at 9:37

Richa Sharma

marked as duplicate by Phil Ross, Robert Kock, Mark Rotteveel java
Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed.

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Nov 21 '18 at 13:01

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

marked as duplicate by Phil Ross, Robert Kock, Mark Rotteveel java
Users with the java badge can single-handedly close java questions as duplicates and reopen them as needed.

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Nov 21 '18 at 13:01

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Do you want to delete all files within that directory or only those whose name follow a specific pattern?

– Robert Kock
Nov 21 '18 at 9:40

If you want the directory empty, list the files in the directory and delete them all. Otherwise you'd also need some sort of filename matching.

– Mark Jeronimus
Nov 21 '18 at 9:41

@RobertKock I want to delete all files,i.e, empty the entire directory before performing bufferedWriter.

– Richa Sharma
Nov 21 '18 at 9:42

You can delete that directory, create again and save your new files.

– htpvl
Nov 21 '18 at 9:42

@htpvl Can you tell how you are going to delete the directory (with files in it)?

– prasad_
Nov 21 '18 at 10:08

add a comment |

Do you want to delete all files within that directory or only those whose name follow a specific pattern?

– Robert Kock
Nov 21 '18 at 9:40

If you want the directory empty, list the files in the directory and delete them all. Otherwise you'd also need some sort of filename matching.

– Mark Jeronimus
Nov 21 '18 at 9:41

@RobertKock I want to delete all files,i.e, empty the entire directory before performing bufferedWriter.

– Richa Sharma
Nov 21 '18 at 9:42

You can delete that directory, create again and save your new files.

– htpvl
Nov 21 '18 at 9:42

@htpvl Can you tell how you are going to delete the directory (with files in it)?

– prasad_
Nov 21 '18 at 10:08

Do you want to delete all files within that directory or only those whose name follow a specific pattern?

– Robert Kock
Nov 21 '18 at 9:40

If you want the directory empty, list the files in the directory and delete them all. Otherwise you'd also need some sort of filename matching.

– Mark Jeronimus
Nov 21 '18 at 9:41

@RobertKock I want to delete all files,i.e, empty the entire directory before performing bufferedWriter.

– Richa Sharma
Nov 21 '18 at 9:42

You can delete that directory, create again and save your new files.

– htpvl
Nov 21 '18 at 9:42

@htpvl Can you tell how you are going to delete the directory (with files in it)?

– prasad_
Nov 21 '18 at 10:08

add a comment |

2 Answers
2

active

oldest

votes

You can delete all existing files from the given directory using this one liner code,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

So, just place this line of code before your BufferedWriter line, like this,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

edited Nov 21 '18 at 10:01

answered Nov 21 '18 at 9:54

Pushpesh Kumar Rajwanshi

7,6032927

1

thanks @Pushpesh it worked:)

– Richa Sharma
Nov 22 '18 at 9:18

Glad to help Richa :) It showed me that you accepted my answer then suddenly I saw it got unaccepted. Any reasons? You didn't find my solution good enough?

– Pushpesh Kumar Rajwanshi
Nov 22 '18 at 9:20

1

accidently clicked accept icon twice.

– Richa Sharma
Nov 22 '18 at 9:34

add a comment |

The following code can be helpful.

(This is just the idea of what you can do and I'm not sure about bugs.)

public class rename 

{ 

    public static void main(String argv) throws IOException 

    { 

         // Path of folder where files are located 

         String folder_path = 

           "C:\Users\Anannya Uberoi\Desktop\myfolder"; 



         // creating new folder 

         File myfolder = new File(folder_path); 



         File file_array = myfolder.listFiles(); 

         for (int i = 0; i < file_array.length; i++) 

         { 



            if (file_array[i].isFile()) 

            { 



                File myfile = new File(folder_path + 

                     "\" + file_array[i].getName()); 

                myfile.delete(); 

            } 

        } 

    } 

}

edited Nov 21 '18 at 9:47

Mark

3,69921126

answered Nov 21 '18 at 9:45

hamid ghasemi

6791624

thanks, @hamid this worked for me.

