Java (4) -- IO stream, java -- io stream(1) Java Stream Input/Output Principle:
In a Java program, input/output operations on data are performed in the stream mode to obtain different types of data. The program inputs or outputs data through standard methods.
(2) java. io abstract stream classification:
Node stream and processing stream:
The node stream ca
What is io:(input/output): input and output.IO device: a device that communicates with a computer.input device: microphone, scanner, keyboard, mouse and so on.output Devices: monitors, printers, projectors, headphones, audio, etc.Why does the program need IO ?Case 1: Play game operation, score higher, store game information.In this case, you need to store the data in the game and only store it in the file.C
J2SE quick advanced -- IO stream, j2se advanced io
Concept of IO stream
An IO stream is an abstraction that flows data from one place to another, just as a flow of water flows from one end of the pipeline to the other. In a program, all data is transmitted and saved as a stream.
All the stream classes provided by JDK
Excerpted from http://blog.chinaunix.net/uid-26565142-id-3051729.html1, the file IO function , in Unix, has the following 5: Open,read,write,lseek,close. Known as IO without cache (unbuffered I/O). Without caching, each read,write is called by a system call in the kernel.2, standard IO library , described by ANSI C standard. The standard
The use of MPI-2 parallel IO, mpi-2 parallel io
The MPI program needs to use parallel IO to operate files, but du Niang does not find many methods to use parallel IO functions. Finally, I found some useful papers on zhiwang. After reading them, I felt very open.
MPI-1 operations on files are carried out by using the fu
Java asynchronous IO and java asynchronous io
The key points of the new asynchronous functions are some subsets of the Channel class. The Channel needs to be switched to a background process when processing IO operations. You can use this function to access large, time-consuming operations or other similar instances.Here, we will only explain the AsynchronousFile
Server performance indicators
As a network server program, performance is always the first indicator. Performance can be defined as the number of tasks that can be processed in a given hardware condition and time. The server design that maximizes the use of hardware performance is a good design.A well-designed server should also consider the average service. For each client, the server should provide the average service to each client, so that a client cannot be served for a long time and the se
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Serialization, deserialization, and IO serialization of Java-io stream objects
Basic serialization operations
1. Object serialization means to convert an Object into a byte sequence, and vice versa.
2. The ObjectOutputStream and writeObject methods are used to write objects to the output stream;
The deserialization stream (ObjectInputStream). The readObject method is used to read objects from the input s
JDK source code reading (1) _ introduction + java. io, jdkjava. io
1. IntroductionFor this forum, I will take a Java 8 source code reading note. Some java packages that are widely used in java Web are intensively read with comments attached. Compare and analyze confusing knowledge points.The source code sequence of Intensive Reading is as follows:(1) Part 1: This part is the most common java development pac
Java io stream learning and Java io stream
I have carefully studied Java I/O streams in recent days. I was planning to watch videos and learn through videos. However, I found that videos are not easy to understand, so I learned the Java io stream through Baidu and api documentation.
Io streams can be classified into t
Five I/O modes-blocking (default IO mode), non-blocking (common language pipeline), I/O multiplexing (IO multiplexing scenario), signal I/O, asynchronous I/OFive I/O modes:"1" Blocking I/O (I/O operations under Linux are blocking I/O by default, that is, open and socket created I/O are blocked I/O)"2" non-blocking I/O (can be set to non-blocking I/O by using the O_nonblock parameter with FCNTL or open)"3" I
Asynchronous Io, APC, Io completion port, thread pool, and high-performance server (APC)Alertable Io provides a more effective asynchronous notification format. Readfileex/writefileex provides a callback function (APC process) when sending an IO request. After the IO request
Java-IO basic class memories and java-io basic memories
For Java I/O, I have already learned this basic category in college, but I forgot about it. So I am going to write a blog, let's take a look at all these things and sort them out.
First, use a picture on the Internet:
Vertical streams are divided into byte streams and byte streams. Horizontal streams are divided into read and write streams.
In this fig
Talking about python asynchronous IO, synchronous IO, threads and processes ~, Pythonio
[The code in the article is not indented. When I first started using the blog, it will be optimized later ~]
The threads in the main thread can communicate with each other, but the sub-processes in the parent process cannot actively communicate with each other. However, the sub-process can also achieve communication, you
1. Introduction of NiO (New io stream)JDK4 appears nio. The new IO and the traditional IO have the same purpose, are used for the input and output, but the new IO uses a different way to handle the input and output, in a memory-mapped file, the file or a section of the file map into memory, you can access the same memo
Broadcast messages of socket. io in node. js, node. jssocket. io
After multiple clients establish a connection with the server. the io () server has a sockets attribute. The attribute value is all socket objects connected to the client. you can use the send method or emit method of this object to broadcast messages to all clients.
Today to review the basic IO, which is the most common IO.
Basic knowledge and concepts of network IO
General IO and Bio server
Use of NiO with server Hello World
Netty Getting Started with server Hello World
Netty in Layman's
Input stream and output streamJava input and output strea
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