银行存取款

package:bank

关于银行存取款的项目代码

/******class: Account*****/
package bank;
public class Account {
    private int id;
    private double balance;
    private double annualInterestRate;
    public Account(int id,double balance,double annualInterestRate){
        this.id=id;
        this.balance=balance;
        this.annualInterestRate=annualInterestRate;
    }
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public double getBalance() {
        return balance;
    }

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

    public double getAnnualInterestRate() {
        return annualInterestRate;
    }

    public void setAnnualInterestRate(double annualInterestRate) {
        this.annualInterestRate = annualInterestRate;
    }
    public void withdraw(double amount){
      if(balance <amount) {System.out.println("余额不足，取款失败");
      balance -=amount;
      }
       else System.out.println("成功取出: "+amount);
    }
    public void deposit(double amount){
       if(amount>0) balance+=amount;
        System.out.println("成功存入: "+amount);
    }
}

/******class: Customer*****/
package bank;

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

    public String getFirstName() {
        return firstName;
    }

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

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

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

}

/******class: CustomeTestr*****/
package bank;

public class CustomerTest {

    public static void main(String[] args) {
        Customer cust=new Customer("Jane","Smith");
        Account acct =new Account (1000,2000,0.0123);
        cust.setAccount(acct);
        cust.getAccount().deposit(100);
        cust.getAccount().withdraw(960);
        cust.getAccount().withdraw(200);
        System.out.println("Customer: "+cust.getFirstName()+","+cust.getLastName()+",id is "+cust.getAccount().getId());
    }
}

注意点：

cust.getAccount().deposit(100);

cust.getAccount().withdraw(960);

cust.getAccount().withdraw(200);

到class:Customer，返回account，account为class:Account，然后找到deposit、withdraw method进行调用