Medium

Photos.java

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.util.Map;
import java.util.List;

public class Photos {

    private final Path source;

    private final Path destination;

    public Photos(Path source, Path destination) throws IOException {
        this.source = source;
        this.destination = destination;
        importAll();
    }

    public Photos(String source, String destination) throws IOException {
        this.source = Path.of(source);
        this.destination = Path.of(destination);
        importAll();
    }
    
    public String[] list() throws SecurityException {
        return this.source.toFile().list((dir, name) -> name.toLowerCase().endsWith(".jpeg"));
    }

    private void importAll() throws IOException {
        Files.copy(source, destination, StandardCopyOption.REPLACE_EXISTING);
    }
}