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- What is a servlet
- The full name of Servlet is "Java Servlet", which means small service program or service connector in Chinese. It is a program running on a Web server or application server. It serves as a request from a Web browser or other HTTP client and a database on the HTTP server or The middle layer between applications. Servlet has the characteristics of being independent of platform and protocol. Its main function is to browse and generate data interactively and generate dynamic Web content.
- Javagetting Started 13148 2023-01-28 09:51:11
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- What are the three forms of java comments?
- Three forms of java comments: 1. Single-line comments, marked with double slashes "//", can only comment on one line of content, and are used in places where the comment information content is small. The syntax is "//comment content". 2. Multi-line comments, included between "/*" and "*/", can comment on many lines of content, the syntax is "/*comment content*/". 3. Document comments, included between "/**" and "*/", can also comment on multiple lines of content. They are generally used on classes, methods and variables to describe their functions. The syntax is "/** comment content. */".
- Javagetting Started 17508 2023-02-01 17:34:36
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- What can be the modifiers of java interface
- The modifiers of java interface can be abstract and final. The interface can be understood as a special class. The difference is that the members of the interface have no execution body and are composed of global constants and public abstract methods; the methods of the interface are public abstract by default; and variables cannot be defined in the interface. Constants can be defined (with final modification, they will become constants), so the properties of the interface are public static final constants by default and must be assigned an initial value.
- Javagetting Started 3273 2023-01-04 13:04:09
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- What is the difference between pass by value and pass by reference in java
- Differences: 1. Value transfer creates a copy, while reference transfer does not create a copy; 2. In value transfer, the original object cannot be changed in the function, but in reference transfer, the original object can be changed in the function. Passing by value means that a copy of the actual parameters is passed to the function when calling the function, so that if the parameters are modified in the function, the actual parameters will not be affected; passing by reference means that the actual parameters are copied when calling the function. The address is passed directly to the function, so modifications to the parameters in the function will affect the actual parameters.
- Javagetting Started 6032 2023-02-02 15:27:40
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- Is java development front-end or back-end?
- Java development is a back-end, not a front-end; Java is an object-oriented programming language and one of the most common back-end development languages. The back-end mainly allows servers, applications, and databases to interact with each other. You need to consider how to implement functions. Data access, platform stability and performance, etc. Commonly used scripting languages include php, java, python, etc.
- Javagetting Started 24360 2022-09-14 14:51:37
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- How long does it take to get started with java? How long does it take to study by yourself?
- How long does it take to get started with java? How long does it take to get started with PHP? Which one is better, php or java? Do many friends have such questions? Today, as the title says, we will mainly talk about how long does it take to get started with Java? It takes about half a year or a year for you to get started with Java.
- Javagetting Started 7409 2022-02-14 16:04:47
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- What is the character code set used by the java language?
- The character code set used by the Java language is Unicode. Unicode is a character encoding scheme developed by an international organization that can accommodate all texts and symbols in the world.
- Javagetting Started 10047 2022-01-06 17:34:30
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- Use of white-box testing framework (JUnit)
- Today we will introduce junit5. junit5 consists of three different sub-project modules, including Junit Platform, Junit Jupiter and Junit Vintage.
- Javagetting Started 3769 2021-12-08 19:22:02
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- How to set java variables (declaration)
- In Java, you can set (declare) a variable by specifying the data type and identifier. The syntax is "variable type variable name;" or "variable type variable name = initial value;"; the variable type can be int, string, char, and double. wait.
- Javagetting Started 8047 2023-01-13 00:40:10
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- What are java static methods
- In Java, static methods refer to member methods modified by static. A static method can be called without any instance of the class to which it belongs. Therefore, the this keyword cannot be used in a static method, and the instance variables and instance methods of the class to which it belongs cannot be directly accessed. However, the static variables of the class to which it belongs can be directly accessed. and static methods.
- Javagetting Started 28029 2023-01-13 00:40:10
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- What is the difference between javase and javaee
- Difference: JavaSE refers to the Java Platform Standard Edition, which is used to develop and deploy Java applications on desktops, servers, and embedded devices and real-time environments. JavaEE refers to Java Platform Enterprise Edition, used for developing and deploying portable, robust, scalable and secure server-side Java applications.
- Javagetting Started 100432 2023-01-13 00:40:10
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- How to get the string length in java
- In Java, you can use the length() method of the String class to get the length of the string. The syntax format is "string name.length();"; this method can return the length of the string, and the length of the empty string returns 0.
- Javagetting Started 33552 2023-01-13 00:40:10
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- What are the shortcut keys for idea?
- The idea shortcut keys are: Ctrl+F, Ctrl+R, Ctrl+Z, Ctrl+Y, Ctrl+X, Ctrl+C, Ctrl+D, Alt+`, Alt+Q, Alt+F1, Alt+F2, Alt+ F3, Alt+F7, Shift+F1, Shift+F2, etc.
- Javagetting Started 178824 2023-01-13 00:40:10
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- Is javaweb front-end or back-end?
- Javaweb is a direction in Java development. Java has Android direction, web direction, embedded direction, etc. Javaweb refers to the web direction. Javaweb is divided into two parts, one is the server side called the back end, and the other is called the front end, which is the web front end.
- Javagetting Started 19125 2021-06-18 14:26:33
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- Why are the features of springboot adapted to the microservice technology ecosystem?
- For the sake of independence, springboot directly integrates web services into the framework. After the project is created, it can be started directly as a microservice. This method saves the deployment process. The development and deployment of the past model is not only troublesome...
- Javagetting Started 2259 2021-06-01 16:19:30
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