[Learning Notes - Java Collection - 10] Set - LinkedHashSet Source Analysis

introduce In the previous section, we said that elements in HashSet are disordered, so is there any way to ensure that elements in Set are ordered? The answer is, of course. LinkedHashSet has this function. How does it achieve orderliness? Source code analysis LinkedHashSet inherits from HashSet, so let's go directly to the source code to see h ...

Posted on Sat, 17 Aug 2019 04:06:15 -0700 by alexvgtb

[Learning Notes - Java Collection - 9] Set - HashSet Source Analysis

brief introduction Set, the concept is a little vague. Generally speaking, collections in Java refer to container classes under the java.util package, including all classes related to Collection and Map. Generally speaking, collections refer to Collection-related classes in java collections, not Map-related classes. In a narrow sense, a Set in ...

Posted on Sat, 17 Aug 2019 03:52:47 -0700 by mannyee

[Fast SpringBoot] Filter XSS script attacks (including json format)

What is an XSS attack? XSS attack, which is called cross-site scripting attack, is to avoid confusion with the abbreviation of Cascading Style Sheets (CSS). Therefore, cross-site scripting attack is abbreviated as XSS. XSS is a computer security v ...

Posted on Sat, 17 Aug 2019 02:28:59 -0700 by Daggeth

Sparse Array of Data Structure Algorithms

Data Structure and Algorithms I. Linear and Nonlinear Structures Data structure includes linear structure and non-linear structure. 1. Linear structure (1) As the most commonly used data structure, linear structure is characterized by one-to-one ...

Posted on Sat, 17 Aug 2019 02:10:53 -0700 by ericorx

Buffer Stream 04_Buffer Stream Efficiency Test_Copy Files

package com.itheima.demo02.CopyFile; import java.io.*; /* Document Copy Exercise: Read and Write To make clear: Data source: c:\1.jpg Destination of data: d:\1.jpg Steps for file replication: 1. Create byte buffer input stream object and pass byte input stream in construction method 2. Create byte buffer output stream object a ...

Posted on Sat, 17 Aug 2019 01:10:25 -0700 by Mow

Step into the JavaWeb technology world 14: Step-by-step understanding of Mybatis through the project

WeChat Public Number (Huang Xiaodian) is a programmer in a large factory, a new knowledge in the Internet industry, and a lifelong practitioner of learning.Reply to "Java", "Python", "C++", "Big Data", "Machine Learning", "Algorithms", "AI", "Android&qu ...

Posted on Fri, 16 Aug 2019 19:34:35 -0700 by @sh

Spring Cloud Gateway's built-in routing predicate factory

[TOC] Built-in routing predicate factory Spring Cloud Gateway has built-in a series of routing predicate factories so that we can flexibly use Gateway for request forwarding in development. Here I tabulate all the routing predicate factories built into Gateway as follows: Routing predicate factory Effect parameter After The request is fo ...

Posted on Fri, 16 Aug 2019 07:13:51 -0700 by gbuck

Date and Collection Framework

1. Date operation in java 1970-1-1 0:0:0 Msec java.util.Date encapsulates a long-type millisecond // Current system time Date date = new Date(); System.out.println(date); //Gets the number ...

Posted on Fri, 16 Aug 2019 05:52:13 -0700 by andrewcb

Data x Data Synchronization: A Simple Practice of Mysql 2 Mysql (Local windows) (Containing Several Solutions to Compile Errors)

This paper uses datax in windows environment and refers to it in Linux environment. Development tools and environmental parameters: Windows environment: IDEA, JDK 1.8, Maven 3.6.0, Python 2.7.16 Linux environment: MySQL 5.7.25 (deployed on tw ...

Posted on Fri, 16 Aug 2019 02:37:50 -0700 by shivangp

Aviator expression evaluation engine

Application Scenarios Requirements: User portfolio system functions formulate formulas, code calls calculation. Solution: Originally intended to use java to write a compiler, but the work is more difficult. Search the web for other solutions, Aviat ...

Posted on Thu, 15 Aug 2019 20:20:59 -0700 by simoesp