初步了解继承

 

package com.wangs;

public class AccountTest {
    public static void main(String[] args) {
        Account account = new Account();
        account.setName("小王pohyg");
        account.setPassword("145632");
        account.setBalance(12500.3);
        account.test();
    }
}

class Account {
    private String name;
    private double balance;
    private String password;
//提供两个构造器，一个是传递参数的，一个是无参构造器


    public Account() {

    }

    public Account(String name, double balance, String password) {
        this.setBalance(balance);
        this.setPassword(password);
        this.setName(name);
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        if (name.length() == 2 || name.length() == 3 || name.length() == 4) {
            this.name = name;
        } else {
            System.out.println("给您一个初试的名字");
            this.name = "忘记";
        }

    }

    public double getBalance() {
        return balance;
    }

    public void setBalance(double balance) {
        if (balance > 20) {
            this.balance = balance;
        } else {
            System.out.println("余额必须大于20元");
        }

    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        if (password.length() == 6) {
            this.password = password;
        } else {
            System.out.println("您输入的密码不正确，给你初始密码123456");
            this.password = "123456";
        }
    }

    public void test() {
        System.out.println(name + password + balance);
    }
}