20165235 Qi Ying 2018-4 "Java Programming" Nineth Week study Summary

20165235 Qi Ying 2018-4 "java program design" Nineth Week study summary textbook learning content Summary URL class

URClass is java.ne an important class in the T package, and the application that uses the URL created object is called a client program.
A URL class creates a class with the following construction methods:public URL（String spec） throws MalformedURLException
URLThe object being created is a http protocol that contains resources that are the default (home page)
A URL object can InputStream openStream（） return an input stream by calling a method that points to URL the resource that the object contains.

Inetadress class

InternetOn the host there are two ways to represent the address, the domain name or the IP address, the way to get the address ：InetAdress static methodgetByte（String s）

Set of bytes

The external program needs to access the native program through the port that the native program occupies.
When two programs need to communicate on the network, you can Socket create a socket object by using the class and join together ( IP a network socket is derived from the combination of port number and address)
The client's program uses the ocket class to create a socket object that is responsible for connecting to the server.
Execute the Accept () 方法之后的程序会被阻塞。 多线程技术：服务端在接受到一个客户端的套接字后，就应该启动一个专门为该客户服务的线程。 ###### UDP数据报 套接字是基于 TCP 的网络通信 ###### 广播数据报 D类地址：相同D类地址的客户端可以享有服务器提供的资源。 要广播或接受广播就要让主机加入到同一个D类地址 ###### java远程调用 RMI 可以让一个虚拟机上的应用程序请求调用位于网络上另一端一个虚拟机上的对象。习惯称发出调用请求的虚拟机为（本地机）客户端。 创建远程对象的类必须实现 Remote ' interface.

Issues and resolution procedures when uploading your code

• Problem: Because the third experiment needs to modify the partner's code, this time in git code there is a merge conflict problem, so that the code can not git push upload.
  
• Workaround and steps: After referring to this blog---git merge conflict resolution, I merged the conflicting content:

1. git statusTo view the current status
2. git addConflicting file names
3. git commit(Note: no addition required -m“” ), you will enter an editor at this time vim :
   
4. Ctrl+zExit to go, and thenrm ./MERGE_HEAD
5. Then git pull you can.

• Problem: This problem has not been resolved since the conflict was resolved, but the total number of lines of code was not used to run the script.

  Script run:

  
  

• Code Cloud Link

Sentiment

Through this week's study and summary, the Java remote Call is not very understanding, the code is a bit complicated, so it seems too messy.

Learning progress Bar

	lines of code (new/cumulative)	Blog Volume (Add/accumulate)	Learning Time (new/cumulative)	Important Growth
Goal	5000 rows	30 Articles	400 hours
First week	31/31	1/1	20/20	The use of Git
Second week	373/404	2/3	18/38	Java Basic Data syntax
Third week	547/920	1/4	22/60	Classes and objects and packaging
Week Four	919/1839	2/6	30/80	Subclass and inheritance, interface and interface-oriented programming
Week Five	500/2300	3/9	20/100	Input and output streams and internal classes
Week Six	300/2600	1/10	25/125	Generic and aggregate frameworks, common utility classes
Seventh Week	447/3047	3/13	25/150	MySQL database and JDBC
Eighth Week	700/3826	3/16	25/175	The multithreading mechanism of Java
Nineth Week	700/4500	2/18	25/200	Java Network programming

Resources

• Java Learning Notes (8th Edition)

• Java Learning Note (8th Edition) Learning Guide

20165235 Qi Ying 2018-4 "Java Programming" Nineth Week study Summary