deep learning framework java

quickly finds its contents by Hashcode, and all the elements in TreeMap are kept in a fixed order, orderly. HashMap is the best choice for inserting, deleting, and locating elements in a map. But if you want to traverse the key in natural order or in a custom order, TreeMap is better. The implementation of Hashcode () and Equals () is clearly defined by the key class that is required to be added using HashMap. TreeMap has no tuning option because the tree is always in equilibrium.

. static synchronizedSortedSet(SortedSetReturns a synchronous (thread-safe) ordered set supported by the specified ordered set. Conversion principle:List List = new ArrayList (); List = Mycollections.synlist (list);//Returns a synchronized ListClass mycollections{public list synlist (List list) {return new MyList ( list);} Private class MyList implements List{private List list;private static Final Object lock

[] args) {//the ordered setlinkedhashsetNewLinkedhashset(); Link.add (1); Link.add (2); Link.add (3); Link.add (4); System.out.println (link); //[1, 2, 3, 4] }}Some questions about hashcode and equals are asked in the interview:1. Two objects have the same hash value, does the Equals method always return true? Not necessarilyDepending on how to override Equals, if the override fixed it returns false, the result must be falseThe 2.equals method returns True, so the hash value must be th

Create a new project and add support for the databaseDownload MySQL Driver pack mysql-connector-java-5.1.7-bin.jar, shortcut key ctrl+alt+shift+s, add jar package to ProjectWriting Test Text Jdbctemplatedemo.java1 PackageCom.jdbc;2 3 Importorg.junit.Test;4 Importorg.springframework.jdbc.core.JdbcTemplate;5 ImportOrg.springframework.jdbc.datasource.DriverManagerDataSource;6 7 Public classJdbctemplatedemo {8 @Test9 Public voidAdd () {TenDriverman

First, quartz learning Java Framework Introduction: Quartz from beginner to advancedHttp://edu.yesky.com/edupxpt/233/2209233.shtmlExample: http://javacrazyer.iteye.com/blog/675460http://blog.csdn.net/lotusyangjun/article/details/6450421Official website: http://www.quartz-scheduler.orgSecond, Scheduledthreadpoolexecutor studyJDK5 after

use:Wsdl2java 　　　　 -Thed parameter, which specifies the code -generated catalog　　　　 -p parameter, specifies the new package structure that is generated. Examples of how to use:Wsdlwjava-d. -P com.kdyzm.ws.cxf.server http://localhost:9090/ws?wsdl　　　　Third, CXF integration springNow it's clear, what everything has to be integrated with sprig, hibernate can not be used, because there are many similar frameworks to use, such as the MYBATIS;STRUTS2

for serialization, the serialization mechanism will serialize the object returned by the method. throws Objectstreamexception;As described above, it is possible to know that the Java serialization mechanism calls the WriteObject method of the serialized object before it is written to the file, and then calls the Writereplace method, which corresponds to the last time the object is read from the file. Calls the ReadObject method and then calls the

1. Crawler classification: Distributed and standaloneDistributed is mainly Apache Nutch framework, Java implementation, rely on the operation of Hadoop, learning difficult, generally used only to do search engine development.Java stand-alone frameworks are: WebMagic and Webcollector, and crawler4jPython stand-alone frame: Scrapy and Pyspider2. In the official tut

; PrivateInteger age; PrivateCar car; publicString getName () {returnname; } public voidsetName (String Name) { this. Name =name; } publicInteger getage () {returnage ; } public voidsetage (Integer Age) { this. Age =age ; } publicCar getcar () {returncar; } public voidSetcar (car Car) { this. Car =car; } @Override publicString toString () {return"person [name=" + name + ", age=" + age + ", car=" + car + "]"; } }BeanID= "person"class= "com.oneline.spring.day01.Person">

Attach a Java collection frame diagram first.As you can see from the frameset above, the Java Collection Framework consists of two types of containers, one set (Collection), one collection of elements, the other is a graph (map), and a key/value pair mapping is stored. Collection interface also has 3 seed types, List, set and queue, and then the following are som

With the deepening of Java learning, feel big for a year of ACM, it is smart, Java a lot of data structure, algorithm class things, it is much easier to understandThere are two major sub-categories under set set to develop common HashSet collections, TreeSet collectionsThe elements of the set set are non-repeating and unorderedFirst, HashSet collectionAPI documen

Java concurrent packet source code learning-AQS framework (2) CLH lock queue and spin lock, aqsclh As mentioned in the previous article, AQS is based onCLH lock queueSo what is CLH lock queue? complexity is complicated, simple, and simple. The so-called greatest truths are simple: CLH lock queue is actually a FIFO queue, and each node (thread) in the queue only n

Spring is an open source, lightweight, one-stop framework.Spring Core two main parts AOP: Aspect-oriented programming, extended functionality is not a modification of source code implementation IOC: Control inversion, such as a class, there is a method in the class (not a static method), want to invoke the method inside the class, the general method is to create the object (new one), through the new object called method. When using the spring framew