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[Java concurrent programming] 8. Various lock concepts, java concurrent programming Updating... Shared lock (S lock ):If transaction T adds A shared lock to data A, other transactions can only add A shared lock to data A, but cannot apply an exclusive lock until all shared locks are released. Transactions authorized

Java classic programming question 50 to 26, java programming 50 Enter the first letter of the day of the week to determine the day of the week. If the first letter is the same, continue to judge the second letter. Public class Example26 {Public static void main (String [] args ){F ();}Public static void f (){System. ou

JAVA Network Programming TCP communication, java Network Programming tcp Socket introduction: Socket is called "Socket", which describes the IP address and port. Hosts on the Internet generally run multiple service software and provide several services at the same time. Each service opens a Socket and is bound to a por

Java concurrent programming Summary 5 -- ThreadPoolExecutor, java concurrent programming practices I. Introduction to ThreadPoolExecutor In jdk1.8, there are four constructors. To ThreadPoolExecutor (int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue 1,CorePoolSize: Core thread poo

Java Interface Programming (5), java Interface Programming This article is my learning notes, welcome to reprint, but please note the Source: http://blog.csdn.net/jesson20121020 After learning about the layout manager and the Swing event model, the rest is the various components of Swing. Next we will start to learn

Java Interface Programming (4), java Interface Programming This article is my learning notes, welcome to reprint, but please note the Source: http://blog.csdn.net/jesson20121020 In the Swing event model, a component can initiate (trigger) an event. The types of each event are represented by different classes. When a

Java Interface Programming (9), java Interface Programming This article is my learning notes, welcome to reprint, but please note the Source: http://blog.csdn.net/jesson20121020 The list box and the JComboBox combo box are obviously different. This is not only reflected in the appearance. When the JComboBox combo bo

Java Network programming notes 6, java Network programming notes In the previous articles, we have known the communication between the client and the server, including the communication between multiple clients and the server. Next we will demonstrate the complete communication process between the client and the server

Java programming consumer and producer, java programming producer Create a new Break class to indicate the number of foods. Public class Break {public static final int MAX = 10; // you can cook up to ten breads at a time. In the creation of a kitchen class, in order to make food or consume food, if there is no food, t

Java concurrent programming instance (synchronized) and java concurrent programming instance Here, we use a small program to illustrate that the logic is a counter (int I). The main logic function is that if resource I is monitored synchronously, no I value is output, however, if the keyword synchronized is not added,

Java basic programming structure and Java programming structure Public is the access modifier)System. out. println (); // wrap automatically after outputSystem. out. print (); // No line break after outputNote: 1. add // 2 to the front of each line. /* content to be annotated */but not in the annotated code */3. /** c

[Practical Java high concurrency programming design 4] Arrays can also be unlocked: AtomicIntegerArray, java concurrent programming practice pdf In addition to providing basic data types, JDK also prepares arrays and other composite structures for us. The available atomic arrays include AtomicIntegerArray, AtomicLongAr

Java programming calculates the day of the year, and java programming calculates You can directly copy and run it. Package year; import java. util. week; public class year {public static void main (String [] args) {// TODO Auto-generated method stub year y = new year (); y.

Java Interface Programming (6), java Interface Programming This article is my learning notes, welcome to reprint, but please note the Source: http://blog.csdn.net/jesson20121020 You can use icons in JLable or any component inherited from AbstractButton. You can use any gif file you want to use. To open a file and ob

50 typical Java programming questions, 50 java programming questions There are n integers, so that the previous numbers are shifted to the next m positions, and the last m number is changed to the first m number. Public class Example36 {Public static void main (String [] args ){Int [] m = {18, 12, 23, 34, 95, 76, 57, 2

JAVA Network Programming and java Network Programming First, summarize the classes required in the learning process: URL-openConnection () URLConnection class-connection () getInputStream () BufferedReader class (buffer Stream) InputStreamReader class-(this class is used to convert InputStream into Reader) Classe

Java programming ideology note (6)-internal class, java programming ideology 1. DefinitionA class is defined inside another class. This class is called an internal class. 2. Link to the peripheral classWhen an internal class object is created, it has a certain relationship with the peripheral object that creates it, so

Java programming style and naming rules, java programming style specifications Basic naming rules Package name The package name is listed gradually based on the domain name range, which is the opposite of the domain name naming rules on the Internet. A group uses "." The identifier of the connection. Generally, the fir

Number of java programming, java programming Question: If a number is equal to the sum of its factors, this number is called "complete number ". For example, 6 = 1 + 2 + 3. Program to find all the completion numbers within 1000. The problem solving process is also very simple: Public class wanshu {int number, value;

Datagrampacket (Str.getbytes (), Str.length (), Inetaddress.getbyname ("localhost"), 9000); All information is saved using BUF System.out.println ("Send message. ");d S.send (DP);//Send information out ds.close ();}};Client:Import java.net.DatagramPacket; import java.net.DatagramSocket;p ublic class udpclient{public static void Main (String Args[]) throws exception{//all exceptions throw datagramsocket ds = NULL;//define object to receive datagram byte[] buf = new byte[1024];//Open space to rec