201621123080 Java programming 12th Week of study summary

201621123080 Java programming 12th Week of study Summary 1. This week's study summary 1.1 summarizes multi-stream and file-related content in the way you like (mind mapping or other).

2. System-oriented integrated design-Library management system or shopping cart

Use streams and files to transform your library management system or shopping cart.

2.1 A brief description of how to use streams and files to transform your system. What is the format of the data in the file?

At the beginning of the program, the local User information table and the book information table are read and stored in the dynamic array. At the end of the program, the data in the dynamic array is written to the file and saved.

The data format is as follows (separated by spaces)

User Information	Data
Name	String
Numbers	Long
Password	String
Administrator	Boolean

Book Information	Data
Title	String
Numbers	Long
Author	String
is the loan	Boolean
Borrowers ' numbers	Long

2.2 Brief description of what interfaces and classes are used in the file reading and writing section of the system with the stream associated with the file? Why use these interfaces with classes?

Classes and Interfaces	function
BufferedReader	Buffering of individual characters for improved read-in efficiency
BufferedWriter	Buffer individual characters to improve write efficiency
FileWriter	Character Write file
FileReader	Character Read file

2.3 Read and write file-related code. Critical lines need to be annotated.

Reading books

Write a book

Read user

Write user

3. Code volume Statistics 3.1 Statistics the amount of code completed this week

The weekly code statistics need to be fused into a single table.

Week Time	Total code Amount	New Code Volume	total number of files	number of new files
1	0	0	0	0
2	0	0	0	0
3	472	472	11	11
4	472	0	11	0
5	468	-4	12	1
6	1043	575	30	18
7	2417	1374	51	21st
8	5129	2712	83	32
9	5284	155	89	6
10	5714	430	98	9
11	5995	281	105	7
12	6365	370	114	9
13	6771	50W	120	6

201621123080 Java programming 12th Week of study summary