通过一个类的方法调用到另一个类的所有方法（以银行账户为例）

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本文介绍了一个简单的Java银行账户管理系统，包括客户类(Customer)与账户类(Account)的设计。客户类能够设置和获取账户信息，而账户类则实现了存款、取款等功能，并能返回账户余额。

主方法

package Overload_text;

public class way {
    public static void main(String[] args) {
        Customer ff =new Customer("jane","smith");
        Account aa =new Account(1000,2000,0.0123);
        ff.setAccount(aa);
        ff.getAccount().getBalance();
        ff.getAccount().withdraw();


        System.out.println(ff.getFirstName()+","+ff.getAccount()+","+aa.getBalance());

    }
}

顾客账户（要有个方法接口调用另一个方法）

package Overload_text;

public class Customer {
        private  String FirstName;
        private String lastName;
        private Account account;
        public Customer(String f,String l){
            FirstName=f;
            lastName=l;
        }

    public String getFirstName() {
        return FirstName;
    }

    public void setFirstName(String firstName) {
        this.FirstName = firstName;
    }

    public Account getAccount() {
        return account;
    }

    public void setAccount(Account account) {
        this.account = account;
    }


}

账户内信息用于被调用

package Overload_text;

public class Account {
    private int id;
    private double balance;
    private  double annuallnterestRate;
    public  Account(int id,double balance,double annuallnterestRate){
                this.id =id;
                this.balance=balance;
                this.annuallnterestRate=annuallnterestRate;
    }

    public int getId() {
        return id;
    }

    public double getAnnuallnterestRate() {
        return annuallnterestRate;
    }

    public double getBalance() {
        return balance;
    }

    public void setAnnuallnterestRate(double annuallnterestRate) {
        this.annuallnterestRate = annuallnterestRate;
    }

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

    public void setId(int id) {
        this.id = id;
    }
    public void withdraw(double amount){
        if (amount<=balance) {
            balance-=amount;
            System.out.println("您已提取" + amount);
        }else if (amount>balance){
                System.out.println("您的余额不足");
            }
    }
    public void deposit(double amount){
        balance+=amount;
        System.out.println("您已存入"+amount);
    }```