关于Java基础Bank类的一个问题

Question

求大佬帮助，为什么我在执行添加帐户之后程序运行输出的是哈希码，而不是账户的信息呢？类中我是有重写toString方法的

package com.mybank.domain;

public class Account {
    private double balance;

    public void initBalance(double balance) {
        this.balance = balance;
    }

    public boolean deposit(double amt) {
        if(amt > 0) {
            balance +=amt;
            return true;}
        else 
            return false;
    }
    public boolean withdraw(double amt) {
        if(amt > balance) { 
            System.out.println("余额不足！");
            return false;
        }
        else 
            balance -= amt;
            System.out.println("取钱成功！");
            return true;
    }

    public double getBalance() {
        return balance;
    }

}
package com.mybank.domain;

public class Customer {
    private String firstName;
    private String lastName;
    private Account accounts[];
    private int numberOfAccounts;

    public Customer(String firstName,String lastName) {
        this.firstName = firstName;
        this.lastName = lastName;
        accounts = new Account[10];
        numberOfAccounts = 0;
    }

    public String getFirstName() {
        return firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void addAccount(double amt) {
        Account account = new Account();
        account.initBalance(amt);
        accounts[numberOfAccounts++] = account; 
    }

    public int getNumberOfAccounts() {
        return numberOfAccounts;
    }

    public Account getAccount(int index) {
        return accounts[index];
    }

    public String toString() {
        return firstName+" "+lastName;
    }
}

package com.mybank.domain;

public class Bank {
    public static Customer[] customers;
    private static int numberOfCustomers;

    static {
        customers = new Customer[10];
        numberOfCustomers = 0;
    }
    public static void addCustomer(String firstName,String lastName) {
        Customer customer = new Customer(firstName,lastName);
        customers[numberOfCustomers++] = customer;
    }

    public static int getNumberOfCustomers() {
        return numberOfCustomers;
    }

    static Customer getCustomer(int i) {
        return customers[i];
    }

}


package com.mybank.test;

import com.mybank.domain.Bank;

public class TestBanking {

    public static void main(String[] args) {
        Bank.addCustomer("Wang","Ling");
        Bank.customers[0].addAccount(500);
        Bank.customers[0].addAccount(1000);
        Bank.customers[0].addAccount(1500);
            for(int i=0; i<Bank.getNumberOfCustomers();i++) {
                Bank.customers[i].toString();
                for(int j=0; j<Bank.customers[i].getNumberOfAccounts(); j++) {
                    System.out.println(Bank.customers[i].getAccount(j));
                }
            }
        }
}

Answer 1

我看你这打印的是Account类，这个类toString方法没有重写，打印的是内存地址