Java

First week meeting Today our group conducted the first team meeting. Our team divided the law of construction into six parts and six members to learn from the first and upload to the team leader to learn the harvest, the event is the first

1. Summary of this week's study Because the finally clause is always executed, it is possible to return from multiple points in a single method, and to ensure that important cleanup work is still performed. When the constructor is

1. Study summary 1.1 This week summarize anomalies in the way you like (mind mapping or other).2. Written workThis PTA work problem set异常1. Common exceptions7-1 answer with topic set1.1 What exceptions do you often have in code that you have written

String LookupThe string provides two ways to find a string, namely the IndexOf and LastIndexOf methods.1, indexOf (String s)The method is used to return the index position of the first occurrence of the argument string s in the specified string, and

Based on Nginx and Fastdfs, complete the uploading and display of product images.One, traditional image storage and display way A problem exists: 1) When uploading a large amount of concurrent images, you need to load balance

Fundamentals of event handling : The event source (the object that registers the listener and sends the event object to the listener), the event listener (which receives the event source and responds), the event object (encapsulating event-related

1. PrefaceThe last time we met the design of the Java responsibility Chain model, we will show you the practical application of the responsibility chain Model project. How to quickly build a chain of responsibility for the project to use.2. Simple

Java Learning Week 13ththis week, the first six chapters of the knowledge point of the small test, in the test I also found a lot of their own learning on the hidden dangers, some knowledge points to understand too rough, not very good to remember

Java development has quietly walked into our lives, whether it is mobile phone software, mobile phone Java games or computer software, as long as you use the electronic products will encounter and Java-related things, more enterprises are using the

Various cryptographic algorithms for JavaJava provides us with a wealth of encryption technology, can be basically divided into one-way encryption and asymmetric encryption1. One-way encryption algorithmOne-way encryption algorithm is mainly used to

This is my own earlier listening to the lesson of the Java Basic set of knowledge, for beginners, but also suitable for intermediate programmers, I made the type of CHM documents, you can download notes is a more comprehensive system, can be worth 90

Let's go over the polymorphism, and simply say that a reference to a class can point to itself and to the object of its subclass.Like these:Fatherclass a = new Fatherclass ();Fatherclass a = new Son1class ();Fatherclass a = new Son2class ();Again,

First, prefaceSecond, the question 485 Max consecutive Ones Given a binary array, find the maximum number of consecutive 1s in this array. Example 1: Input: [1,1,0,1,1,1] output:3 explanation:the First and digits or the last three

Basic knowledge of Java basic knowledge Server: Tomcat support servlet JSP JBoss Open source application Server Apache: Most extensive HTTP server, only static Web page supported String is the length immutable, a new string object is generated

1. Why use Factory mode?For example, if a drop driver is going to drive money, he will have to make a car, and then he can use the car to earnMoney; For the driver, the demand is very high, after all, the car is difficult to produce;If the factory

FileWriter can only accept arguments in the form of strings, which means that the content can only be stored in a text file. Relative to the text of this articleSave more space in binary format file storageThe InputStream is used to read data from

Java http request methods: HttpURLConnection and HttpClient, 1. You need to understand some conceptual things, such as the Http protocol and some top-level topics. 2. General steps of HttpURLConnection: create URL object = get HttpURLConnection

Servlet's personal understanding, Servlet's personal understanding 1. What is Servlet? 1. servlet is a dynamic web page technology based on Java technology. It runs on the server side and is managed by Servlet containers to generate dynamic content.

Deep understanding of JVM (1)-Java memory region, jvm-java 1. Data Area During Running During Java program execution, the Java Virtual Machine divides the memory it manages into several different data regions. The memory managed by the Java Virtual

Send Spring mail and send spring mailPreface:In the past, emails were directly sent using Java's built-in email tools. Now Spring has helped us encapsulate them, javaMailSender, a simpler email sending tool, is provided. We will not talk about