包含标签：Java 的文章
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Java – persistent connection with JDBC to MySQL
I have an application that uses JDBC to connect to MySQL In some cases, the JDBC connection is idle for hours (or even…… -
Imposing constraints or restrictions on method bodies in Java
Context (Edit) Some clarifications are needed, so I will try to summarize the impact >The goal of the project is to…… -
Java – the ability to get progress on future objects
Refer to Java util. Concurrent package and future interface. I noticed (unless I was wrong) that the function of start…… -
java-ee – Web. XML: invalid content found starting with element JavaEE
I encountered this error on the eclipse ide <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http:/…… -
Java – is this vague method error eclipse Juno wrong?
I've been playing eclipse Juno today From Helios, this is a good upgrade Everything is fine except for a new compilati…… -
Java – how to forge initialcontext using default constructor
All, I try to do some unit tests in some old java code (no interface, no abstraction, etc.) This is a servlet using Se…… -
Java – creates an N by N diagonal matrix using basic logic
I want to create a matrix of N size, where n is a globally defined constant value. Now I just want to create a matrix …… -
Java – stop long running threads accessing the database
I started a few threads, but I didn't have a reference signal, a stop signal or something I am using a ThreadGroup and…… -
Java – get wrap_ Content height
My goal is to animate an invisible linear layout when a specific button is clicked To do this, I set the default heigh…… -
Setting variables by name in Java
I'm looking for something to implement in Java: class Foo{ private int lorem; // private int ipsum; public s…… -
What does Java – equals (object obj) do?
I often find an equal way in different places What does it actually do? Do we have to have this important in every cla…… -
Wrapping C / C in Java++
I develop applications in C / C + + I prefer these two languages and like to be a C developer I want to know how to cr…… -
Java – converts comma separated values to lists
Suppose I have a set of numbers, such as 1,2,3,4,5,6,7 inputs as a string I want to convert these numbers into a long …… -
Libgdx collision detection with tiledmap
I'm trying to implement a collision detection system by tiling maps I have a 2D Pokemon style game with a tiled map Sp…… -
Java – custom string class creation
I tried to use Java. Net in my eclipse workspace Lang package to create a custom class string Now I'm confused 1) why …… -
Java – dagger 2
Using dagger 2, I tried to inject singleton objects at multiple locations within a single range However, it seems that…… -
Java – how to deal with underflow in scientific computing?
I'm studying probabilistic models. When reasoning about these models, the estimated probability may become very small …… -
Java – after reasoning, l must be specified as long, F and D as float and double
Here are a few related questions According to the title, why should you specify the variable type as long or float, do…… -
Java – how do I call a parent private method from child?
See English answers > How can a derived class invoke private method of base class? 7 public class A{ private in…… -
java – Mockito ClassCastException
The method I want to test has a for loop and the logic of each element in blist: class A { void someMethod(){ …… -
Java – timer – how to calculate the difference between two dates using joda time?
I want to use joda time to get the difference between P (start time) and Q (end time) twice P and Q may be different d…… -
How to use byte array as a short article in Java
I have a byte array with size n. this array really represents n / 2 with different sizes Before writing an array to a …… -
Java – mongodb selects all fields, groups them by one field, and sorts them by another
We have a collection of 'messages' for the following fields _id | messageId | chainId | createOn 1 | 1 …… -
Java – liquibase inserts bit column, mysql, column with too long data
In liquibase, I define a table with a column of type bit (1), <changeSet author="foobar" id="create-configuration-t…… -
java. io. StreamCorruptedException: invalid type code: AC
See English answer > StreamCorruptedException: invalid type code: AC1 private ArrayList<Cheque> cheques = nul…… -
Java – which file is the eclipse deployment assembly configured in?
I don't seem to be here The configuration was found in the project file I'm looking for a way to programmatically chan…… -
Java – lists all possible subsets
I have a list of elements (1, 2, 3), and I need to get a superset (no duplicate elements) of the list So basically I n…… -
Java – how do I call a parent private method from child?
See English answers > How can a derived class invoke private method of base class? 7 public class A{ private in…… -
What happened to Emacs Java?
First of all, I don't want to start a religious war here. Forgive me for telling you a little story first I initially …… -
Java – is there any 2D game engine better than libgdx?
I started programming with libgdx a few months ago, and I found many basic tutorials I like the cross platform nature …… -
Java – MVN jetty: running failed to find my loginservice
I set up a dock security domain as follows (for MVN jetty: run) POM xml <plugin> <groupId>org.mortbay.…… -
Put the object into Java util. In properties
I'm trying to understand why I implemented Java util. Properties. It has two interfaces: getproperty / setproperty, wh……