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- What is the difference between design patterns and frameworks in java
- The difference between design patterns and frameworks in Java is: 1. The framework gives the architecture of the entire application, while the design pattern gives a solution to a single design problem, and this solution can be used in different applications or frameworks Apply; 2. The design pattern is just a pure design, while the framework is a mixture of design and code.
- Javagetting Started 2586 2020-02-05 15:43:42
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- What software is java mainly used to develop?
- Java can do many things, involving all aspects of the programming field, such as: 1. Desktop-level applications, especially desktop-level applications that require cross-platform; 2. Enterprise-level applications; 3. Embedded devices and consumer electronics products , such as wireless handheld devices, smart cards, medical equipment, digital TV, etc.
- Javagetting Started 6389 2020-02-05 13:44:18
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- The java background framework mainly consists of several layers
- The framework of the Java backend is mainly composed of five layers, namely: 1. DAO layer (persistence layer); 2. ENTITY layer (entity layer); 3. SERVICE layer (business layer); 4. CONTROLLER layer (control layer); 5 , View layer (view layer).
- Javagetting Started 4634 2020-02-05 13:33:40
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- java recursive algorithm example
- This article comes from the Java introductory tutorial column. It shows you the implementation process of the recursive algorithm through examples. I hope it can help you. Three elements need to be mastered to implement a recursive algorithm, which are: 1. Clarify the termination conditions; 2. Give the processing method when the recursion terminates; 3. Extract repeated logic.
- Javagetting Started 2630 2020-02-04 17:40:02
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- How to use java operators
- There are many operators in Java, such as the assignment operator: [int a = 30], which means assigning the data on the right to the variable on the left; there are also ternary operators, such as [data type variable name = conditional judgment? Expression A: Expression B].
- Javagetting Started 2845 2020-02-04 16:38:52
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- How to view java api documentation
- The method to view the Java API documentation is: 1. First open the Oracle official website; 2. Then click [download java for developers]; 3. Then click [java apis]; 4. Finally, select the required version and open the corresponding version online. api documentation.
- Javagetting Started 8423 2020-02-04 14:30:46
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- How to play java games on Android?
- To play Java games on Android phones, you need to install the j2me emulator. Find the Java installation package in jar format in the file manager and install it. Make resolution and other related settings in the installed program, and finally click Run to start the game.
- Javagetting Started 11361 2020-02-04 11:40:00
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- How to type the 'or' symbol in java
- How to input the "or" symbol in Java: Press and hold the shift key in the English input method, and then press the right underline (the key between the backspace key and the enter key).
- Javagetting Started 25741 2020-02-04 10:25:45
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- What are the java functions?
- Java has many functions, and functions are methods. There are many packages in the JDK, each package has many classes, and each class has many methods. For example, the String class has functions such as valueOf(), splite(), and toArrayChar().
- Javagetting Started 5296 2020-02-04 10:09:26
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- What is java path?
- The Java path refers to the location of the Java executable file in the system, usually "Java installation path\jdk\bin\java.exe". There are also javaw.exe and javaws.exe files in the bin directory, which are also Java executable files.
- Javagetting Started 2795 2020-02-04 09:51:06
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- Solution to Java program displaying garbled characters in Chinese
- The solution to the problem that Java programs display garbled characters in Chinese: First use Notepad to open the source code file, click [File] - [Save As]; then in the encoding settings, change UTF-8 to ANSI; finally recompile and run.
- Javagetting Started 26978 2020-02-04 09:26:31
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- javac cannot find .java file
- Solution to the problem that javac cannot find the .java file: 1. Open the folder options - check the file extension - rename the Java file and delete the .txt suffix; 2. Use the cd command to switch to the path where the java file is located, and then execute the javac command ;3. Check the correctness of the main() method.
- Javagetting Started 4002 2020-02-04 09:12:50
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- How to generate jar in java
- How to generate jar from java: 1. Write a test class and compile it into a class file; 2. Enter the parent directory of the class file and enter jar -cvf [name of jar package] [file to be packaged] to complete packaging.
- Javagetting Started 4319 2020-02-03 14:52:38
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- Is jdk java?
- jdk is not java, and Java is not jdk. Java is a development language, and JDK is the abbreviation of Java Developer Kit. In other words, only programmers who develop Java need to install JDK. If you want to run Java language, you only need JRE (Java Runtime Environment).
- Javagetting Started 6164 2020-02-03 14:37:44
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- What is java polymorphism mechanism
- The mechanism to achieve polymorphism in Java relies on references from parent classes or interfaces to point to subclasses. Thus realizing the characteristics of multiple forms of an object. The reference of the parent class dynamically points to a specific instance when the program is running. When the method of the reference is called, it is not run according to the method defined in the type of the reference variable, but according to the method of the specific instance.
- Javagetting Started 2618 2020-02-03 14:25:20
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