Java

MicroServices architecture Mode (Microservice Architect pattern). Nearly two years of crazy growth in services and advances in cloud computing technology have focused on microservices architectureA microservices architecture is an architectural

Reprint Please specify source: http://www.cnblogs.com/skywang12345/p/3534050.htmlSemaphore IntroductionSemaphore is a count semaphore, and its essence is a "shared lock".The semaphore maintains a semaphore license set. A thread can obtain a

Using Java code and annotations to complete the spring configurationUse Java code and annotations for spring configuration.Personal Understanding: You can use the XML file configuration when you use spring, or you can use Java code

1. Minimizing the accessibility of classes and membersA. Encapsulation (data privatization, method openness)/externally available callable, stable functionsB. Accessibility should be clear Modifier This class Same

One of the most experienced Java developer features is being adept at using existing wheels to build cars. Joshua Bloch, author of effective Java, once said: "It is recommended to use the existing API to develop, rather than reinvent the wheel." In

Problem Difficulty: EasyTopic:Given a sorted array, remove the duplicates in-place such that each element appear only once and return the new L Ength.Do not allocate extra space for another array, you must does this by modifying the input array

First, unusual precautionsSimply sort out the following specification for exceptions:1) in the exception handling module should provide accurate, easy-to-read error cause information.2) do not handle exceptions that can be avoided.3) A method should

OverviewA regular expression is a powerful string processing tool that enables you to find, extract, split, and replace strings.Several methods of the string class need to rely on support for regular expressions. Method Method

Note: In order to avoid adding null to the array and collection, it is also possible to reduce unnecessary null pointer exceptions, usually in the business to return a zero group or an empty collection.Method:1. Array:Define global static constants

1.1 usually traverse a map like thismap items = new hashmap<> (), Items.put ("A", "ten"), Items.put ("B"), Items.put ("C", 30); Items.put ("D", +); Items.put ("E", "a"), Items.put ("F", "a"); for (map.entry Entry:items.entrySet ( ) {

The automatic boxing and unpacking is introduced from Java 1.5 to automatically convert the original type value to the corresponding object. The automatic boxing and unpacking mechanism allows us to use primitive types or object types more simply

Because the recent project needs to bulk upload files, and here the batch is to compress the file in a zip package, and then read the file to parse the contents of the file.Therefore, the uploaded zip package needs to be decompressed first. The

Intellij IDEA graphic tutorial for configuring springboot, intellijspringboot Introduction to IntelliJ IDEA IDEA, short for IntelliJ IDEA, is an integrated environment for java Development. IntelliJ is recognized as one of the best java development

Ajax reconstruction steps and Ajax reconstruction steps Ajax Refactoring can be roughly divided into the following three steps. 1. Create a separate JS file named AjaxRequest. js, and write the code required to refactor Ajax in the file.The Code is

Java array declaration methods and java array declaration MethodsJava array definition declaration methods: 1. type name [] variable name = new type name [length]; 2. type name [] variable name = {?,?,?}; 3. type name [] variable name = new type

In Java, the URL implements breakpoint download and java breakpoint download. Copy codeThe Code is as follows:URL ur = new URL ("http: // localhost: 8080/first/he.txt ");HttpURLConnection conn = (HttpURLConnection) ur. openConnection (); // URL.

Review triggers thinking about the singleton mode and review triggers the example mode. One situation found during code debuggingThat is to say, when I check the connection of memcached, I find that it is always around 100. Of course, this seems to

Java concurrent series of AbstractQueuedSynchronizer source code analysis (exclusive mode ), In the previous article "Java concurrency series [1] ---- brief analysis of AbstractQueuedSynchronizer source code analysis", we introduced some basic

Java Sorting Algorithm (1): Overview, java Sorting Algorithm Overview Java Sorting Algorithm (I) Overview Sorting is a very common operation in program development. After sorting an arbitrary set of data elements (active records, you can turn them

Java color tile Programming analysis, java Tile Niu prefers color items, especially color tiles. Niu's room is covered with L square tiles. There are four possible colors for each brick: red, green, blue, and yellow. Given a string S, if the I-th