java programmer ii

1: String(1) A sequence composed of multiple characters, called a string.In life, many data descriptions use strings. In addition, we will operate on it.Therefore, java provides such a class for our use.(2) create a String objectA: String (): No parameter constructionString s = new String ();B: String (byte [] bys): transmits a byte array as the parameter.Byte [] bys = {97,98, 99,100,101 };C: String (byte [] bys, int index, int length): converts a par

interview and other books? First of all, I work in this company so far is still relatively happy, the boss is more open-minded, allowing me to play in the module I am better at, so there is no intention of leaving, but in case of resignation for some reason? The short-term effect of this book can not only supplement the basic knowledge, but also better face the possibility of leaving the situation, and then chose this book to read.I will read this book at the same time, will I think there is a

it's just simple mutual Code Block 2; // no order is required for rejection } Else { Code block 3; } The following code SwitchStatement: Switch indicates the switch. The variable can beByte, short, Int, Char, BooleanThe data type of. A case must be followed by a constant expression. There can be multiple cases, but they cannot be the same. The order is not limited. The default statement is executed when none of the case statements are met and can be placed anywhere. The break stat

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

"Editor's note" Java is almost an introductory language for many programmers, and is also a popular programming language in the world. Andreas Kull, a foreign programmer, has compiled a very good Java development resource on GitHub and recommended it to everyone. Translation completed by importnew-Tang Yuhua. The following is a list of specific resources. Build

, 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

Program | programmer At present, Java is a developer's hot pet, many forums have a lot of love Java developers, but also many want to become Java programmers, but do not know how to learn, it is not clear what to learn what knowledge to become a Java

CloudDocker and VirtualizationMicro-Service ArchitectureV: Performance OptimizationAny out-of-details PPT Architect is bullying, up can be a strategist, down to solve the first-line performance problems, Java technology system, need to understand:Performance Index SystemJVM TuningWeb TuningDB tuningVI: Bottom-level knowledgeFrom the architecture design, to the application layer tuning, and then in-depth understanding of the underlying principles, sol

and clear and recyclable for objects that have died in the heap or that have not been used for a long time, and the programmer cannot call the garbage collector in real time for garbage collection of an object or all objects. The recycling mechanism has generational replication garbage collection and token garbage collection, incremental garbage collection.38. What is the basic principle of the garbage collector? Can the garbage collector reclaim mem

classification of unit tests that I understand2. Benefits of implementing Unit tests3. Java Programmer Unit Testing Tool LibraryDefinition and classification of unit testsThe definition of unit tests refers to the code that programmers write to test the logic code. In my understanding, unit tests are divided into the following two categories:Code testingCode testing refers to the implementation of the code

Program | Programmer Java Programmer must read: basic articles Time: 2001/09/13 13:31 Author: ZSC Pacific Network College 　 2.6 What is an interface An interface is a contract that collects methods and constant forms. When a class executes an interface, it promises to declare that all methods are executed in that interface. An interface is a device or a s