How Can I Recursively List Files in a Directory Using Java?

Recursive File Listing in Java

When tasked with recursively listing files within a directory in Java, the Java API provides a comprehensive solution.

Native Solution with Java 8 Stream

Java 8 introduces a convenient stream-based approach for traversing files in a hierarchical structure:

try (Stream<Path> stream = Files.walk(Paths.get(path))) {
    stream.filter(Files::isRegularFile)
          .forEach(System.out::println);
}

This stream-centric mechanism offers flexibility for performing various operations, including filtering, grouping, and mapping, on the file paths.

Additional Considerations

1. File Attributes Filtering: For specific file attribute filtering criteria, Java provides the Files.find method:

Files.find(Paths.get(path),
           Integer.MAX_VALUE,
           (filePath, fileAttr) -> fileAttr.isRegularFile())
        .forEach(System.out::println);

2. Performance Comparison: Benchmark results indicate minimal performance differences between Files.walk and Files.find when filtering on file attributes. However, Files.walk generally proves more convenient due to its overloads and ease of use.

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