superclass-app/src/main/java/net/altimate/app/ListFilesInDir.java

package net.altimate.app;
import java.io.File;

import static java.util.regex.Pattern.matches;


public class ListFilesInDir {

    public String[] listFilesInDir(String directory) {

        File filesInDir = null;
        File[] paths;
        String match = "^.*.smart$";

        int count=0;
        int filterArrayLength=0;

        try {
            filesInDir = new File(directory);
        }   catch(Exception efile){

                efile.printStackTrace();
            }

            paths = filesInDir.listFiles();

            for (File path:paths) {
                if (path.getName().matches(match)) {
                    filterArrayLength++;
                }
            }

            String[] filter = new String[filterArrayLength];

            for (File path:paths) {
                if (path.getName().matches(match)) {
                    filter[count] = path.getName();
                    count++;
                }
            }
        return filter;
    }




}