Check Write Permissions for a File in Java

The method java.io.File.canWrite() is used to check whether the file can be written to in Java. This method returns true if the file specified by the abstract path name can be written to by an application and false otherwise.

A program that demonstrates this is given as follows −

Example

 Live Demo

import java.io.File;
public class Demo {
   public static void main(String[] args) {
      try {
         File file = new File("demo1.txt");
         file.createNewFile();
         System.out.println("The file can be written to? " + file.canWrite());
      } catch(Exception e) {
         e.printStackTrace();
      }
   }
}

The output of the above program is as follows −

Output

The file can be written to? true

Now let us understand the above program.

The method java.io.File.canWrite() is used to check whether the file can be written to and the boolean value that is returned by the method is printed. A code snippet that demonstrates this is given as follows −

try {
   File file = new File("demo1.txt");
   file.createNewFile();
   System.out.println("The file can be written to? " + file.canWrite());
} catch(Exception e) {
   e.printStackTrace();
}