kickoff book summary

. Single Case mode and multithreading(1) Load now/a hungry man modeImmediate loading is when the object is created using the class, and the common implementation is the new instantiation.public class myobject{private static MyObject myobject=new MyObject ();Private MyObject () {}public static MyObject getinstance () {Return MyObject}}(2) Lazy loading/lazy modeThe instance is created when the getinstance () method is called, and the object is instantiated in the method.public class myobject{priva

has not been shipped becomes a shipment, it is actually the status of the update order . All orders that have not been shipped and all orders that have been shipped are actually retrieved for all orders of different states . In the DAO layer, the parameters we need are often single , either specific objects or IDs ... However, in the service layer, the parameters we want are connected to the entity class . Example 1: When generating an order, theDAO layer simply needs the order obj

The book is generally finished, but the seventh chapter is not in a hurry to end.But fortunately it is finished, barely count it.Recall this year, quite feeling, the heart has been seeking progress, but it is very difficult to act up.Think about it indeed ah, want to always progress must sacrifice their spare time, although not to exclude learning, but you have to admit that the feeling of paralysis is very good.Man, there's really nothing to stop, an

Last year has been doing a book on the collection of the app, there are about this app currently has a ' sun study ', but there is no use of image processing related knowledge, only a sweep ISBN code entrance, or manual entry ISBN; there is a ' Shelfie ', not only can sweep the book code, and can be directly to the bookshelf to take pictures, to identify, although the speed is a bit slow, but the accuracy i

still ignorant of the years.How many people have worked in the software industry for many years, and how many people involved in a variety of cool framework development, system development? How many architects can lead parallel development of systems with more than 50 people? Or, we ask ourselves, how many lines of code have been wasted in order to cater to design patterns, how much complexity has been added, and how much training costs have been increased?This is what I said in the comments, o

Viewing routing informationHost name and IP address mappings in the /etc/hosts fileVi/etc/hostsSSH -based file Transfer protocol:sftp SCPSecure FTP:sftpCopying files using ssh :SCP TelnetOne:linux to LinuxInstall Openssh software first on remote linux ,Openssh is linux SSH Server / Client Tools1 installing sudo apt-get install ssh2 starting sudo/etc/init.d/ssh startTelnet Server: If the chennan user exists under a remote server1 Login : ssh-l chennan 192.168.10.12 Login port:ssh-l chenn

PreparedStatement pstmt=con.preparestatement (SQL); Pstmt.setstring (1, Book.getbookname ()); Pstmt.setstring (2, Book.getauthor ()); Pstmt.setstring (3, Book.getsex ()); Pstmt.setfloat (4, Book.getprice ()); Pstmt.setstring (5, Book.getbookdesc ()); Pstmt.setint (6, Book.getbooktypeid ()); Pstmt.setint (7, Book.getid ()); returnpstmt.executeupdate (); //Return value is the number of paths affected } Iv. Data deletion: /*** Book Information delet

This article summarizes a comprehensive variety of PHP learning resources, including books, websites, articles, etc., to help you improve PHP development capabilities, consolidate PHP knowledge. Combined with the previous article "heavy material." GitHub on the PHP resources summary, you will be able to make your PHP technology up a step. Welcome to the vast number of PHP enthusiasts collection and learning. PHP Site --php related to helpful websitesP

Welcome to my new blog address:http://cuipengfei.me/The end of 2014 will require some summary.Since the summary is written on the blog, the first one is to say a blog first.BlogIn 2014, 18 blogs were written, of which 15 were related to Scala and were thought to have only dry goods.I am quite satisfied with this.But this number is deceptive, with 15 Scala blogs, of which 4 were written in January, 6 written in June, and the rest were written in the ot

Summary of JAVA programmer interview book-let's talk about my understanding September 7, 2014 I started reading this book today and ended the systematic training at the intermediate level of the algorithm in the original plan. I think let's take a look at the interview questions first. Let's drop this book A first. I h

