beginning programming with java for dummies

Java Good programming habits 1. Comments should be added at the beginning of each procedure to explain the purpose of the program, the author and the date and time when the program was last modified. 2. Use blank lines and spaces to enhance the readability of the program. 3. By convention, the first letter in the class name identifier is capitalized, and the firs

Now that we are in the 21st century, it is hard to imagine that Java-related books are so scarce, but this is just the case with Java. All the Java-related books were basically published by several Sun engineers, such as the "Hooked on Java" written by Arthur Van Hoff et.al and "The

). Flexibility. The basic data type data can be encapsulated into a wrapper object of that data type. 2 (1). The collection class holds objects that are instances of the object class, and once an object is placed in the collection class, its class information is lost, which is intended to be universal (2) of the collection class. The Objectl class is a superclass of all collection classes and can be generic, but re-sculpt. This is a common interface in the collection framework:Where collection i

Java programming 57-object-oriented Basics Chen yuefeng, Zhengzhou game college From:Http://blog.csdn.net/mailbombChapter 8 object-oriented In a program, the core is the data structure and algorithm. Different programs need to design different data structures as needed, and then rely on the functions of the program and the data structure to design the corresponding algorithms, this design method is the unde

Source: http://www.cnblogs.com/dolphin0520/p/3920373.html Java concurrent Programming: volatile keyword parsing Volatile this keyword probably many friends have heard, perhaps also all used. Before Java 5, it was a controversial keyword, because using it in a program often resulted in unexpected results. After Java 5,

20165218 2017-2018-1 "Java program design" The third week study summary textbook Learning summary-fourth chapter class and object oriented object language The first thing to do when you need to do something is to think about who is going to accomplish the task, which object is going to accomplish the task, and what the data is about. ———— "Java 2 Practical Tutorial" P51 Three properties of obj

+greferences in the global workspace ctrl+shift+gtext Editingscope function shortcut keystext Editor overwrite toggle InsertText Editor Roll line ctrl+↑The text editor scrolls the line ctrl+↓filescope function shortcut keysGlobal Save Ctrl+xCtrl+sGlobal Print Ctrl+pGlobal shutdown Ctrl+f4Global Save All Ctrl+shift+sGlobal all off Ctrl+shift+f4Global Properties Alt+enterGlobal New CTRL + NProjectscope function shortcut keysGlobal All Build ctrl+bSource Codescope function shortcut keysJava Editor

[Java concurrent programming] 22. Exchanger source code parsing and exchanger source code Exchanger is a two-way data transmission. Two threads exchange data at a synchronization point. The first thread will wait for the second thread to execute exchangeSynchronousQueue is a one-way data transmission between two threads, one put and one take. Here is an example of how to use Public class ExchangerDemo {publ

JAVA programming (11) ----- face the object elementary design Mahjong creates Mahjong cards and then shuffling the cards to deal with them ~ Well, that's it. ZzzzZZZZ 1. At the beginning, I still wanted to map objects ...... This is a mahjong Package com. lovo; import java. awt. graphics; import

Through the study of the First chapter, I have a deep understanding of the unfamiliar words of Java. I understand Java's emergence, history, strengths and weaknesses, and its future. In the first chapter of the study, I encountered the problem is that many professional terminology is very unfamiliar, so look at the book to feel very laborious. I think I should read more about Java-related professional boo

Time flies, soon, this semester will soon be over, this is the first year since the beginning of a course to write a summary, is also my first time to summarize into two parts.The first part, is my summary of the first half of the semester, because used to teach me to listen, because the aversion reversal class, because the thickness of the book and knowledge of the complexity of my fear, I in the first half of the semester on the

Java Socket Network programming heartbeat design Concept1, generally used to determine the other side (equipment, process or other network elements) is normal movement, the general use of timing to send a simple communication packet, if not received in the specified time period of response, the other side has been taken off. Used to detect an abnormal disconnection of TCP. Generally used to determine the ot

In- depth parsing of I/O programming file access classes reprint please indicate source:http://blog.csdn.net/u012637501( embedded _ small J Sky ) before we start learning the byte stream class, let's take a look at the class-file class related to the file. The file class is the only object in the IO package that represents the disk file itself , and the fileclass defines a platform-independent way to manipulate files , and by invoking the various

201621123080 Java programming 12th Week of study Summary 1. This week's study summary 1.1 summarizes multi-stream and file-related content in the way you like (mind mapping or other).2. System-oriented integrated design-Library management system or shopping cartUse streams and files to transform your library management system or shopping cart.2.1 A brief description of how to use streams and files to transf

,inetaddtress address,int Port) : Contains the length byte of the array data from the beginning of offset, and the address and port are constructed using the constructor method without parameters Datagramsocket () to create an object that is responsible for sending packets Datagramsocket mail_out=new Datagramsocket (); The object is created, and then the object Mail_out uses the method receive (Datagrampacket pack) to accept the packet remote interfac

Although there were only two programming questions this week, I sat in front of the computer the same day as I had a few weeks ago. But it is gratifying that the two procedures I have done independently, feeling a lot of harvest, and the first few weeks of the feeling is not the same, no longer simply read the code, programming problems a little more difficult will not, only as far as possible to complete t

. String---> Byte streamCombines the functions of both bufferedwriter/outputstreamwriter2. can automatically refreshNew PrintWriter (os,true);UDP User Data Message Protocol-------------------------------------------1) Consider the efficiency of data transmission, reliability is not guaranteed2) Not necessarily a one-to-many communication, such as broadcasting3) non-connected, unreliable transmission modeDatagramsocket responsible for sending and receiving data such as the PostmanDatagrampacket d

(Hexstr.substring (i * 2, I * 2 + 1), 16); intLow = Integer.parseint (Hexstr.substring (i * 2 + 1, I * 2 + 2), 16); Result[i]= (byte) (High * 16 +Low ); } returnresult; }}"Experimental Experience" The understanding of the experiment process, the understanding of the knowledge point in the experiment instruction book. This experiment is mainly to practice in the existing code on how to implement the function in the same program, the teacher before the expe

and scalability. So in fact, we can also change the phrase: "For the Super Type Programming", the super-type is usually an interface or an abstract class.In fact, this is for interface programming (Interface-oriented programming), which separates the design from the implementation. In an object-oriented system, the various functions of the system are accomplishe

Original link:http://ifeve.com/java-copy-on-write/　　Copy-on-write abbreviation Cow, is a kind of optimization strategy used in program design. The basic idea is that from the beginning everyone is sharing the same content, when someone wants to modify the content, it will really copy the content to form a new content and then change, this is a delay lazy strategy. Starting with JDK1.5