package com.company;

public class Demo {
    public static void main(String[] args) {

       System.out.println(80*4+75*0.6);
        System.out.println(80*4+75*0.6);
        System.out.println(80*4+75*0.6);




        System.out.println(calc(80, 75));
        System.out.println(calc(80, 75));
        System.out.println(calc(80, 75));
        System.out.println(calc(80, 75));
    }

    // 方法的封裝 把復(fù)雜的操作放在一個函數(shù)里，

    public static double calc(int pingshi, int qimo) {
        return pingshi * 0.4 + qimo * 0.6;
    }

}





package com.company
/*
* 類的封裝
*
* 1 把屬性私有化   2用方法對外提供訪問或設(shè)置
* */
public class Person {


        private String name;
        private int  age;
        private double hight;

        //getter   setter
        public void setName(String name){

            this.name=name;
        }
        public String getName(){

            return  this.name;
        }


        public  void  setAge(int age){
            this.age=age;

        }

        public  double   getAge(){

            return this.age;
        }


      public  void  setHight(double hight){
        this.hight=hight;

     }

      public  double   getHight(){
        return this.hight;
     }

}

``