可透支銀行賬戶 繼承與super的使用

@override

public
void
withdraw
(double amount)
else
else}}
else
}

package com.jicheng.test4;

//賬戶類
public
class
account
//有參構造器
public
account
(int id,
double balance,
double annualinterestrate)
//返回月利率的方法
public
double
getmonthlyinterest()
//取款方法
public
void
withdraw
(double amount)
else
}//存款方法
public
void
deposit
(double amount)
else
}//獲取id
public
intgetid()
//修改id
public
void
setid
(int id)
//獲取餘額
public
double
getbalance()
//修改餘額
public
void
setbalance
(double balance)
//獲取年利率
public
double
getannualinterestrate()
//修改年利率
public
void
setannualinterestrate
(double annualinterestrate)
}

package com.jicheng.test4;

//可透支的賬戶
public
class
checkaccount
extends
account
//重寫有參構造器方法,加入可透支額度
public
checkaccount
(int id,
double balance,
double annualinterestrate,
double overdraft)
//重寫取款方法
@override
public
void
withdraw
(double amount)
else
else}}
else
}//獲取可透支金額
public
double
getoverdraft()
//修改可透支金額
public
void
setoverdraft
(double overdraft)
}

package com.jicheng.test4;

public
class
accounttest
}

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