invoicerimpl.java

java游戏核心源代码 对于喜欢java游戏的可以看看 和有帮助的

package services;

public class InvoicerImpl implements Invoicer {

    // this class not implemented for sake of brevity

    public void invoiceCustomer(long customerNumber, String customerEmail, float amount) {
        throw new UnsupportedOperationException();
    }

}