Java File Class Methods
File Class Methods
The File class (from java.io) is used to work with file and directory paths.
It lets you create, delete, and get information about files and folders - but it does not read or write the contents.
| Method | Description | Return Type |
|---|---|---|
| createNewFile() | Creates a new, empty file if it does not already exist | boolean |
| delete() | Deletes the file or directory | boolean |
| exists() | Tests whether the file or directory exists | boolean |
| canRead() | Tests whether the application can read the file | boolean |
| canWrite() | Tests whether the application can write to the file | boolean |
| isFile() | Returns true if the path represents a file | boolean |
| isDirectory() | Returns true if the path represents a directory | boolean |
| length() | Returns the size of the file in bytes | long |
| getName() | Returns the name of the file or directory | String |
| getAbsolutePath() | Returns the absolute pathname string | String |
| getPath() | Returns the pathname string | String |
| getParent() | Returns the pathname string of the parent directory | String |
| list() | Returns an array of names of files and directories in a directory | String[] |
| listFiles() | Returns an array of File objects in a directory |
File[] |
| mkdir() | Creates a directory | boolean |
| mkdirs() | Creates a directory and any missing parent directories | boolean |
| renameTo(File dest) | Renames the file or directory | boolean |
| setReadOnly() | Marks the file as read-only | boolean |
| setWritable(boolean writable) | Sets the writable permission | boolean |
| setReadable(boolean readable) | Sets the readable permission | boolean |
| setExecutable(boolean executable) | Sets the executable permission | boolean |
| canExecute() | Tests whether the application can execute the file | boolean |
