Java编程思想读书笔记_第6章（访问权限）

四种访问权限：

public private 包访问权限 protected

如果没有明确指定package，则属于默认包

 package access.dessert;

 public class Cookie {
     public Cookie() {
         System.out.println("Cookie()");
     }

     void bite() {
         System.out.println("bite");
     }
 }

 class Demo {

 }

 //private class Demo1 {
 //不支持private 类
 //}

 //protected class Demo2 {
 //不支持protected 类
 //}

 package access.dessert;

 public class Cake {
     public static void main() {
         Cookie c = new Cookie();
         c.bite();

         Demo d = new Demo();//包访问权限
     }
 }

 public class Egg {
     public static void main() {
         //Cookie c = new Cookie();
     }
 }

 import access.dessert.*;

 public class Dinner {
     public static void main(String[] args) {
         Cookie c = new Cookie();
         //c.bite();

         //Demo d = new Demo();
     }
 }