Java

Cyclicbarrier, the name is a circular fence, the fence is obvious is to stop a bunch of "things", where "things" is a thread, when the number of threads specified by the fence is not reached, all the threads wait, to reach the specified number,

Function Introduction Authentication: Identity Authentication/Login, verify that the user has the corresponding identity;Authorization: Authorization, which is permission authentication, verifies whether a authenticated user has a

Http://developer.51cto.com/art/200903/117512.htmXML has now become a universal Data Interchange format, its platform-independent, language-independent, system-independent, to the data integration and interaction brought great convenience. The syntax

--------------Testbeanpackage Lh.demo.bean;public class Testbean { private string username; private string Password; private string Age; public Testbean () { } public Testbean (string _username,string _ Password,string _age) {  this.username =

UDP transportThere are two main types of UDP, the sender and the receiver, Datagramsocket, DatagrampacketEstablish the sending and receiving endSet up a data packageCall the receive send method of the socketClose socketNote: The sending and

public class Samestring { //thought two: Each character corresponds to its own ASC code, the first idea of the algorithm complexity of O (Nlogn), can generally use space to reduce the complexity of time//can open a size of 256 array space, and 256

1. Making Gobang Game softwareBecause the teacher has been basically finished, the time to redo a lot faster ... But I still feel the confusion of thinking ... Which way on which side first, which method in which side of the good question too

This method, when acquiring simple interest, avoids the thread lock, resulting in a slow access to the method,The same is, prevent multi-threaded colleague House This method will produce multiple instances of the problem.High efficiency and thread

Here are some ideas on how to get IP addresses in Java.1, directly using the Java.net.InetAddress class to obtain, but this method is only valid in the Windows environment, in the Linux environment can only obtain the localhost address (that is, the/

Learning Java for more than a year, a lot of basic knowledge is understood, some know how to use, but do not understand, it is how to come.Often in the book to see the introduction class inside the construction method, static methods, common methods

1 PackageCom.javaee.corejava;2 /**3 * Thread-safe single-case mode4 * @authorMIAOYF5 *6 */7 Public classSingleton {8 /**9 * private static constant single-instance objectTen * Volatile: One * used in multi-threading, synchronous variables.

Import Java.util.*;import Java.io.*;class user implements serializable{public String name;public int age;public User ( String str,int num) {name=str;age=num;} Public String toString () {return ' Name: ' +name+ ' \ n ' + ' Age: ' +age;}} Class Test

Compilation Environment:Operating system: Win8.1 64-bitIDE platform: Visual Studio UltimateFirst, the principleThe distance s1,s2,s3 is observed on the point p to be measured, and the plane coordinates of P are determined:Second, the Code

The simple explanation is:Short connection: Establish a connection, send a packet, close the connectionLong connection: Establish a connection, send a packet, send a heartbeat packet, send a packet, send a heartbeat packet, send a heartbeat packet ..

The following is a basic sorting algorithm in 7 of the data structures implemented in Java code:(1) Direct Insert sort/** Direct Insert Sort **//** array is a reference type, element value will be changed **/public static void Insertsort (int[]

When engaged in ACM encountered large number multiplication problem, on the Internet to find a bit, saw a C + + version of thehttp://blog.csdn.net/jianzhibeihang/article/details/4948267Made a version of JavaHere's the idea.The number is received as

Just wrote a section of code, the content is as follows: public class Learnhashcode {public static void main (string[] args) {String S1 = "ABC"; String s2 = "ABC"; System.out.println (S1==S2); TrueSystem.out.println (s1.equals (S2));

JAVA learning 58th-GUI GUI Graghical User Interface (graphical User Interface) The objects provided by java for the GUI are included in the java. awt and java. swing packages. Java's GUI does not do anything like C ++, and does not waste too much

Difference between Hibernate-list () and iterate () methods, hibernateiterate For the list method, Hibernate uses a Select SQL statement to obtain all records. And read it and enter it in POJO to return it.The iterate method first obtains the IDs of

Binary tree traversal There are three methods to traverse a binary tree: (1) first traverse (DLR), first visit the root node, then traverse the left subtree, and finally traverse the right subtree. Note root-left-right. (2) In the middle-order