Delete a specified file
Example
In this example, it deletes the log file "c: \ logfile20100131.log ".
| The code is as follows: |
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Package com. yiibai. file;
Import java. io. File;
Public class DeleteFileExample
{
Public static void main (String [] args)
{
Try {
File file = new File ("c: \ logfile20100131.log ");
If (file. delete ()){
System. out. println (file. getName () + "is deleted! ");
} Else {
System. out. println ("Delete operation is failed .");
}
} Catch (Exception e ){
E. printStackTrace ();
}
}
} |
Delete a file with a certain extension
In this example, we will show you how to use FilenameFilter to list all files whose names end with the extension name "cmd.txt" in the "c: \ folder" folder, and then delete them.
| The code is as follows: |
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Package com. yiibai. io; Import java. io .*; Public class FileChecker {
Private static final String FILE_DIR = "c: \ folder ";
Private static final String FILE_TEXT_EXT = ". txt ";
Public static void main (String args []) {
New FileChecker (). deleteFile (FILE_DIR, FILE_TEXT_EXT );
}
Public void deleteFile (String folder, String ext ){
GenericExtFilter filter = new GenericExtFilter (ext );
File dir = new File (folder );
// List out all the file name with. txt extension
String [] list = dir. list (filter );
If (list. length = 0) return;
File fileDelete;
For (String file: list ){
String temp = new StringBuffer (FILE_DIR)
. Append (File. separator)
. Append (file). toString ();
FileDelete = new File (temp );
Boolean isdeleted = fileDelete. delete ();
System. out. println ("file:" + temp + "is deleted:" + isdeleted );
}
}
// Inner class, generic extension filter
Public class GenericExtFilter implements FilenameFilter {
Private String ext;
Public GenericExtFilter (String ext ){
This. ext = ext;
}
Public boolean accept (File dir, String name ){
Return (name. endsWith (ext ));
}
}
} |
Batch delete files
| The code is as follows: |
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File file = new File ("your_root") // all files are loaded here.
If (file. exists () & file. isDirectory ()){
File. delete ();
} |