)ReturnFalseif (!document.getElementById (ElementID))ReturnFalsevar elem=document.getElementById (ElementID);if (elem.movement) {cleartimeout (elem.movement);}if (!elem.style.top) {elem.style.top ="0px"}if (!elem.style.left) {elem.style.left ="0px"}var xpos =parseint (Elem.style.left);var ypos =parseint (Elem.style.top);var dist =0;if (xpos = = final_x ypos = = final_y) {ReturnTrue }if (Xpos Math.ceil ((Final_x-xpos)/10); xpos = xpos + dist; }if (Xpos > final_x) {dist =math.ceil ((final_x-xpos)

enterprise, the other is that you are afraid of competition. But in fact, both of these things are electric fences without electricity. I think the answer to this conundrum is that creators should find a "daily job" that feeds their families. This noun was originally used by musicians accustomed to performing at night. It means: You do a job to make money, another job is because you like it. There is a good way to judge whether a person has the ability to "think in a position", and that

: "Programmers are said to have a dream to change the world: programming magic and full of power, countless young people join in, with dreams and thinking to change the world." "For us to have such a dream and to realize the joy and satisfaction in the realization of the dream, then no matter what the outcome, it should be a very happy thing."Due to the rigid requirements of the job, it is not free to choose the progress of reading. "Dream Broken Code" although read, but I think also will be in

and deserialization, PHP has two hook functions (hooks) __sleep () and __wakeup () for objects. Serialization is called before the __sleep, which can perform some cleanup work, such as closing the database connection, outputting unsaved persisted data, which returns an array of names of data members written to the byte stream, and if an empty array is returned, no data is written to the byte stream. The __wakeup () is called after deserialization, which can perform some initialization operation

A few days ago Zhou Yun Teacher held a book meeting for us, according to the Convention, write a summary ~Reading the upper half of the main talk about team building problems, several experienced seniors also exchanged their own experience, which Chen Xuzhan seniors with personal experience explained the importance of team division of labor, team members to do their own work to achieve maximum efficiency An

45th: Use the hasOwnProperty method to avoid prototype contamination 46th: Use arrays instead of dictionaries to store ordered collections 47th: Never add an enumerable property to the Object.prototype 48th: Avoid modifying objects during enumeration 49th: Array iterations should prefer a for loop instead of a for...in loop 50th: Iterative methods are better than loops 51st: Reusing a common array method on a class array object 52nd: Array literals are better tha

on the day to see the topic, if you have not tried to summarize the algorithm, if you encounter the data structure has not been seen to accumulate, will someday be useful.Another thing is, I really do not want to brush the game, I feel no meaning, I think the problem solving is two things, one is exercise thinking, one is to make happy on the line. If I look at everything too utilitarian, I feel that it loses its meaning.Come on, by the way, English and Java part is not broken, English will res

The following is the "high-performance Linux server Building combat Ⅱ" a book or typographical errors, if found to have related error information, I will be published here, but also hope that you can find the error message to me, thank you for the support of readers! Your support is my greatest power to improve the book!1, 30th pageSecond Small segment: 2, install ChkrootkitWill[[email protected] ~]# make s

_ Get _ priority _ Max () returns the maximum and minimum precedence for a given scheduling policy 2. System calls related to processor bindings Linux Scheduler provides mandatory processor binding mechanism In a CPUs _ allowed bitmask in a task _ struct Sched_setaffinity () sets a bitmask of different combinations of one or several bits Sched _ Getaffinity () returns the current cpus_ allowed bit mask 3. Discard Processor TimeSched_yield () lets the process expli

=new properties (); Creates a Properties object. P.load (DBUtil.class.getClassLoader (). getResourceAsStream ()); It is common to get static resources and configuration files through class loading. P.getproperty ("xxx"); Read the parameter values for the file. 　　(2) Create the corresponding entity based on the entity class DAO class 　　(3) Special use skills * When querying a table with an indeterminate number of query conditions, It is a good idea to create a string buffer class to continual