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  • Java multi-thread synchronization lock mechanism and synchronized in-depth analysis

    Java multi-thread synchronization lock mechanism and synchronized in-depth analysis

    To use an analogy: an object is like a big house, the door is always open. There are many rooms (aka methods) in a house. These rooms are either locked (synchronized method) or unlocked (normal method). There is a key at the door of the room. This key can
    2024-11-20
  • Detailed explanation of java jdk dynamic proxy

    Detailed explanation of java jdk dynamic proxy

    To proxy a class with jdk dynamic proxy, the proxied class must implement at least one interface, and only methods in the interface can be proxied. The implementation of dynamic proxy in jdk is generally divided into three steps: 1. Write interface and im
    2024-11-20
  • Introduction to escape characters in java

    Introduction to escape characters in java

    There are four types of escape characters in java: Escape characters in JAVA: 1. Octal escape sequence: + 1 to 3 digits of 5; range '00'~'377': null character 2. Unicode escape character: u + Four hexadecimal digits; 0~65535u0000: null cha
    2024-11-20
  • Summary of common methods of STRING in JAVA

    Summary of common methods of STRING in JAVA

    1. Create and initialize a string String b = "hello"; use the constructor method to create and initialize a string String();//Initialize the string, representing the empty character sequence String(value);//Use existing characters String constan
    2024-11-20
  • Java implements several common sorting algorithm codes

    Java implements several common sorting algorithm codes

    Stability (stability) A sorting algorithm is stable, that is, when there are two equal records of the keywords R and S, and R appears before S in the original list, R will also be in the sorted list. before S. Common classifications of sorting algorithms
    2024-11-20
  • In-depth analysis of the execution sequence of try catch finally

    In-depth analysis of the execution sequence of try catch finally

    First execute try, if there is an exception, execute catch, and finally will be executed anyway. A function will definitely execute the part in finally. Regarding the execution process of a function, when there is a return, the function will store the dat
    2024-11-20
  • A small example of java connecting to Redis

    A small example of java connecting to Redis

    The corresponding API (jedis-2.1.0.jar) is required to copy the code. The code is as follows: package com.redis; import redis.clients.jedis.Jedis; public class Client {public void ge
    2024-11-20
  • java DOM4J reading XML example code

    java DOM4J reading XML example code

    The following is an XML reading test copy code I wrote myself. The code is as follows: import java.util.Iterator; import java.io.BufferedReader; import java.io.File; import java.io.
    2024-11-20
  • Java FileFilter file filtering and readline reading operation example code

    Java FileFilter file filtering and readline reading operation example code

    Copy the code as follows: package com.cjonline.foundation.evisa;import java.io.BufferedReader;import java.io.File;import java.io.FileFilt
    2024-11-20
  • Implementation code for restoring mysql database through java backup

    Implementation code for restoring mysql database through java backup

    Copy the code as follows: import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStrea
    2024-11-20
  • Java thread priority sample code

    Java thread priority sample code

    Students who have used Bit download software should be very clear that we have multiple download tasks executing at the same time, and one or more of them are very important, so we set a high priority for these tasks so that the tasks can obtain more Band
    2024-11-20
  • Detailed analysis of the usage of Object.wait() and Object.notify()

    Detailed analysis of the usage of Object.wait() and Object.notify()

    The wait, notify and notifyAll methods are the final native methods of the Object class. Therefore, these methods cannot be overridden by subclasses. The Object class is the superclass of all classes, so there are the following three forms of calling wait
    2024-11-20
  • In-depth analysis of the role of volatile keyword in Java

    In-depth analysis of the role of volatile keyword in Java

    In Java thread concurrent processing, there is currently a lot of confusion about the use of the keyword volatile. It is thought that using this keyword, everything will be fine when performing multi-threaded concurrent processing. The Java language suppo
    2024-11-20
  • Detailed explanation of using Enumeration and Iterator to traverse collection classes

    Detailed explanation of using Enumeration and Iterator to traverse collection classes

    Preface In the code example of database connection pool analysis, we saw that Enumeration is used to traverse the Vector collection. Later, I looked for some information to see what methods can be used to traverse collection classes. I found the following
    2024-11-20
  • How to generate random numbers within a specified range using java

    How to generate random numbers within a specified range using java

    To generate a random integer between [min,max], package edu.sjtu.erplab.io;import java.util.Random;public class RandomTest { public static void ma
    2024-11-20
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