savings.java

来自「bank account program. if there is savin」· Java 代码 · 共 9 行

// This is the Savings interface. It is an interface, not a class.
// Therefore we do not need to provide detail implementation of the methods, just list them.
 
public interface Savings
{   void deposit(double amount);
     void withdraw(double amount);
    double getBalance();
}