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- What is the difference between java and c++
- Difference: Java cannot use a non-Boolean value as a Boolean value in a logical expression, but C++ can. C++ introduces an operator overloading mechanism, which Java does not support. C++ has goto, Java does not have goto. There is multiple inheritance in C++ and only single inheritance in Java, but Java can implement multiple inheritance through interfaces.
- JavaBase 46592 2022-01-12 15:10:35
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- What are the five commonly used design patterns in Java?
- Five commonly used design patterns in Java: 1. Singleton design pattern; 2. Factory design pattern; 3. Agent design pattern; 4. Observer design pattern; 5. Adapter pattern.
- JavaBase 16273 2023-01-13 00:39:54
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- What are the commonly used Java code snippets?
- Commonly used Java code segments include: 1. Convert strings to integers; 2. Add content to the end of the file; 3. Get the name of the current method; 4. Convert strings to dates; 5. Use JDBC to connect to Oracle.
- JavaBase 16406 2023-01-13 00:39:54
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- Sorting of Java Basics TreeSet and Java Custom Types
- The bottom layer of the TreeMap collection is actually a TreeMap. The bottom layer of the TreeMap collection is a binary tree. The elements placed in the TreeSet collection are equivalent to being placed in the key part of the TreeMap collection. The java basic tutorial column will introduce it in detail. Friends in need can take a look.
- JavaBase 3293 2021-03-05 09:54:00
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- Java zero-based detailed explanation of multi-threading
- Daemon threads can be divided into thread classification: user threads (the above are all user threads), and the other is daemon threads. The daemon thread is like this. When all user threads end their life cycle, the daemon thread will end its life cycle. As long as there is one user thread, the daemon thread will not end. For example, the famous garbage collector in Java is a daemon thread. It will not end until all threads in the application end.
- JavaBase 1850 2021-03-04 10:20:39
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- Java explains ThreadPool thread pool
- Similar to the database thread pool, if there is no database connection pool, then new is required every time the database connection pool is used to obtain the connection pool. Repeated connection and release operations will consume a lot of system resources. We can use the database connection pool and directly get the connection pool from the pool.
- JavaBase 2052 2021-03-03 10:36:31
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- Java implementation of singly linked list (Linked List) related
- A singly linked list is an ordered list that stores information in the form of nodes, but the nodes are not necessarily consecutive. Each node includes a data field and a next field. The basic Java tutorial column will be introduced in detail in this article, friends in need can take a look.
- JavaBase 3617 2021-03-01 09:48:42
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- How to define an array in java
- How to define an array in java: 1. Use [String[] s=new String[]] to define a string array; 2. Use [int[] i=new int[]] to define an integer array; 3. Use [String[ ] str2={"a","b","c"}] to define the array.
- JavaBase 49970 2023-01-13 00:39:50
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- Java introduces obtaining class information through reflection
- In the previous section, we introduced the details of the reflection mechanism. In this section, we will introduce the acquisition of class attributes, methods and other information through reflection. Friends in need can take a look together.
- JavaBase 2499 2021-02-26 10:36:49
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- Introduction to Java Concurrent Programming and Thread Safety Basics
- In future development, our projects will all run on the server, and the server has already implemented the definition of threads, the creation of thread objects, and the startup of threads. We don't need to write any of this code. The most important thing is: you need to know that the program you write needs to be run in a multi-threaded environment, and what you need to pay more attention to is the data.
- JavaBase 2757 2021-02-24 10:10:39
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- What are the indexof methods in java?
- The indexof methods in java are: 1. [indexOf(String str)] returns the specified character str in the string; 2. [indexOf(String str, int index)] returns the specified character str starting from the index position to find the specified character str in the string. Index once.
- JavaBase 21701 2023-01-13 00:39:50
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- Discuss in detail the time for Java to set session timeout (expiration)
- After logging in to a general system, a current session expiration time will be set to ensure that the user automatically logs out if they do not interact with the server for a long time. There are three specific methods for destroying the session. This column will introduce it in detail.
- JavaBase 4577 2021-02-19 17:37:28
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- How to solve the problem that the project bar on the left side of eclipse is missing
- Solution: First open the eclipse software, click the "window" option in the top navigation bar; then click the "show view" option in the open drop-down menu; then click the "project Exlorer" option in the open menu to adjust Exit the project bar on the left.
- JavaBase 128325 2023-01-13 00:39:49
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- How to connect sqlserver database in java
- How to connect sqlserver database with java: first prepare the JDBC driver and set up the database; then configure the network and restart the SQL server after applying the settings; finally check whether port 1433 is open.
- JavaBase 27498 2023-01-13 00:39:49
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- Introducing Lambda expressions, the syntactic sugar of Java 8
- Using lambda expressions can reduce the amount of code in our program to a certain extent and optimize the quality of the code. Lambda expression is a new feature of Java8 and one of the most worth learning new features in Java8.
- JavaBase 3054 2021-02-18 18:09:05
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