def lastModifiedDate(app: ApplicationInfo) = (new File(app.sourceDir)).lastModified()
 val sortedApps = repository.all.sortWith(lastModifiedDate(_) > lastModifiedDate(_))

VS

 private List<ApplicationInfo> getApplicationsSortedByDate(List<ApplicationInfo> apps) {

        Comparator<ApplicationInfo> dateComparator = new Comparator<ApplicationInfo>() {
            public int compare(ApplicationInfo appInfo1, ApplicationInfo appInfo2) {
                long date1 = new File(appInfo1.sourceDir).lastModified();
                long date2 = new File(appInfo2.sourceDir).lastModified();
                return new Long(date1).compareTo(date2);
            }
        };

        Collections.sort(apps, dateComparator);
        return apps;
    }