Question

我在获取o / p

存款金额..... 10000.0

提款金额..... 4999.0

储蓄账户余额为：5001.0Rs

存款金额..... 9000.0

贷款账户余额为：11000.0Rs

提款金额为5000.0

贷款帐户余额为：16000.0Rs

请帮助我，我是初学者：

package interfaces;
interface Account 
{   
    double accBal;
void deposit(double amt);   
void withdraw(double amt);
void printBalance();
}

 class SavingsAccount implements Account
{

public void deposit(double amt)
{
    System.out.println("Depositing amount....."+amt);
    accBal = accBal + amt;
}
public void withdraw(double amt) 
{
    System.out.println("Withdrawing amount....."+amt);
    accBal=accBal - amt;
}
public void printBalance() 
{
    System.out.println("Savings Account  Balance is:" +accBal+ "Rs");       
}       
 }

 class LoanAccount implements Account
{

 public void deposit(double amt)
{
    System.out.println("Depositing amount....."+amt);
    accBal=accBal - amt;
}
 public void withdraw(double amt) 
{
    System.out.println("Withdrawing amount....."+amt);
    accBal=accBal + amt;
}
public void printBalance()
{
    System.out.println("Loan Account  Balance is:" +accBal+ "Rs");      
}   

 }

public class TestAccount {

public static void main(String[] args)
{
    Account acc1;
    acc1 = new SavingsAccount();
    acc1.deposit(10000);
    acc1.withdraw(4999);
    acc1.printBalance();
    acc1 = new LoanAccount();
    acc1.deposit(9000);
    acc1.printBalance();
    acc1.withdraw(5000);
    acc1.printBalance();

}

}

需要初始化贷款账户余额=（accBal = 20000.00;）我在子类中尝试过accbal = 20000.00

Answer 1

如果您遵循良好做法和TDD，那么如果您因为目前不支持它而无法做某事，请编写测试，编写代码，重构重复。

如果不符合目的，不要害怕丢弃代码，我要做的一件事是将所有类拆分成单独的文件。让您更容易了解正在发生的事情。

关于设置初始余额，您可以在每个类的构造函数中设置它

公共类LoanAccount实现帐户{

  public LoanAccount(double initialBalance)
  {
      this.accbalance = initialBalance;
  }

}

在Java中使用界面需要帮助

1 个答案: