Java匿名内部类的两种经典用法

class Inner
{
public static void main(String[] args)
{
Bank b = new Bank();
System.out.println(b.getCustomer().getName());
}
}

class Bank
{
Customer getCustomer()
{
return new Customer()
{
String getName()
{
return "Frank";
}
};
}
}

abstract class Customer
{
abstract String getName();
}

public interface Accountable
{
public double getBalance();
public void setBalance(double d);
}

public class AccountableAdapter implements Accountable
{
public double getBalance()
{
return 0;
}
public void setBalance(double d)
{
}
}

public class Customer
{
AccountableAdapter aa = new AccountableAdapter()
{
public void setBalance(double d)
{
System.out.println("balance = "+d);
super.setBalance(d);
}
};
}