Two implementation methods of dynamic agent (dynamic agent based on interface and dynamic da based on subclass)

Two implementation methods of dynamic agent (dynamic agent based on interface and dynamic agent based on subclass) I. characteristics of dynamic agent: Bytecode is created on demand and loaded on demand. This is also the difference between it and static agents. Because the static agent is created and loaded as soon as the b ...

Posted on Sun, 17 Nov 2019 15:15:54 -0500 by PureDrive

Why JDBC driver class loading destroys parent delegation mechanism

As you all know, the class loading mechanism of jdk is the parent delegation mechanism. When we need to load a class, for example, the following situations new an object of a class Calling static members (except for final constants) and static methods of a class Using the method of java.lang.reflect package to make reflection calls on classes ...

Posted on Sun, 17 Nov 2019 12:57:45 -0500 by markmh84

Selection structure (no.2)

Selection structure (no.2) switch Statements Format: switch (variable / expression){ case literal 1: statement block 1; break; case literal 2: statement block 2; break; ... case literal value n: statement block n; break; default: statement block n+1; } matters needing attention: Value of expression: byte, int, short, cha ...

Posted on Fri, 15 Nov 2019 14:48:20 -0500 by davieboy

Hystrix Thread Pool Configuration

This paper introduces the working principle and parameter configuration of Hystrix thread pool, points out the existing problems and provides a solution to avoid them. It is necessary to have a good understanding of Hystrix in reading this article. Text discussion based on hystrix 1.5.18: <dependency> <groupId>com.netfl ...

Posted on Thu, 14 Nov 2019 21:49:37 -0500 by nivosh

org.springframework.beans.factory.UnsatisfiedDependencyException

The following error occurred when Tomcat started the SSM project: Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.web.servlet.handler.MappedInterceptor#2': Unsatisfied dependency expressed through constructor argument with index 2 of type [org. Sprin ...

Posted on Thu, 14 Nov 2019 11:46:40 -0500 by crowezr

What's new in JDK

New features of JDK (1) jdk5 (Master) Packing and unpacking Generic Enhanced for Static import Variable parameters Enumeration            public enum Direction {               //FRONT, BEHIND, LEFT, RIGHT;              // Front, behind, left, right;      FRONT("Front") {         @Override         public void show( ...

Posted on Wed, 13 Nov 2019 14:58:45 -0500 by jinwu

tomcat deployment installation

tomcat Tomcat learning environment construction: Deploying the JDK java development kit java development environment Deploying Tomcat LNMP deployment WordPress lnmt jpress (java wordpress) Tomcat runs java programs LNMP Linux Nginx MySQL PHP running PHP program code Nginx static Nginx dynamic fastcgi_pass (PHP) LNMT Linu ...

Posted on Wed, 13 Nov 2019 14:16:15 -0500 by capbiker

Memory crash? In fact, you just need to change the way

Using the Set set Set provided by JDK for URL de duplication seems to work well, but there is a fatal flaw in this approach. As the number of URLs collected increases, you need more and more memory, which will eventually cause your memory to crash. Do we have a solution without using the database? Bloon filter! It can solve this problem perfec ...

Posted on Wed, 13 Nov 2019 06:13:29 -0500 by ScOrPi

Java Description Design Mode (18): Enjoyment Mode

Source code for this article: GitHub. Click here || GitEE. Click here 1. Scenarios for use Apply Code public class C01_InScene { public static void main(String[] args) { String c0 = "cicada" ; String c1 = "cicada" ; System.out.println(c0 == c1); // true } } The String type uses the hedonic mode.String objects ar ...

Posted on Tue, 12 Nov 2019 20:17:50 -0500 by colandy

Image and text analysis of stack

Introduction to stackstack, a linear storage structure, has the following characteristics:(01) the data in the stack is in and out of the stack according to the LIFO (last in first out) mode.(02) when adding / deleting data to the stack, you can only operate from the top of the stack.The stack usually includes three operations: push, peek, pop. ...

Posted on Mon, 11 Nov 2019 23:32:06 -0500 by richardwarren