Experiment 3: derived class and inheritance experiment
1. Experimental purpose
(1) Master the declaration method of derived class and the definition method of derived class constructor;
(2) Master the access properties of base class members in derived classes under different inheritance methods;
(3) Master the execution order and con ...
Posted by jplock on Tue, 08 Feb 2022 09:30:28 +0100
How much do you know about MyBatis? Do you know the SqlSessionFactory construction process? Understand the XML parsing process? Do you know what Mapper agent does? This chapter takes you to read the source code with MyBatis 3.5.3, so that you can understand the essence of MyBatis instead of being limited to using it.
Recently, I was working on a simple posting applet, which involves the like function. At first, I thought it was very simple. Later, I found that the difficulty lies in how to record the user's like status of the article, so as to avoid the failure of the like status when I open it next time. Let's start with the renderings: After Baidu for h ...
Posted by Stickybomb on Thu, 03 Feb 2022 00:32:19 +0100
xdm well, I'm a jump table, an ordered data structure. There is an array in each of my nodes. I maintain multiple pointers that can point to other nodes, so I can quickly access these nodes. That's why I'm a jump table.
My average time complexity is O(logN). At worst, it is O(N). In most cases, I can compare with the efficie ...
Posted by kb0000 on Wed, 02 Feb 2022 18:52:10 +0100
This article is translated from Python & APIs: A Winning Combo for Reading Public Data
Article code address https://github.com/realpython/materials/tree/master/consuming-apis-python?__s=kea6w26ii09uqhijmy0b
Python+API: a perfect match for reading public data
go to top Learning to use different APIs is a magical skill, and many applica ...
Posted by p.persia69 on Wed, 02 Feb 2022 12:13:37 +0100
BC47 judge whether it is a letter
KiKi wants to judge whether the input character is a letter, please help him program it.
Multiple sets of input, one character per line.
For each group of input, the output occupies a separate line to judge whether the input character is a letter. See th ...
Posted by makeshift on Wed, 02 Feb 2022 10:37:14 +0100
https://imshuai.com/using-javac Tools such as IDE or maven have been responsible for compiling Java programs. However, the more advanced the tool is, the more details will be hidden. Once there is a problem, it will be confused. In the final analysis, the basic concept is not reliable. Returning to the original place, javac, will make the probl ...
Posted by Fog Juice on Wed, 02 Feb 2022 07:45:20 +0100
1, Process control
1.1 user interaction Scanner
java. util. New features of scanner jdk5
Used to get user input
// Create a scanner object to receive keyboard data
Scanner sr = new Scanner(System.in);
// Use next to get the string. The string cannot be ended without spaces.
String name = sr.next();
// Receive the string, ending with enter, ...
Posted by Michael_C on Tue, 01 Feb 2022 17:08:13 +0100
For those who have no backlight on their keyboard, there is no prompt when switching case or controlling the Num key switch. It is often a bad experience to enter some characters tentatively to determine whether the switch is on or off.
As a result, one might think of homemade scripting as a way to notify windows whenever a case or Num swi ...
Posted by altergothen on Tue, 01 Feb 2022 14:35:01 +0100
Neusoft campus navigation assistant
1. Design the campus plan. Among them, there are at least 12 representative places. The vertex in the plan represents the representative place in the school, and the weight on the edge represents the distance between the two points;
2. In order to realize the management of the sub func ...
Posted by derezzz on Tue, 01 Feb 2022 13:34:07 +0100