包含标签：Java 的文章
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A simple method of exporting Excel files from Java Web
When doing system projects at ordinary times, you often need to do the export function, whether exporting Excel or exp…… -
Java EE online number management system
This blog is a summary of filter, listener and servlet technologies. It realizes the functions of simply displaying th…… -
Java POI common method for parsing Excel data conversion (recommended)
As follows: The above public method for data conversion of Java POI parsing excel (recommended) is all the content sha…… -
Mutual conversion between string and byte array in Java
preface When Java communicates with programs written in other languages through TCP / IP socket, the communication con…… -
Implementation of Java rounding and keeping decimal
//Mode 1: double f = 3.1516; BigDecimal b = new BigDecimal(f); double f1 = b.setScale(2,BigDecimal.ROUND_HALF_UP). dou…… -
Implementation method of conversion between Java byte array and int, long, short and byte
Examples are as follows: The above is all about the implementation methods of Java byte array and int, long, short and…… -
Java solution for intercepting strings with Chinese characters by bytes (recommended)
Since the length of the Oracle field used by the interface is a fixed number of bytes, and the string transmitted late…… -
Java removes duplicate elements from the sorted array
@H_ 502_ 1 @ Title Description Given a sorted array, remove the duplicate elements in the array, keep only one duplica…… -
Java self-study books recommend programmers to architects
As a java programmer, the most painful thing is that there are too many choices and too many books to read, which is o…… -
Java uses hashtable to filter duplicate values in an array
This article describes how Java uses hashtable to filter duplicate values in arrays. Share with you for your reference…… -
On substring () method in Java string
The method is as follows: The first int is the starting index, corresponding to the starting position in the string nu…… -
Writing LAN multiplayer chat room based on Java
Because we need to make the course design of network computer network, and don't want to do things that we don't under…… -
Talking about Java generic wildcards solves many criticisms of generics (such as not overloading)
Generic: Generic methods cannot be overloaded because they are the same after being erased, that is, if the formal par…… -
Another wave of essential books for Java professionals
Essential books for Java professionals: Every programmer has books that are often worn out as professional information…… -
Summary of common functions based on math class in Java
Summary of several commonly used mathematical formulas in Java: Random class is specially used to generate a pseudo-ra…… -
Implementation of Java string encryption and password encryption
In our program design, we often need to encrypt some special content. Today, we have summarized several simple encrypt…… -
Conversion method between java basic type and byte array
The conversion between java basic types and byte arrays is just written The above conversion method between java basic…… -
On the type derivation of Java 8’s new feature generics
1. What is generics? Before discussing type inference, we must review what is generic Generics is a new feature of Jav…… -
Fully understand the differences and applications between java basic types and encapsulation types
1. Basic types can only be passed by value, and the encapsulation class corresponding to each basic type is passed by …… -
Stand alone version of bookstore management system of Java design module series (2)
Java stand alone bookstore management system (exercise design module and idea series I): http://www.jb51.net/article/9…… -
How much memory can Java objects occupy?
Recently, I read in-depth understanding of Java virtual machine and had a further understanding of the memory layout o…… -
Summary of java development novice problems
Java is one of the most popular programming languages & mdash& mdash; It can be used to write windows programs…… -
Summary of 20 interview questions for Java advanced developers
This is the first part of an advanced Java interview series. This part discusses the core issues of Java, such as vari…… -
Several configuration methods of Java database connection pool (taking MySQL database as an example)
I Tomcat configuration data source: Premise: you need to put the jar package connecting the MySQL database driver into…… -
Deep understanding of Java interfaces and abstract classes
Abstract is one of the characteristics of object-oriented programming. In Java, OOP abstraction can be embodied in two…… -
25 learning points for becoming a Java master
Want to be a Java bull? Here are 25 points for learners. 1. You need to be proficient in object-oriented analysis …… -
Performance optimization summary of 35 java development codes
Foreword Code optimization is a very important topic. Some people may think it's useless. What can be changed in some …… -
String. In Java Summary of split() usage
In Java Lang package contains string The split () method returns an array I use some in the application to summarize f…… -
Eclipse tips
I'm used to developing Java programs in eclipse. The company's recent projects are all developed by idea. Meanwhile, A…… -
Explain in detail the usage of inheriting classes using externds keyword in Java
Understanding inheritance is the key to understanding object-oriented programming. In Java, an existing class is inher…… -
Java implements a simple chat room program based on UDP protocol
I've been relatively idle recently. I've been taking the time to review some technical applications in Java. Nothing t…… -
Overloading and rewriting instance code of Java functions
In Java, polymorphism can be divided into two types: compile time polymorphism (overloading) and run-time polymorphism……