point.comJava File Class
The Java file class is an abstract that represents the file and the directory pathname.
The file class is used for creating new directories or files, file deletion, etc.
Constructors
| S.No | Constructor | Description |
|---|---|---|
| 1 | File(File parent, String child) | To create a new File instance from a parent abstract pathname and a child pathname string. |
| 2 | File(String pathname) | To create a new File instance by converting the given pathname string into an abstract pathname. |
| 3 | File(String parent, String child) | To create a new File instance from a parent pathname string and a child pathname string. |
| 5 | File(URI uri) | To create a new File instance by converting the given file: URI into an abstract pathname. |
Some Helpful Methods
| S.No | Method | Description |
|---|---|---|
| 1 | public boolean isFile() | This method is used to tests whether the file denoted by this abstract pathname is a normal file. |
| 2 | public boolean isDirectory() | This method is used to tests whether the file denoted by this abstract pathname is a directory. |
| 3 | public String[] list() | This method is used to returns an array of strings naming the files and directories in the directory denoted by this abstract pathname. |
| 4 | public boolean mkdir() | It creates the directory named by this abstract pathname. |
| 5 | public String getName() | This method is used to returns the name of the file or directory denoted by this abstract pathname. |
| 6 | public String getParent() | It returns the pathname string of this abstract pathname's parent, or null if this pathname does not name a parent directory. |
| 7 | public String getPath() | It converts this abstract pathname into a pathname string. |
| 8 | public boolean isAbsolute() | It tests whether this abstract pathname is absolute |
| 9 | public boolean canRead() | It tests whether the application can read the file denoted by this abstract pathname. |
| 10 | public boolean canWrite() | It tests whether the application can modify to the file denoted by this abstract pathname. |
Example:
import java.io.*;
public class FileDemo {
public static void main(String[] args) {
File f= null;
try {
f = new File("javaDemo.txt");
if (file.createNewFile()) {
System.out.println("New File is created Sucessfully");
}else {
System.out.println("File already exists.");
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
Output
New File is created Sucessfully
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