Java : How to program. Tenth edition. Early objects Question 17.10 (Summarizing

Question

Java : How to program. Tenth edition. Early objects

Question 17.10

(Summarizing the file types in a directory). Section 15.3 demonstrated how to get information about files and directories on disk. In addition, you used a DirectoryStream to display the contents of a directory. Interface DirectoryStream now contains default method entries, which returns a Stream. Use the techniques from Seciton 15.3, DirectoryStream method entries, lambdas and streams to summarize the types of files in a specified directory.

Explanation / Answer

class disp_filetypes
{
   public static void main(String args[])
   {

       Path dir ="C:mydir";
       List<Path> listSourceFiles(Path dir) throws IOException {
        List<Path> result = new ArrayList<>();
        try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir, "*.{c,h,cpp,hpp,java}")) {
    for (Path entry: stream) {
    result.add(entry);
    }
        } catch (DirectoryIteratorException ex) {
// I/O error encounted during the iteration, the cause is an IOException
    throw ex.getCause();
        }
       for(i=0;i<result.length();i++)
        System.out.println(result[i];
}
}

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