//父类

 package com.xujingyang.test;

 public class Father {

     public static String staticString="父类中的静态变量";

     public  String str="父类中的非静态变量";

     public static  void staticMethod(){

         System.out.println("父类中的静态方法");

     }

     public   void nostaticMethod() {

         System.out.println("父类中的非静态方法");

     }

 }

 //子类

 package com.xujingyang.test;

 public class Son extends Father {

     public static String staticString="子类中的静态变量";

     public  String str="子类中的非静态变量";

     public static  void staticMethod(){

         System.out.println("子类中的静态方法");

     }

     public   void nostaticMethod() {

         System.out.println("子类中的非静态方法");

     }

 }

 //子类

 package com.xujingyang.test;

 public class A extends Father{

 }

 //测试方法

 package com.xujingyang.test;

 public class Test {

     public static void main(String[] args) {

         Son son=new Son();

         System.out.println(son.str);

         System.out.println(son.staticString);

         son.staticMethod();

         son.nostaticMethod();

         System.out.println("==============================");

         Father f=new Son();

         System.out.println(f.str);

         System.out.println(f.staticString);

         f.staticMethod();

         f.nostaticMethod();

         System.out.println("==============================");

         A f2=new A();

         System.out.println(f2.str);

         System.out.println(f2.staticString);

         f2.staticMethod();

         f2.nostaticMethod();

     }

 }