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  • 多态

    class Bread{
        Bread(){
            System.out.println("Bread()");
        };
    }
    class Cheese{
        Cheese(){
            System.out.println("Cheese()");
        }
    }
    class Lettuce{
        Lettuce(){
            System.out.println("Lettuce()");
        }
    }
    class Lunch extends Lettuce{
        Lunch(){
            System.out.println("Lunch()");
        }
    }
    class PortableLunch extends Lunch{
        PortableLunch(){
            System.out.println("PortableLunch()");
        }
    }
    class Meal{
        Meal(){
            System.out.println("Meal()");
        }
    }
    public class Sandwich  extends PortableLunch{
        private Bread b=new Bread();
        private Cheese c=new Cheese();
        private Lettuce l=new Lettuce();
        public Sandwich(){
            System.out.println("Sandwich");
        }
        public static void main(String[] args) {
            new Sandwich();
            System.out.println("//////////////////////执行后面的类///////////////////////");
        }
    }

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  • 原文地址:https://www.cnblogs.com/gym2017/p/7487236.html
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