– Richa Sharma
Nov 22 '18 at 9:17

add a comment |

2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

You can delete all existing files from the given directory using this one liner code,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

So, just place this line of code before your BufferedWriter line, like this,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

edited Nov 21 '18 at 10:01

answered Nov 21 '18 at 9:54

Pushpesh Kumar Rajwanshi

7,6032927

1

thanks @Pushpesh it worked:)

– Richa Sharma
Nov 22 '18 at 9:18

Glad to help Richa :) It showed me that you accepted my answer then suddenly I saw it got unaccepted. Any reasons? You didn't find my solution good enough?

– Pushpesh Kumar Rajwanshi
Nov 22 '18 at 9:20

1

accidently clicked accept icon twice.

– Richa Sharma
Nov 22 '18 at 9:34

add a comment |

You can delete all existing files from the given directory using this one liner code,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

So, just place this line of code before your BufferedWriter line, like this,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

edited Nov 21 '18 at 10:01

answered Nov 21 '18 at 9:54

Pushpesh Kumar Rajwanshi

7,6032927

1

thanks @Pushpesh it worked:)

– Richa Sharma
Nov 22 '18 at 9:18

Glad to help Richa :) It showed me that you accepted my answer then suddenly I saw it got unaccepted. Any reasons? You didn't find my solution good enough?

– Pushpesh Kumar Rajwanshi
Nov 22 '18 at 9:20

1

accidently clicked accept icon twice.

– Richa Sharma
Nov 22 '18 at 9:34

add a comment |

You can delete all existing files from the given directory using this one liner code,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

So, just place this line of code before your BufferedWriter line, like this,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

edited Nov 21 '18 at 10:01

answered Nov 21 '18 at 9:54

Pushpesh Kumar Rajwanshi

7,6032927

You can delete all existing files from the given directory using this one liner code,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

So, just place this line of code before your BufferedWriter line, like this,

Arrays.asList(new File("C:\difftest\newfiles").listFiles()).stream().forEach(File::delete);

BufferedWriter bw = new BufferedWriter(new FileWriter("C:\difftest\newfiles\"+decisionList.get(i)+"_"+i+".txt"));

edited Nov 21 '18 at 10:01

answered Nov 21 '18 at 9:54

Pushpesh Kumar Rajwanshi

7,6032927

edited Nov 21 '18 at 10:01

answered Nov 21 '18 at 9:54

Pushpesh Kumar Rajwanshi

7,6032927

answered Nov 21 '18 at 9:54

Pushpesh Kumar Rajwanshi

7,6032927

answered Nov 21 '18 at 9:54

Pushpesh Kumar Rajwanshi

7,6032927

1

thanks @Pushpesh it worked:)

– Richa Sharma
Nov 22 '18 at 9:18

Glad to help Richa :) It showed me that you accepted my answer then suddenly I saw it got unaccepted. Any reasons? You didn't find my solution good enough?

– Pushpesh Kumar Rajwanshi
Nov 22 '18 at 9:20

1

accidently clicked accept icon twice.

– Richa Sharma
Nov 22 '18 at 9:34

add a comment |

1

thanks @Pushpesh it worked:)

– Richa Sharma
Nov 22 '18 at 9:18

Glad to help Richa :) It showed me that you accepted my answer then suddenly I saw it got unaccepted. Any reasons? You didn't find my solution good enough?

– Pushpesh Kumar Rajwanshi
Nov 22 '18 at 9:20

1

accidently clicked accept icon twice.

– Richa Sharma
Nov 22 '18 at 9:34

thanks @Pushpesh it worked:)

– Richa Sharma
Nov 22 '18 at 9:18

Glad to help Richa :) It showed me that you accepted my answer then suddenly I saw it got unaccepted. Any reasons? You didn't find my solution good enough?

– Pushpesh Kumar Rajwanshi
Nov 22 '18 at 9:20

accidently clicked accept icon twice.

– Richa Sharma
Nov 22 '18 at 9:34

add a comment |

The following code can be helpful.

