Java

Course review:Flow:Conversion Flow: Conversion of characters and bytesObject flow: serialization, deserializationPrint Flow: Print data of various data typesToday's content:Data stream: Supports writing out the basic data type, byte stream,

java prevents SQL injectionIntroduction to SQL Injection:SQL injection is one of the most common attack methods, it is not the use of the operating system or other system vulnerabilities to achieve attacks, but the programmer because not good

First, method overloading In the same class, an overload is formed between two multiple methods with the same method name and a different parameter list! Overload calls the method, it is based on the arguments you pass, to determine exactly

Vectors can be used to achieve an automatically growing array of objects.Java.util.vector provides a vector class (vector) to implement a function similar to a dynamic array. There is no concept of pointers in the Java language, but if you use

ObjectiveThe previous article mainly describes the file character input stream filewriter, file character output stream filereader, file byte output stream fileoutputstream, file byte input stream FileInputStream, these are common flow classes. Of

Recently in the study of IO technology always appear garbled problem, finally ask the big God only know is the file encoding different to lead to garbled. In order to avoid the next garbled, here on the coding problem to do a summary, because I

In Java, there are several ways to get the total number of rows in resultset.First: Use ResultSet's GetRow method to get the total number of resultsetStatement stmt = con.createstatement (resultset.type_scroll_insensitive,resultset.concur_updatable);

Java Network programmingThinking before class1. What is the TCP/IP protocol?2. What are the two transport protocols for TCP/IP and what are the characteristics of each?3. What is a URL?4. What is the relationship between URL and IP address?5. What

First, the life cycle of the JVM:1) The program starts executing, he runs, the program stops, and it ends. There are several programs in the execution, there are several virtual machines at work. As long as there are normal threads executing in the

1. Direct Ordering: public static void selectsort (int [] arr) { for ( int x = 0; x for (int y = x + 1; y if (Arr[x] > Arr[y]) { int temp = Arr[x] ; ARR[X] = Arr[y];

http://www.jianshu.com/p/26f19095d396 backgroundThe production environment may have a variety of problems, but these problems are not caused by the program error, may be a logical error, it is necessary to obtain the program runtime data information,

Import Java.util.HashSet; Public class JPTQuestion3 { publicstaticvoid main (string[] args) { New HashSet (); for ( short i = 0; i ) { shortset.add (i); -1); } System.out.println (Shortset.

The realization of HashSetFor HashSet, it is based on HASHMAP implementation, HashSet the bottom of the HashMap to save all the elements, so HashSet implementation is relatively simple, view the source code of HashSet, you can see the following code:

How Tomcat works-V. tomcat startup (4), tomcatworks The preceding three steps show that the tomcat listening port finally receives the request.Directory Connector Http11Protocol JIoEndpoint Summary After the previous Initialization is complete,

[Reprinted] install the eclipse plug-in and reprinted the eclipse plug-in Original article: http://blog.csdn.net/dylan619/article/details/46839941 After too many plug-ins have been installed in eclipse3.7, the installation of m2e fails. Therefore,

JVM tuning summary, jvm Tuning   Heap size settingsThe maximum heap size in JVM has three restrictions: the data model (32-BT or 64-bit) of the relevant operating system; the available virtual memory limit of the system; and the available physical

Nginx: nginx-http-concat module, nginxhttpconcat Github address: https://github.com/alibaba/nginx-http-concat/tree/master Let's briefly describe the installation of the new module on the Internet and re-compile nginx. I have not tried to add the

Java Web Learning Series-create a Web project using Maven under MyEclipse for Spring, myeclipsemavenCreate a Maven Web Project Create a Maven project in Eclipse Select the project type and select maven-archetype-webapp from Artifact Id. Enter

WebService notes-Schema constraints, webservice-schema Schema Constraints As the saying goes, good memory is worse than bad writing. After reading the WebService video, I think I still have to take notes. Video address to watch: http://edu.51cto.com/

Dubbo console installation, dubbo Console The download path provided by the official website does not seem to be available, I am also looking for the package online, now provide download path: http://pan.baidu.com/s/1nvPHQvZ Download it,