java - Arraylist indexOf は常に -1 Java を返します

Question

殿堂を作り、さまざまな種類のバンドを追加/削除/検索/編集できるようにするクラスのプロジェクトを行っています。現在、特定のバンドのインデックスを検索する際に問題が発生しています。なぜなら、常に -1 が返されるからです。

これが私のコードです：

public class HallofFame
{
    public static ArrayList<Band> hallOfFame = new ArrayList<Band>();
    public static Scanner scan = new Scanner(System.in);
    public static void main(String[]args){
        int a = 0;
        while(a == 0){
            System.out.println("What would you like to do?");
            System.out.println("");
            System.out.println("1. Add");
            System.out.println("2. Remove");
            System.out.println("3. Edit");
            System.out.println("4. Clear");
            System.out.println("5. Search");
            System.out.println("6. Quit");
            System.out.println("");
            String choice = scan.nextLine();
            if(choice.equals ("1")){
                add();
            }
            else if(choice.equals ("2")){
                remove();
            }
            else if(choice.equals ("3")){
                edit();
            }
            else if(choice.equals ("4")){
                clear();
            }
            else if(choice.equals ("5")){
                search();
            }
            else if(choice.equals ("6")){
                quit();
                break;
            }
        }
    }

    public static void add(){
        Scanner booblean = new Scanner(System.in);
        System.out.println("What is the name of the band you would like to add?");
        String name = scan.nextLine();
        System.out.println("What kind of genre is this band?");
        String genre = scan.nextLine();
        System.out.println("How many members are in the band?");
        int numMem = scan.nextInt();
        System.out.println("How many songs does this band have?");
        int numSongs = scan.nextInt();
        System.out.println("How many albums does this band have?");
        int numAlbs = scan.nextInt();
        System.out.println("Is this band currently active?");
        String yesno = booblean.nextLine();
        boolean isActive = false;
        if(yesno.equalsIgnoreCase ("yes")){
            isActive = true;
        }
        Band b1 = new Band(name, genre, numMem, numSongs, numAlbs, isActive);
        hallOfFame.add(b1);
        System.out.println("");
        System.out.println("The band " + name + " has been added to the database.");
        System.out.println("");
    }

    public static void remove(){

    }

    public static void edit(){
        System.out.println("What band info do you want to edit?");
        String searchband = scan.nextLine();
    }

    public static void clear(){
        hallOfFame.clear();
    }

    public static void search(){
        System.out.println("What band name are you searching for?");
        String searchband = scan.nextLine();
        int retval = hallOfFame.indexOf(searchband);
        System.out.println("The band " + searchband + " is at index: " + retval);
    }

    public static void quit(){
        System.exit(0);
    }
}

検索方法は、私が問題を抱えているものです。