list all files and directories java code example

Example 1: how to get all the names of the files in a folder in java?

List<String> results = new ArrayList<String>();


File[] files = new File("/path/to/the/directory").listFiles();
//If this pathname does not denote a directory, then listFiles() returns null. 

for (File file : files) {
    if (file.isFile()) {
        results.add(file.getName());
    }
}

Example 2: java list files in directory

File f = new File("D:/Programming");

// This filter will only include files ending with .py
FilenameFilter filter = new FilenameFilter() {
        @Override
        public boolean accept(File f, String name) {
            return name.endsWith(".py");
        }
    };

// This is how to apply the filter
String [] pathnames = f.list(filter);