(This is just the idea of what you can do and I'm not sure about bugs.)

public class rename 

{ 

    public static void main(String argv) throws IOException 

    { 

         // Path of folder where files are located 

         String folder_path = 

           "C:\Users\Anannya Uberoi\Desktop\myfolder"; 



         // creating new folder 

         File myfolder = new File(folder_path); 



         File file_array = myfolder.listFiles(); 

         for (int i = 0; i < file_array.length; i++) 

         { 



            if (file_array[i].isFile()) 

            { 



                File myfile = new File(folder_path + 

                     "\" + file_array[i].getName()); 

                myfile.delete(); 

            } 

        } 

    } 

}

edited Nov 21 '18 at 9:47

Mark

3,69921126

answered Nov 21 '18 at 9:45

hamid ghasemi

6791624

thanks, @hamid this worked for me.

– Richa Sharma
Nov 22 '18 at 9:17

add a comment |

The following code can be helpful.

(This is just the idea of what you can do and I'm not sure about bugs.)

public class rename 

{ 

    public static void main(String argv) throws IOException 

    { 

         // Path of folder where files are located 

         String folder_path = 

           "C:\Users\Anannya Uberoi\Desktop\myfolder"; 



         // creating new folder 

         File myfolder = new File(folder_path); 



         File file_array = myfolder.listFiles(); 

         for (int i = 0; i < file_array.length; i++) 

         { 



            if (file_array[i].isFile()) 

            { 



                File myfile = new File(folder_path + 

                     "\" + file_array[i].getName()); 

                myfile.delete(); 

            } 

        } 

    } 

}

edited Nov 21 '18 at 9:47

Mark

3,69921126

answered Nov 21 '18 at 9:45

hamid ghasemi

6791624

thanks, @hamid this worked for me.

– Richa Sharma
Nov 22 '18 at 9:17

add a comment |

The following code can be helpful.

(This is just the idea of what you can do and I'm not sure about bugs.)

public class rename 

{ 

    public static void main(String argv) throws IOException 

    { 

         // Path of folder where files are located 

         String folder_path = 

           "C:\Users\Anannya Uberoi\Desktop\myfolder"; 



         // creating new folder 

         File myfolder = new File(folder_path); 



         File file_array = myfolder.listFiles(); 

         for (int i = 0; i < file_array.length; i++) 

         { 



            if (file_array[i].isFile()) 

            { 



                File myfile = new File(folder_path + 

                     "\" + file_array[i].getName()); 

                myfile.delete(); 

            } 

        } 

    } 

}

edited Nov 21 '18 at 9:47

Mark

3,69921126

answered Nov 21 '18 at 9:45

hamid ghasemi

6791624

The following code can be helpful.

(This is just the idea of what you can do and I'm not sure about bugs.)

public class rename 

{ 

    public static void main(String argv) throws IOException 

    { 

         // Path of folder where files are located 

         String folder_path = 

           "C:\Users\Anannya Uberoi\Desktop\myfolder"; 



         // creating new folder 

         File myfolder = new File(folder_path); 



         File file_array = myfolder.listFiles(); 

         for (int i = 0; i < file_array.length; i++) 

         { 



            if (file_array[i].isFile()) 

            { 



                File myfile = new File(folder_path + 

                     "\" + file_array[i].getName()); 

                myfile.delete(); 

            } 

        } 

    } 

}

edited Nov 21 '18 at 9:47

Mark

3,69921126

answered Nov 21 '18 at 9:45

hamid ghasemi

6791624

edited Nov 21 '18 at 9:47

Mark

3,69921126

edited Nov 21 '18 at 9:47

Mark

3,69921126

edited Nov 21 '18 at 9:47

Mark

3,69921126

answered Nov 21 '18 at 9:45

hamid ghasemi

6791624

answered Nov 21 '18 at 9:45

hamid ghasemi

6791624

answered Nov 21 '18 at 9:45

hamid ghasemi

6791624

thanks, @hamid this worked for me.

– Richa Sharma
Nov 22 '18 at 9:17

add a comment |

thanks, @hamid this worked for me.

– Richa Sharma
Nov 22 '18 at 9:17

thanks, @hamid this worked for me.

– Richa Sharma
Nov 22 '18 at 9:17

add a comment |

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