testhiddenfield.java

来自「有大量的java的实例」· Java 代码 · 共 56 行

public class TestHiddenField
{
public static void main(String args[])
{
	D200_Card my200 = new D200_Card();
	my200.balance = 50.0;
	System.out.println("父类被隐藏的金额为："+my200.getBalance());
        if(my200.performDial())
	System.out.println("子类的剩余金额为："+my200.balance);
}
}
abstract  class  PhoneCard
{
double balance;

abstract boolean performDial();
double getBalance()
{
	return balance;
}
}
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  D200_Card extends Number_PhoneCard
{
double  additoryFee;
double  balance;

boolean performDial()
{
	if( balance > (0.5 + additoryFee ))
	{
		balance -= (0.5 + additoryFee);
		return true;
	}
        else
		return false;
}
}