我需要編寫一個(gè) Mobile 數(shù)組列表，執(zhí)行一些操作，例如添加、刪除、更新和顯示。然而，當(dāng)談到對(duì) arraylist 中的對(duì)象進(jìn)行排序時(shí)，我有點(diǎn)困惑。我正在談?wù)摬⒖糷ttps://beginnersbook.com/2017/08/comparator-interface-in-java/在駕駛類中   //Create an arraylist of Mobile    ArrayList<Mobile> themobile = new ArrayList<>();    Scanner input = new Scanner(System.in);    System.out.println("Welcome to Mobile");    System.out.println("Please select a number in the following: ");    while (true) {          //A list of options         System.out.println("1. Diplay the next mobile.");        System.out.println("2. Display the previous mobile.");        System.out.println("3. Add a new mobile.");        System.out.println("4. Remove a new mobile");        System.out.println("5. Update a mobile.");        System.out.println("0. Exit");        //prompt user input        int choice = input.nextInt();        switch(choice) {            case 1:                //displayNext(themobile);                break;            case 2:                //displayPrevious(themobile);                break;            case 3:                addMobile(themobile);                break;            case 4:                removeMobile(themobile);                break;            case 5:                 updateMobile(themobile);                break;            case 0:                System.out.println("Thank you for using a Mobile arraylist");                System.exit(0);        }    }    Collections.sort((themobile, new MobileByBrandName());    System.out.println("Sorted by brand name" + themobile);    Collections.sort(themobile, new MobileByMoNum());    System.out.println("Sorted by brand name" + themobile);    Collections.sort(themobile, new MobileByInS());    System.out.println("Sorted by brand name" + themobile);}