需要启动二叉树的帮助吗？

import java.util.Scanner;

class clubmember {

    public static void main(String[] args) {

        int id;
        String fname, lname;
        Scanner input = new Scanner(System.in);

        System.out.println(\"ID>\");
        id = input.nextInt();

        System.out.println(\"Fname >\");
        fname = input.next();

        System.out.println(\"lname >\");
        lname = input.next();


        Person object1 = new Person(id, fname, lname);

        System.out.println(object1);


    }
}




public class Person {
    private final int id;
    private final String firstName;
    private final String lastName;


    public Person(int id, String firstName, String lastName) {
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
    }

    public int getId() {
        return id;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    @Override
    public String toString() {
        return String.valueOf(id) + \": \" + firstName + \" \" + lastName;
    }
}