import java.util.Scanner;

 class Test {

     public static void main(String[] args) {

         coffee per = new coffee();

         per.shaoshui();

         per.receipt();

         per.custom();

         per.jiaoban();

         per.dicha();

     }

 }

     abstract  class beverage{

        private  void shaoshui(){

             System.out.println("烧开水");

     }

         abstract  void receipt();

       private  void jiaoban(){

             System.out.println("搅拌饮料");

         }

         void dicha(){

             System.out.println("给大佬递饮料");

         }

     }

     class coffee extends beverage{

           void shaoshui(){

             System.out.println("烧开水");

         }

          void receipt() {

              System.out.println("加一包秘制咖啡粉");

          }

          public static boolean custom(){

             System.out.println("需要加牛奶吗？");

             Scanner scanner=new Scanner(System.in);

             String str=scanner.nextLine();

             if(str.equalsIgnoreCase("y")){

                 System.out.println("加一包牛奶");

                 return true;

             }

             else if (str.equalsIgnoreCase("n")){

                 System.out.println("客户不需要加牛奶");

                 return false;

             }

             else{

                 System.out.println("非法输入");

                 return false;

             }

         }

         void jiaoban(){

             System.out.println("搅拌饮料");

         }

         void dicha(){

             System.out.println("给大佬递咖啡");

         }

     }