List the file system roots in Java

Java 8Object Oriented ProgrammingProgramming

The method java.io.File.listRoots() is used to list the file system roots in Java. This method requires no parameters. It returns the available file system roots in the form of an array of file objects and if the file system roots cannot be determined, it returns null.

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) {
      File[] roots = File.listRoots();
      try {
         for(File r : roots) {
            System.out.println(r);
         }
      } catch(Exception e) {
         e.printStackTrace();
      }
   }
}

The output of the above program is as follows −

Output

C:\
D:\
E:\
F:\

Note − The output may vary on Online Compilers.

Now let us understand the above program.

The method java.io.File.listRoots() is used to list the file system roots in the form of an array. Then these array elements are printed using for loop. A code snippet that demonstrates this is given as follows −

File[] roots = File.listRoots();
try {
   for(File r : roots) {
      System.out.println(r);
   }
} catch(Exception e) {
   e.printStackTrace();
}
raja
Published on 25-Feb-2019 12:33:48
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