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- What does = mean in java?
- "=" means assignment, which is an assignment operator that can assign a value to a variable, such as int a = 10; assign the literal 10 to the integer variable a.
- Javagetting Started 4724 2019-12-27 13:54:24
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- What is the difference between vector and list in java?
- The difference: list is one-way, vector is two-way. The iterator in the vector becomes invalid after use, while the iterator in the list can continue to be used after use.
- Javagetting Started 6386 2019-12-27 13:37:28
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- Detailed analysis of heap memory and stack memory in Java
- This article is recommended by the java zero-based introduction column. It analyzes stack memory and heap memory in detail, and introduces the difference between the two. I hope it can help you. Heap memory is used to store objects and arrays in Java, and stack memory is mainly used to execute programs.
- Javagetting Started 2628 2019-12-26 17:40:25
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- What are java constants?
- Java constants are fixed values in the program, which are data that cannot be changed, such as the number 1, the character "a", floating point number [3.2], etc. In Java, constants include integer constants, floating point constants, and Boolean constants. , character constants, etc.
- Javagetting Started 31623 2020-09-05 15:32:00
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- What is the difference between set and list in java?
- The differences between list and set are: list can allow duplicate objects and insert multiple null values, but set does not; list containers are ordered, while set containers are unordered, etc.
- Javagetting Started 2516 2019-12-26 17:19:18
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- In-depth understanding of automatic boxing and unboxing in java
- This article is recommended by the java language introduction column. The article provides an in-depth explanation of the knowledge about automatic boxing and unboxing in java through detailed examples. I hope it can help everyone. Boxing converts basic data types into wrapper classes, and unboxing converts wrapper classes into basic data types.
- Javagetting Started 3076 2019-12-19 11:55:29
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- The difference and connection between android and java
- The difference between Android and Java is: Android is the operating system of mainstream smartphones, while Java is a development language. From the perspective of job positions, Android is engaged in the direction of mobile Internet, while Java is engaged in development. The connection between the two is: applications on the Android application layer are written in Java, using Java as the development language.
- Javagetting Started 5255 2019-12-18 15:29:00
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- What is the basic class library in java?
- The basic class library in Java refers to a class library provided by Java. When we develop, we can select the classes we need from the basic class library, and then call methods in the classes to implement some functions. For example: [scanner] class, which can read user keyboard input and file input.
- Javagetting Started 3560 2019-12-18 14:58:42
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- what is javaweb development
- [javaweb] is the sum of technologies that use Java technology to solve related web and Internet fields. Learning JavaWeb development is to learn to use java and other related technologies to develop web applications with different functions on the browser, and all the functions are summarized in one sentence It's all about processing data.
- Javagetting Started 3819 2019-12-18 13:31:29
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- How to import java files into editor
- The method to import java files into the editor is: 1. First open the project list, right-click and select [Import]; 2. Find [general] and select [Import Project]; 3. Then click [Browse] and select the project that needs to be imported. file; 4. Finally, click [Finish].
- Javagetting Started 4445 2019-12-18 13:19:30
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- How to pass parameters in java parameters
- There are two ways to pass parameters in Java: pass by value, which copies a parameter value into a formal parameter of the subroutine. Call by reference, in which a reference to the parameter (rather than the parameter value) is passed to the subroutine parameter, and in the subroutine, the reference is used to access the actual parameter specified in the call.
- Javagetting Started 5650 2019-12-09 17:01:51
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- What's in the java package
- To better organize classes, Java provides a package mechanism. Packages are containers of classes that separate class namespaces. Five commonly used packages in Java: java.lang.*, java.util.*, java.io.*, java.net.*, java.sql.*.
- Javagetting Started 3312 2019-12-09 16:47:09
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- Can private variables in java be inherited?
- Private variables in Java can be inherited. A private variable with private permissions in the Java parent class. After the subclass object inherits it, the variable actually exists in its memory. However, the variable cannot be directly referenced. Instead, it needs to call the set or get method of the parent class's public or protected method. Use this variable.
- Javagetting Started 3115 2019-12-09 16:42:36
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- What certifications does Java have?
- Sun Java certification is divided into two levels: Sun Certified Java Programmer and Sun Certified Java Developer. The former exam covers all Java-related knowledge, programming concepts and applet development skills. The latter exam is designed to test your ability to perform complex programming through application software assignments.
- Javagetting Started 3802 2019-12-09 16:39:33
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- what is java thread synchronization
- Thread synchronization in Java: When calling the same object between multiple threads, for the safety and accuracy of operation, the object needs to be synchronized to ensure that the result of the object is correct when used by each thread.
- Javagetting Started 3641 2019-12-09 16:29:46
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