Create how2_access_inner_class_static_field.MD

how2_access_inner_class_static_field.MD

@@ -0,0 +1,72 @@
+```
+package tech.yusi.fridademo;
+
+public class Jingdong {
+    private int intResult;
+
+    private final static class a {
+        final static Jingdong a = new Jingdong();
+    }
+
+
+    public Jingdong() {
+        intResult = 0;
+    }
+
+    public static Jingdong a() {
+        return a.a;
+    }
+
+    public static int a(int arg0, int arg1) {
+        return arg0 + arg1;
+    }
+
+
+    public String a(String arg0, String arg1) {
+        return arg0 + arg1;
+    }
+}
+```
+
+```
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import frida,sys
+
+rdev = frida.get_remote_device()
+session = rdev.attach("tech.yusi.fridademo")
+
+def on_message(message ,data):
+    if message['type'] == 'send':
+        print(message['payload'])              
+    elif message['type'] == 'error':
+        print(message['stack'])
+    else:
+        print(message)
+    
+jscode = """
+send(Java.available); 
+Java.perform(function () {
+    var JingdongA = Java.use("tech.yusi.fridademo.Jingdong$a");  
+    var Jingdong = JingdongA.a;
+    send(Jingdong.fieldType);
+    
+    var JingdongInstance = Jingdong.value;   
+    var ret = JingdongInstance.a("G8", "4tar");
+    send(ret);
+
+});    
+""" 
+
+script = session.create_script(jscode)
+script.on("message" , on_message)
+script.load()
+
+try:
+    sys.stdin.read()
+except KeyboardInterrupt as e:
+    session.detach()
+    sys.exit(0) 
+```
+