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- Calculate how to calculate date and time difference in Java8
- The java basic tutorial column introduces how to calculate the date and time difference in Java 8. The method is simple and concise. Friends in need can take a look for reference.
- JavaBase 2286 2021-01-19 09:34:25
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- You must know the difference between '==' and equals() in java
- Today we will discuss the difference between "==" and equals() in Java ==: The relational operator compares whether the contents of two values are equal in basic data types, and compares whether the addresses of two objects are equal in reference types. Equality equals() is a method in the Object class
- JavaBase 2870 2021-01-18 17:20:37
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- What are the java middleware technologies?
- Java middleware technologies include: 1. tomcat; 2. Weblogic; 3. JBOSS; 4. Coldfusion; 5. Websphere; 6. GlassFish.
- JavaBase 10303 2021-01-18 15:37:39
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- what are java features
- Java features: 1. Cross-platform; 2. Security; 3. Object-oriented; 4. Simplicity; 5. High performance; 6. Distributed; 7. Multi-threading, which can bring better interactive response and real-time behavior; 8. Robustness.
- JavaBase 33866 2023-01-13 00:39:48
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- What is the role of volatile in java
- The role of volatile in java: 1. Java provides the volatile keyword to ensure visibility; 2. To ensure orderliness, the code is [context = loadContext(); inited = true;]; 3. Provide double check.
- JavaBase 28397 2023-01-13 00:39:48
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- What are the java member variables?
- Java member variables include: 1. Instance variables [String id, private String colorType]; 2. Class variables [private static String depart]; 3. Constants [final String design=yang].
- JavaBase 13958 2023-01-13 00:39:48
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- How to calculate date time difference in Java8
- The java basic tutorial column introduces how to calculate the date and time difference in Java 8. The method is concise. Friends in need can take a look, summarize and learn, or discuss together.
- JavaBase 2582 2021-01-07 18:06:15
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- Let's take a look at what 'weak' references are in Java?
- The java basic tutorial column introduces that when an object obj is created in Java, it is placed in the heap. When the GC runs and finds that there is no reference pointing to obj, the heap memory space of the obj object will be reclaimed. In other words, an object is recycled...
- JavaBase 2653 2021-01-06 18:10:21
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- How to determine whether the key exists in map in java
- The method for map in Java to determine whether a key exists: 1. Judge through [containsKey("key")]; 2. Judge through the [hasNext()] method, the code is [Set set = map.keySet();].
- JavaBase 29817 2023-01-13 00:39:47
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- How to create a java project in eclipse
- How to create a java project in eclipse: first click the file option pointed by the arrow and create a new project; then click the src package under the project, right-click SEC, select new and CLASS pointed by the arrow; finally enter the class name in the input box and check The box pointed by the arrow.
- JavaBase 153812 2023-01-13 00:39:47
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- Learn the use of Java locks with Netty
- The java basic tutorial column introduces the size of the lock object itself to reduce the space occupied. Atomic long V.S long The former is an object, including an object header to save hashcode, lock and other information. It occupies 16 bytes in a 64-bit system....
- JavaBase 2477 2021-01-04 10:04:24
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- Helpful examples of encapsulation and inheritance in Java
- Basic java tutorial introduces the use of encapsulation to implement the penguin class of the electronic pet system. Correctly enter the health value and intimacy to ensure the validity of the health value (0-100), otherwise take the default value of 60 to ensure the validity of the intimacy (0-100), otherwise Take the default value of 60 and the code is as follows...
- JavaBase 2404 2021-01-02 10:51:58
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- Java implementation ensures the consistency of double writing between cache and database
- The java basic tutorial column introduces distributed cache, which is an indispensable component in many distributed applications today. However, using distributed cache may involve dual storage and double writing of cache and database. As long as you double write, you will definitely There is a problem of data consistency, so how do you solve the consistency problem?
- JavaBase 3031 2020-12-30 17:51:02
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- Introducing the three simplest implementation methods of Java scheduled tasks
- The basic Java tutorial introduces that scheduled tasks are particularly common in actual development. For example, the e-commerce platform automatically cancels unpaid orders after 30 minutes, as well as data summary and backup in the early morning, etc., all of which need to be achieved with the help of scheduled tasks, so we will come to this article Let’s take a look at some of the simplest ways to implement scheduled tasks.
- JavaBase 2976 2020-12-29 17:45:48
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- Insight String string
- Introduction to the java basic tutorial column In Java 6 and previous versions, the String object is an object that encapsulates a char array. It mainly has four member variables: char array, offset offset, character count, and hash value hash. ...
- JavaBase 2342 2020-12-28 17:27:03
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