Java
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“Goto” — label in Java
There is no goto in Java, but goto is a reserved word. For example, int goto; It's illegal. However, there are tags in…… -
Hibernate learning notes 2
Hibernate mapping One to many, one to one, many to many One to many mapping Common attributes of the set element …… -
Query on “minimizing repeated calculation of variables in the for loop”
In the following article: Described in '': Operation effect: a. b. c. d. Summary: a lot of data has been tested, indic…… -
A demo tells you the power of the optimization algorithm
The demo here is an accumulation algorithm, such as 1,2,3,4 n That is: sum = 1 + 2 + 3 + 4+ n; We can do this: Another…… -
Maven with Multi-module
Well,A project made of multi modules. For example,the hongten-security project,the structure of the hongten-security p…… -
Shift operators in Java: <, > >, > > > summary
There are three shift operators in Java < <: shift left operator, Num < < 1, equivalent to num multiplied …… -
Hadoop 2-mapreduce details
This article is about Hadoop 2 MapReduce version 2.0 will be explained in detail. Please pay attention to the version,…… -
Maven’s first applet
Here is the first applet about Maven About Maven installation: First look at the directory structure: This is the orig…… -
Using code to automatically generate packages in eclipse_ This function is very useful_ Java version
I did an experiment before, that is, I used code to automatically create a new package in eclipse, which was not imple…… -
Java multithreading series_ Create a thread using the runnable interface (3)
A class implementing the runnable interface must use an instance of the thread class to create a thread. Creating a th…… -
Java RMI overview
The advantage of RMI is that you don't have to write network or I / O code yourself. A client program invoking a remot…… -
File upload principle_ Sorting + summary
File upload is a problem we often encounter. The form has a) attribute, For information about the form, please refer t…… -
Cannot create PoolableConnectionFactory (Communications link failure)–Connection refused: connect
I encountered such an exception when I was working on a web project today: I know there was an error connecting to the…… -
Original Java shell
If you have been exposed to Windows operating system, you should have a certain understanding of CMD in windows. If yo…… -
Java access control
Java provides four access rights: Public > protected > package access rights (no keywords) > private Packages…… -
Java inner class_ Let you see_ Don’t be confused anymore
In a blog: "you can learn something about Java inner classes, but there are still some places in the inner classes tha…… -
Complete expression of interface in Java
When I use a tool: Java decompiler decompiler to view the jar package source code, the following code appears: I searc…… -
Java copy, move, and delete files
< H2 id = "% E5% A4% 8D% E5% 88% B6% E6% 96% 87% E4% BB% B6% EF% BC% 9A" > copy file: < div class = "cnblogs_…… -
Java reflection – dry goods
After reading many articles on java reflection, I summarized what I saw. Help yourself and others more or less. First,…… -
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Whether the list record in Java exactly matches the method
Today I want to talk about grouping the list and then encapsulating it with map. Maybe you still have some ambiguity a…… -
There are several states of Java objects in hibernate. How are they related to each other (distinction and mutual transformation)
I spent some time understanding several states of Java objects in hibernate. It's easy to understand. Here's a record …… -
Java development_ Imitate Baidu Library_ OpenOffice2PDF_ Source download
I've been studying and imitating things similar to Baidu Library these days. Here I'll share with you what I've done m…… -
Get the image file(s) some informations,Including the Make,Model,Date/Time,etc
This is a blog about how to get the image file(s) some informations. Including the Make,Model,Date/Tiime,etc. while,ho…… -
For an algorithm with a running time of 100N * n, what is the minimum value of n to make it run faster on the same machine than an algorithm with a running time of 2 ^ n
In the first part of the introduction to algorithms, there is such an algorithm problem: Here are my own ideas for sol…… -
Java abstract classes and interfaces
When the base class is abstract, some functions cannot be implemented. For example, for animal classes, you can know h…… -
Java development_ UUID (universal unique identifier) and guid (global unique identifier)
: global unique identifier is also called UUID (universal unique identifier). So GUID is UUID. GUID is a 128 bit long …… -
Java unit test sequential execution
It's killing me. It turns out @ before will execute many times. Sequential execution can be realized through the funct…… -
Java development_ Summary of double precision loss
I saw such a question on the blog: Such a problem is the loss of precision of double in Java (or c#). Here is the solu…… -
There is such a way to remember words_ Java version of irregular verbs_ Recommended by bloggers
Yesterday, when I was reading the irregular verbs in an English book, I had a sudden inspiration: I want to use the pr…… -
You can also use Java swing to make such a dazzling MP3 player_ Source download
I had published the blog ： and to display some screenshots about this MP3 Player. The target for this blog is that to……