phonecard.java

模拟电话卡的收费计费

import java.util.Date;
abstract class PhoneCard
{
	double balance;
	abstract boolean performDial();
	double getBalance()
	{
		return balance;
	}
}

abstract class None_Number_PhoneCard extends PhoneCard
{
	String phoneSetType;
	String getSetType()
	{
		return phoneSetType;
	}
}

abstract class Number_PhoneCard extends PhoneCard
{
	long cardNumber;
	int password;
	String connectNumber;
	boolean connected;
	
	boolean performConnection(long cn,int pw)
	{
		if(cn == cardNumber&&pw == password)
		{
			connected = true;
			return true;
		}
		else
			return false;
	}
}

class magCard extends None_Number_PhoneCard
{
	String usefulArea;
	
	boolean performDial()
	{
		if(balance>0.9)
		{
			balance -= 0.9;
			return true;
		}
		else
			return false;
	}
}

class IC_Card extends None_Number_PhoneCard
{
	boolean performDial()
	{
		if(balance>0.5)
		{
			balance -= 0.9;
			return true;
		}
		else
			return false;
	}
}

class IP_Card extends Number_PhoneCard
{
	Date expireDate;
	boolean performDial()
	{
		if(balance>0.3 && expireDate.after(new Date()))
		{
			balance -= 0.3;
			return true;
		}
		else 
			return false;
	}
}

class D200_Card extends Number_PhoneCard
{
	double additoryFee;
	boolean performDial()
	{
		if(balance>(0.5+additoryFee))
		{
			balance -= (0.5+additoryFee);
			return true;
		}
		else
			return false;
	}
}