Inheritance of Fields

class Account

{

int balance = 0; // current balance

. . .

}

class SavingsAccount extends Account

{

double rate = 0; // interest rate

. . .

}

// Client code

Account act1 = new Account();

SavingsAccount act2 = new SavingsAccount();

// A SavingsAccount has both balance and rate.

System.out.println(act2.balance); // LEGAL!

System.out.println(act2.rate);

// An account has only a balance.

System.out.println(act1.balance);

// System.out.println(act1.rate); NOT LEGAL!

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