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What are different garbage collection algorithms in Java (Serial, Parallel, CMS, G1, ZGC)?

The article discusses various Java garbage collection algorithms (Serial, Parallel, CMS, G1, ZGC), their performance impacts, and suitability for applications with large heaps.

Mar 14, 2025 pm 05:06 PM

What is the Java Virtual Machine (JVM) and how does it work internally?

The article discusses the Java Virtual Machine (JVM), detailing its role in running Java programs across different platforms. It explains the JVM's internal processes, key components, memory management, garbage collection, and performance optimizatio

Mar 14, 2025 pm 05:05 PM

How do I use Java's Nashorn engine for scripting with JavaScript?

Java's Nashorn engine enables JavaScript scripting within Java apps. Key steps include setting up Nashorn, managing scripts, and optimizing performance. Main issues involve security, memory management, and future compatibility due to Nashorn's deprec

Mar 14, 2025 pm 05:00 PM

How do I use Java's try-with-resources statement for automatic resource management?

Java's try-with-resources simplifies resource management by automatically closing resources like file streams or database connections, improving code readability and maintainability.

Mar 14, 2025 pm 04:59 PM

How do I use Java's enums to represent fixed sets of values?

Java enums represent fixed sets of values, offering type safety, readability, and additional functionality through custom methods and constructors. They enhance code organization and can be used in switch statements for efficient value handling.

Mar 14, 2025 pm 04:57 PM

What is the average salary for Java development?

1. Fresh graduate Java engineers: 5K for ordinary level, 10K for those with strong ability. 2. Java engineer with one year of work experience: 8K for ordinary level, 15K for strong ability. 3. Java engineer with three years of work experience: 10-15K for ordinary level, 18-20K for those with strong ability. 4. Java engineers with five years of work experience or above: 18K-30K for ordinary level, 25K-40K for those with strong ability.

Mar 11, 2024 pm 02:25 PM

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What does java routing mean?

1. In Java development, routing refers to the process of distributing requests to the corresponding processor for processing based on the requested URL address. 2. In Web development, routing refers to distributing requests to the corresponding processor based on the URL address requested by the user. 3. By defining routing rules, different URL addresses can correspond to different processing logic, and flexible page jumps and data processing can be achieved.

Mar 11, 2024 pm 02:12 PM

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what is javase

Java SE, "Java Platform, Standard Edition", is part of the Java platform. It is a basic Java programming environment that provides a standard development and running environment for Java applications. It is the core of the Java platform and includes the Java programming language, Java Basic components such as virtual machines and Java class libraries are designed to provide Java developers with a common, standard development and running environment so that they can more easily write high-quality Java applications.

Jan 11, 2024 am 09:54 AM

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What are cookies in java

In Java, a cookie is a mechanism used to pass information between a web browser and a server. It is a small piece of text information that is sent by the server to the client's browser and stored on the client's computer. The browser will automatically include the cookie information in the HTTP header and send it back to the server in future requests. Cookies are usually used to identify the user, track the user's status, and store the user's personalized preferences.

Jan 02, 2024 pm 01:59 PM

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Summary of java basic knowledge

Java is a widely used programming language with features such as cross-platform, security, portability, and multi-threading. Therefore, it is widely used in various software development fields. When learning Java programming, there are some key concepts and codes that Java beginners must master.

Oct 24, 2023 am 10:21 AM

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I secretly looked at some computer basics, and from now on learning Java is like cheating!

Machine language is a language that a computer can directly recognize. It is a computer language directly expressed in binary code instructions. It is a code composed of a string of 0s and 1s, with a certain number of digits, and is divided into several segments. The coding of each segment represents a different meaning.

Jul 26, 2023 pm 05:30 PM

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My girlfriend cried and said she couldn't learn Java. That night I taught her the basics...

Java provides an integrated development toolkit JDK, which allows us to compile the Java code we write into a bytecode file (class file). The Java Virtual Machine (JVM) is responsible for converting the bytecode into machine code, so that it can be used in various operating systems. Executed on the computer, the operating system controls the hardware to respond after receiving the instructions.

Jul 26, 2023 pm 05:28 PM

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What to do if java fileinputstream has Chinese garbled characters

Solution to java fileinputstream Chinese garbled code: 1. Open the corresponding Java file; 2. Use "InputStreamReader" to convert "FileInputStream" to "FileReader" and specify the encoding format as "GBK".

Feb 03, 2023 pm 04:15 PM

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What are the six principles of design patterns?

The six principles of design patterns: 1. The single responsibility principle, the core of which is to control the granularity of classes, decouple objects, and improve their cohesion; 2. The opening and closing principle, which can be achieved through "abstract constraints and encapsulation changes" ; 3. The Liskov substitution principle mainly expounds some principles about inheritance; 4. The dependency inversion principle reduces the coupling between clients and implementation modules; 5. The interface isolation principle is to constrain interfaces and reduce class-to-interface dependency Dependencies; 6. Demeter's Law, which requires limiting the width and depth of communication between software entities.

Jan 06, 2023 pm 04:25 PM

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