Check given path is a file and not a symbolic link in Java

Below snippet return true, if the filePath is a regular file and not a symbolic link.

Files.isRegularFile(filePath, LinkOption.NOFOLLOW_LINKS);

 

Let’s experiment it with below example.

$ls -lart
total 8
-rw-r--r--   1 krishna  wheel   12 Jan  7 21:11 a.txt
drwxrwxrwt  17 root     wheel  544 Jan  8 17:53 ..
lrwxr-xr-x   1 krishna  wheel    5 Jan  8 18:03 a_link.txt -> a.txt
drwxr-xr-x   7 krishna  wheel  224 Jan  8 18:03 .

As you see above snippet

1.   a.txt is a regular file

2.   a_link.txt is a symbolic link point to the regular file a.txt

 

Find the below working application.

 

RegularFileCheck.java

package com.sample.app.files;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Path;
import java.util.Objects;

public class RegularFileCheck {

	public static boolean isFile(final String filePath) {
		Objects.requireNonNull(filePath);
		return isFile(new File(filePath));
	}

	public static boolean isFile(final File file) {
		Objects.requireNonNull(file);
		return isFile(file.toPath());
	}

	public static boolean isFile(final Path filePath) {
		Objects.requireNonNull(filePath);
		return Files.isRegularFile(filePath, LinkOption.NOFOLLOW_LINKS);
	}

	public static void main(String[] args) {
		final String file1 = "/Users/Shared/filePrograms/a.txt";
		final String file2 = "/Users/Shared/filePrograms/a_link.txt";

		System.out.println("Is '" + file1 + "' regular file ? " + isFile(file1));
		System.out.println("Is '" + file2 + "' regular file ? " + isFile(file2));
	}
}

Output

Is '/Users/Shared/filePrograms/a.txt' regular file ? true
Is '/Users/Shared/filePrograms/a_link.txt' regular file ? false

 

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