testsuper.java

有大量的java的实例

public class TestSuper
{
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;
	}
	double getBalance()
	{
		return super.balance;
	}
}