java foundation Object class

  catalog 1. getClass method 2. equals method 3. hashCode() method 4. toString method 5. clone method 6. Grammar sugar: automatic packing and unpacking The Object class is the root of all Java class inheritance systems. All Java classes, including arrays, inherit from the Object class. There ...

Posted on Sun, 28 Jun 2020 00:21:02 -0400 by jswinkelman

AJAX_ Introduction & classic cases

AJAX_ Introduction & classic cases Getting started with AJAX AJAX introduction AJAX(Asynchronous JavaScript And XML): asynchronous JavaScript and XML. It is not a new technology in itself, but a combination of multiple technologies. Technology for quickly creating dynamic web pages. If you ne ...

Posted on Sat, 27 Jun 2020 22:50:27 -0400 by Strikebf

java source learning - Mybatis creates statement and result set generation

Mybatis creates statement and result set generation statementHandler Result set processing Postscript Previous: Mybatis(3) executes sql procedure statementHandler In the Configuration class of Mybatis, there are the following three methods. If we want to generate a statement, we need to use a statement processor publ ...

Posted on Sat, 27 Jun 2020 05:40:32 -0400 by maxpouliot

Experiment 2 goods purchase and sale management system

Write a Inventory.java Complete the following functions: 1. The program first opens and reads Inventory.txt All inventory records recorded in and read Transactions.txt , process the transactions contained in this file, and record the delivery records to Shipping.txt , and record the error message to Err ...

Posted on Sat, 27 Jun 2020 05:27:11 -0400 by utherwun

Python3 selenium 3 learn from the framework to realize the code selenium makes you get twice the result with half the effort

Last post Brief stay Last blog post It has been learned in: using execute to send a request to the remote server will interact with the browser through webdriver, and sending the defined command constant can obtain some relevant information. Where the execute method implementation is already on A blog post There are implementation instructions ...

Posted on Sat, 27 Jun 2020 04:39:34 -0400 by newbienewbie

The solution of lock in Java

1. Optimistic lock and pessimistic lock Optimistic locks and pessimistic locks should be the first two types of locks that every developer contacts. Application scenarios are mainly used to update data, which is also one of the most important scenarios for using locks. The main process of updating d ...

Posted on Sat, 27 Jun 2020 04:21:02 -0400 by phpbaby2009

Understand interpreter patterns of 23 design patterns

Understand interpreter patterns of 23 design patterns What is an interpreter The definition, characteristics and structure of interpreter code implementation Application scenario of interpreter mode Extension of Interpreter pattern What is an interpreter Interpreter mode, also known as interp ...

Posted on Sat, 27 Jun 2020 04:15:20 -0400 by andrewgarn

Project Reactor responsive programming

introduce "In computers, Reactive Programming or Reactive Programming is a programming paradigm for data flow and change propagation. This means that static or dynamic data flow can be easily expressed in programming language, and the relevant calculation model will automatically propagate the ch ...

Posted on Sat, 27 Jun 2020 03:53:49 -0400 by Iokina

Why does intent inherit the parseable or serialized interface when passing data, and does not implement any methods

1) Permanently save the object and save the byte sequence of the object to the local file; 2) Passing objects in the network by serializing them; 3) Passing objects between processes by serialization   There are two options to implement serialization in Android: one is to implement the Serializab ...

Posted on Sat, 27 Jun 2020 03:51:13 -0400 by noon

Redis series - bloon filter

When we use Redis as cache, one of the problems we need to consider is cache penetration. There are many types of cache penetration, and different types have different solutions. As one of the solutions, the bloon filter is used. The bloom filter is mainly used to determine whether an element is contai ...

Posted on Sat, 27 Jun 2020 02:42:46 -0400 by methodlessman