编写一个类实现银行账户Account的概念,包含的属性有“帐号”、“密码”、“存款余额”、“利率rate”、“最小余额”,定义封装这些属性的方法。账号要自动生成。编写主类,使用银行账户类,输入、输出3个储户的上述信息。考虑:哪些属性可以设计成static属性。
Account.java
public class Account {
private int account_number;//账号
private int password;//密码
private double deposit_balance;//存款余额
private double interest_rate;//利率
private double min_balance;//最小余额
static int final_number=2019001;
{
account_number = final_number;
System.out.printf("账号为:%d\n", account_number);
final_number++;
}
public int getAccount_number() {
return account_number;
}
public void setAccount_number(int account_number) {
this.account_number = account_number;
}
public int getPassword() {
return password;
}
public void setPassword(int password) {
this.password = password;
}
public double getDeposit_balance() {
return deposit_balance;
}
public void setDeposit_balance(double deposit_balance) {
this.deposit_balance = deposit_balance;
}
public double getInterest_rate() {
return interest_rate;
}
public void setInterest_rate(double interest_rate) {
this.interest_rate = interest_rate;
}
public double getMin_balance() {
return min_balance;
}
public void setMin_balance(double min_balance) {
this.min_balance = min_balance;
}
@Override
public String toString() {
return "Account [账号" + account_number + ", 密码" + password + ", 存款余额"
+ deposit_balance + ", 利率" + interest_rate + ", 最小余额" + min_balance + "]";
}
}
MainClass.java
import java.util.Scanner;
public class MainClass {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner reader = new Scanner(System.in);
Account user1 = new Account();
Account user2 = new Account();
Account user3 = new Account();
System.out.println("设置密码:");
user1.setPassword(reader.nextInt());
user2.setPassword(reader.nextInt());
user3.setPassword(reader.nextInt());
System.out.println("输入存款:");
user1.setDeposit_balance(reader.nextDouble());
user2.setDeposit_balance(reader.nextDouble());
user3.setDeposit_balance(reader.nextDouble());
System.out.println("输入利率:");
user1.setInterest_rate(reader.nextDouble());
user2.setInterest_rate(reader.nextDouble());
user3.setInterest_rate(reader.nextDouble());
System.out.println("输入最小余额:");
user1.setMin_balance(reader.nextDouble());
user2.setMin_balance(reader.nextDouble());
user3.setMin_balance(reader.nextDouble());
System.out.println(user1.toString()+'\n'+user2.toString()+'\n'+user3.toString());
}
}
运行结果:
没得考虑,直接另外设置一个整数变量为static int 类型,在把值赋值给限制变量。