1. Introduction
The isDirectory() method tests whether the file provided is a directory.
2. Method signature
public boolean isDirectory()
Parameters:
- method does not take any parameter
Returns
- true - if the file indicated by this abstract pathname exists and is a directory
Throws
- SecurityException - when we do not have access to the file or directory
3. Examples
3.1. Program that checks if /tmp/frontbackend.txt and /tmp/frontbackend/ are directories
package com.frontbackend.java.io.examples;
import java.io.File;
import java.util.Arrays;
import java.util.List;
public class FrontBackend {
public static void main(String args[]) {
try {
List<File> files = Arrays.asList(new File("/tmp/frontbackend.txt"), new File("/tmp/frontbackend"));
files.forEach(file -> {
if (file.isDirectory()) {
System.out.println(String.format("%s is a directory", file.getAbsolutePath()));
} else {
System.out.println(String.format("%s is not a directory", file.getAbsolutePath()));
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
The output:
/tmp/frontbackend.txt is not a directory
/tmp/frontbackend is a directory
4. Conclusion
In this article, we presented File.isDirectory the method that checks if given File is a directory in the filesystem. Consider using Files.readAttributes() method if you need to distinguish an I/O exception from the case that the file is not a directory.
{{ 'Comments (%count%)' | trans {count:count} }}
{{ 'Comments are closed.' | trans }}