Programmer Think

#0 Preface In the last article, we learned about the basic use of Constraint Layout. If you don't know Constraint Layout, go and learn about it. Guidelines for Constraint Layout Use https://www.jianshu.com/p/958887ed4f5f This number has also pushed some articles: Learn some new features of Constraint Layout again This article fo ...

Object-Oriented Advancement I. isinstance and issubclass built-in methods 1,isinstance(obj,cls) Function: Check whether obj is an object of cls class? 2,issubclass(sub, super) Function: Check whether the sub class is a derivative of the super class? 2. Reflex (introspection) 1. Definition: The concept of reflecti ...

Recently, I have been learning the front-end Vuejs. For novices, I don't understand the difference between computed, methods and watch in Vuejs. In fact, the official documents are clear, but for novices, it is still unclear. Address: https://cn.vuejs.org/v2/api/#computed 1#computed: Computed properties will be mixed i ...

Spring IOC Views Source Code from Example A more complete portal for notes Github Example public class Main { public static void main(String[] args) { ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml"); UserService userService = (UserService) a ...

This is a series of blog posts, I will continue to provide you with as thorough as possible Android source analysis github serial address Preface After the first two stages of init, the attribute system and SELinux system have been established, but the init process needs to perform many other operations and start many key system ...

This is from me Mucho Net Handwriting: Very useful Java 8 snippet , please keep the link for upload;) Array (array related) chunk Divides an array into small arrays of a specific size. public static int[][] chunk(int[] numbers, int size) { return IntStream.iterate(0, i -> i + size) .limit((long) Math.ceil((double) numbers.len ...

As you can see in the last blog CSS3 3D photo album, the key to achieving this 3D effect is: Change the position of each element with transform Use transition to increase dynamic effects Using perspective Attribute to Change perspective The two attributes of transform ation and transition are well understood, but the ...

https://www.cnblogs.com/vmax-tam/p/4145334.html Development steps of custom tags Step one Write a common java class that inherits the TagSupport class~ package com.vmaxtam.dotest; import javax.servlet.jsp.tagext.TagSupport; public class MyTagTest extends TagSupport { } Step two Rewrite the setPageContext method of the parent class to ...

problem (1) Why add LongAdder in Java 8? (2) How to implement LongAdder? (3) Comparison between Long Adder and Atomic Long? brief introduction LongAdder is a new atomic class in Java 8. In multithreaded environments, LongAdder performs much better than AtomicLong, especially in more-written scenarios. How did it come about? Let's study together ...

Some time ago, I was a little confused about parameter passing in Java and didn't understand its meaning. Looked up a lot of information, here I talk about my understanding of the problem. There are two kinds of parameter passing, one is "pass value" and the other is "pass address value". Passing value refers to passing the ...