Lỗi cannot be cast to class java lang Comparable

[Phu_Quang1 (Phú Quang)]

public class Function {
    Scanner sc = new Scanner(System.in);
    CarList<Car> carList = new CarList<>();
    public int isExist(String name){
        for(int i = 0; i<carList.getA().size();i++)
            if (carList.getA().get(i).getName().equalsIgnoreCase(name)) return 1;
            return -1;  
    }   
    public void add(){
       String name;
        System.out.println("Input Name :");
        name = sc.next();
        if(isExist(name) != -1){
           System.err.println("This car existed in the list ");
    } else {
        System.out.println("Input price :");
        double price = sc.nextDouble();
        System.out.println("Input production : ");
        int production = sc.nextInt();
        carList.getA().add(new Car(name,price,production));
        System.err.println("Add new car succesful !"); }
}
    public void display(){
        if(carList.getA().isEmpty())
            System.out.println("List empty !!");
        else {
            System.err.println("List of cars : ");
            for (int i = 0; i < carList.getA().size(); i++)
                System.out.println(i+1+"."+carList.getA().get(i));                 
}
}
    public void numberOfItems(){
        System.out.println("Number of items : "+carList.getA().size());
    }
    public void delete(){
        int position = 0;
        if(carList.getA().isEmpty()){
            System.out.println("List is empty !!");
        } else {
            display();
            System.out.println("Enter position to delete ");
            position = sc.nextInt();
            int amount = carList.getA().size();
            if(position>=amount || position < 0) {
                System.err.println("There is no car to remove.Enter again : ");
                delete();
        } else {carList.getA().remove(position-1); 
        System.err.println("Remove successful !"); }
    }
    }
    public void checkEmpty(){
        if (carList.getA().isEmpty()) {
            System.out.println("List is Empty !!");
        } else {
            System.out.println("List isn't Empty !!");
        }
    }
    public void sort(){
        Collections.sort(carList.getA(),Comparator.comparing(Car::getName));
        Collections.reverse(carList.getA());
        System.out.println("Sorting....success !!");
    }
    public int showMenu(){
        System.err.println("__________MENU CAR__________");
        System.out.println("1.Add");
        System.out.println("2.Display");
        System.out.println("3.Get size");
        System.out.println("4.Check empty");
        System.out.println("5.Delete");
        System.out.println("6.Sort");
        System.out.println("7.Search");
        System.out.println("8.Exit");
        System.out.println("Choose your option : ");
        int option = sc.nextInt();
        return option;
    }
    public void search(){
        System.out.println("Enter name :");
        String name1 = sc.nextLine();
        int index = Collections.binarySearch(carList.getA(),name1,Collections.reverseOrder());
        System.out.println(index);
}
}

public class CarList<T>{
    private T obj;
    private LinkedList<T> a = (LinkedList<T>) new LinkedList<T>();

    public T getObj() {
        return obj;
    }

    public void setObj(T obj) {
        this.obj = obj;
    }

    public LinkedList<T> getA() {
        return a;
    }

    public void setA(LinkedList<T> a) {
        this.a = a;
    }
}

hí các bác lúc em chạy cái hàm search() thì nó bị lỗi ạ. mong các bác fix giùm em với ạ

Exception in thread “main” java.lang.ClassCastException: class ws10.Car cannot be cast to class java.lang.Comparable (ws10.Car is in unnamed module of loader ‘app’; java.lang.Comparable is in module java.base of loader ‘bootstrap’)
at java.base/java.util.Collections$ReverseComparator.compare(Collections.java:5286)
at java.base/java.util.Collections.indexedBinarySearch(Collections.java:336)
at java.base/java.util.Collections.binarySearch(Collections.java:324)
at ws10.Function.search(Function.java:95)
at ws10.Main.main(Main.java:35)

[Le_Trong1 (Lê Trọng)]

Bạn bị lỗi trôi dòng lệnh khá nhiều. Đổi thành parse hết đi chứ. Còn lỗi chổ search, có thể bạn bị 2 lỗi. Một là Class Car chưa implements Comparable thì lấy đâu ra mà .sort() với chả .reverseOrder().
Hai là name1 là sao cơ nó có phải là Car đâu, phải như vậy mới đúng nè:

Collections.binarySearch(carList.getA(),new Car(name1, null, null),Collections.reverseOrder());