Java 类和对象

编写Java应用程序。首先定义一个描述银行账户的Account类，包括成员变

量“账号”和“存款余额”，成员方法有“存款”、“取款”和“余额查询”。其次，

编写一个主类，在主类中测试Account类的功能。

类：

    String bankAccountNumber;
    String name;
    double cunKuanYu_e;

    void cunkuan(double cunkuan) {
        cunKuanYu_e = cunKuanYu_e + cunkuan;
        System.out.println(name + "你的账号为：" + bankAccountNumber + "的账户中存入" + cunkuan + "元，现有余额" + cunKuanYu_e);
    }

    void qukuan(double qukuan) {
        if (cunKuanYu_e >= qukuan) {
            cunKuanYu_e = cunKuanYu_e - qukuan;
            System.out.println(name + "你的账号为：" + bankAccountNumber + "的账户中取出" + qukuan + "元，现有余额" + cunKuanYu_e);
        } else {
            System.out.println(name + "你的账号为：" + bankAccountNumber + "的账户中余额不足！");
        }
    }

    double getYu_E() {
        return cunKuanYu_e;
    }

调用：

        Account ren1=new Account();
        ren1.bankAccountNumber="622848123456789";
        ren1.name="张三";
        ren1.cunKuanYu_e=587.54;
        
    
        ren1.qukuan(600.0);
        System.out.println(ren1.name+"余额="+ren1.getYu_E());
        ren1.cunkuan(1000);
        
        Account ren2=new Account();
        ren2.bankAccountNumber="622848987654321";
        ren2.name="李四";
        ren2.cunKuanYu_e=87.54;
        
        
        double ren1ye=ren1.getYu_E();
        System.out.println(ren1.name+"的账户余额："+ren1ye);
        double ren2ye=ren2.getYu_E();
        System.out.println(ren2.name+"的账户余额："+ren2ye);

结果: