java programmer certification

1. What is idea?Idea, Java Smart IDE.2. Why should I use it?The advantages of idea:1) Smart Selection2) Navigation mode3) historical records4) Refactoring5) Coding Aid6) Intelligent Typesetting, control7) Smart Code, find, navigate, edit, customizeSummary: Fast, search, analyze, locate, refactor, and efficiently3. How do I use it?1) Remote DebuggingTurn on remote debugging: Catalina.bat JPDA StartJava Remote Debugging2) Plugin modeTasksMyBatis3) Custo

Dark Horse programmer-java basics-Basic Knowledge (3), dark horse java ------ Android training, java training, and hope to communicate with you! ------ 1. Process Control 1. Select structure statements Select a structure statement to execute different statements according to different conditions. Conditional statement

How to become a Java champion programmer? But some programmers have been asking me for career advice. now I think it's time to write another article. As mentioned above, if you have a mind to look at other things-I have already begun recording the terrible food I have cooked on Heinz's Worst Recipes (the Worst recipe for Hines. It's caused by my strong desire to eat-it can be proved by my waist cir

generalize. In short, if it is a dynamic Web page with parameters and this page accesses the database, there is a possibility of SQL injection. If the programmer does not have security awareness and does not perform the necessary character filtering, there is a large likelihood of SQL injection.In order to fully understand the Dynamic Web page answer information, preferred to adjust the configuration of IE. Put IE menu-tool-internet Option-advanced-S

The IT industry is a particularly fast-growing area where each programmer undergoes an iterative process of updating various technologies and tools throughout his or her career.As the saying goes: 工欲善其事, its prerequisite. In the spirit of a single lele is not as many lele (in fact, their forgetfulness) I often want to use the software tools to the official collection together, convenient for everyone to learn progress together.Learn Reference site cla

After the transformation, began to enter the learning time, the following is the collation of learning notes C # and Java some differences between1, = = and equalsIn C #, the comparison of strings can be = = to compare, but in java use = = has always been false, originally in Java = = is used to see whether two references to the same memory address, equals is the

characters, symbols and so on in the computer language.Common computer languages such as C,c++,c#,java4 Man-Machine interactionGraphical interface: This method is simple and intuitive, the user is easy to accept, easy to operate.Command-line mode: You need to have a console, enter specific instructions, and let the computer do some work. More trouble, need to record some commands.5 keyboard function keys and shortcut keystab Jump Bar, ALT + TAB combination shortcut key, can be implemented in th

Java programmer interview book-I ++, java book-IWhat are the output results of the following programs? public class program2 { static { int x = 5; } static int x,y; public static void main(String[] args) { x--; myMethod(); System.out.println(x + y++ + x); } private static void myMethod() { y=x++ + ++x; }}The

Java multi-thread understanding, dark horse programmer, java Dark Horse Public class MultiThread {public static void main (String args []) {System. out. println ("I am the main thread! "); // Create a thread instance thread1 ThreadUseExtends thread1 = new ThreadUseExtends () below (); // when thread2 is created, Thread thread2 = new Thread (new ThreadUseRunnable

Ahead As a Java programmer, why don't I turn to go in a production project?Since Google released the first official version of the Go language in 2009, the language has been popular with excellent language features, especially in situations where high concurrency is required, and everyone will think about whether to use go. Then, in the domestic emergence of a group of seven cattle as a representative of t

Introduced:It is an open source (Apache License) mini-web framework in Java with minimal dependencies and a fast learning curve.The goal of the project is to create an easy-to-use and cracked mini-web framework in Java. Get the project source code, project explanation, knowledge sharing, learning communication, then join the small series of Java Learning

Inherit the dark horse programmer in java and the dark horse in java Implement code reuse through inheritance. All classes in Java are obtained by directly or indirectly inheriting the java. lang. Object Class. The inherited class is called a subclass, And the inherited cla

Black Horse programmer [multithreading in Java], black horse java Multithreading Multithreading in Java First, let's talk about a problem before talking about threads. We know that the principle of Multithreading is that the cpu performs switching operations in different threads, the first thing we think of is definite

roughly on so many foundations! It's simple! This for a real programmer should be not enough, the real multi-threaded to have some grasp, please study java.util.concurrent package it! Master Doug Lea's work, originally a repository of open source conformance programming, was later incorporated into the Java class Library by Sun. The author's website also has another version of the class library! A good thi

Java programmers are really high-income, life-nourishing, a lot of people want to become a programmer.But, after all, it's not easy to be a programmer. Some of the small partners are born without the "attributes" of their own programmers.So, what kinds of people may not be suitable for programmers? Here's a summary:1. No interest in programmingIn fact, to tell the truth, the last point is the most important

But some programmers friends have been asking me for career advice, and now I think it's time to write one more. Incidentally, if you have a mind to look at something else-I've started documenting the horrible food I've cooked on Heinz's worst Recipes (Heinz worst recipe). By my strong desire to eat-this can be proven by my waistline, cooking is a big hobby for me. I am far from being a qualified cook, because I never follow recipes, and many of the foods I cook are discarded in a state of "sadl

A good Java programmer must understand how the GC works, how to optimize GC performance, and how to interact with the GC in limited ways, because there are applications that have higher performance requirements, such as embedded systems, real-time systems, and so on, which can improve the performance of the entire application only if it improves the management efficiency of the memory completely.A good

A.D. In 2050, there was only one Java programmer left in the world. you may have to ask, where are all the other people? The reason is simple, Java is declining.about 2030 years, there has been a language called X, it can do system-level development (operating system, database, compiler), but also to do server-side development, mobile phone, web-side is not easy.

the big guy's springboot architecture to do the company AI official website, payment projects, artificial quality inspection projects .... (This is my own name, a small project, did not become a norm), the basic is crud work, a small amount of maintenance and new features of the development, feel not to improve, coupled with a number of students also job-hopping, pay is also good, so also began the interview ...　　　　Sentiment　　How to say, in this part of the work, learned something is still a lo

, Management: Must be familiar with the use of ant to complete project management of common tasks, such as Project compilation, build Javadoc, build jar, version control, automated testing.7, the wrong: should be able to be based on the abnormal information to locate the cause of the problem and approximate location.8, thinking: Must master the main requirements of OOP, so that the use of Java development system to be a real