Java
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Java – does the order in the declaration of multidimensional arrays affect the memory used?
How many bytes do you want to allocate for a and B? import android.graphics.Bitmap; Bitmap[][][] a = new Bitmap[1000]…… -
Java method for saving the current state of the program
Can I save the current state of the Java program and reload it? The plan is rather complicated I just need to be able …… -
MVC Java config – handlerinterceptor does not exclude paths
I have an MVC Java configuration, but handlerinterceptor does not exclude some modes On the line marked XXX, if 1) I a…… -
Collection – give me a multifunctional practical use case
I want to know some actual use cases (it would be better if they had no association / binding with any programming lan…… -
Java – how to use CMU Sphinx 4 for voice and text of English voxforge model
I tried to find out how to use sphinx4 or pocketphinx with the English voxforge model, but I couldn't make it work I'v…… -
Java – streaming or custom jars in Hadoop
I run streaming media jobs on Hadoop (Amazon's EMR) and use mapper and reducer written in Python I want to know if I i…… -
Java – Hadoop – mapper constructor args
Is there any way to provide mapper constructor args in Hadoop? Libraries that may create jobs through some packaging? …… -
Optimize memory usage of string collections in Java
I have a large number of name value pairs (about 100k), and I need to store them in some kind of cache (such as hash m…… -
What is the method size of Java – JIT automatic inlining?
I've heard about JIT auto inlining small methods, such as getters (they have about 5 bytes) What is the boundary? Is t…… -
Java – is there any way to create a shortcut in eclipse and move the cursor to column n of the current row?
I have to follow some strict indentation rules for Java code In many cases, I have to jump to column 26 or 28 of the c…… -
What does this use of Java generics mean?
I want to know that the first < T > represents the following java code line I've read several tutorials on gener…… -
Data annotations – customize data annotations using RIA services
If you use riaservices with custom validatorattributes, this is one or more warning words This is senario. I am creati…… -
Java – scroll to the top of the page in a GWT application
I have a GWT application and I want to use this method to scroll to the top of the page: public static native void scr…… -
Java – place the component on the glass pane
I have a subclass of jlabel that forms a component of my GUI I have implemented the ability to drag and drop component…… -
Java – using static init blocks
I know how static init blocks work Solution When you want to initialize one or more static variables in one place It i…… -
Arrayblockingqueue of Java concurrency collection_ Power node Java college sorting
Arrayblockingqueue introduction Arrayblockingqueue is a thread safe bounded blocking queue implemented by array. Threa…… -
Thread pool principle of Java concurrency thread pool (4)_ Power node Java college sorting
Introduction to rejection policy The rejection policy of thread pool refers to the processing measures taken when a ta…… -
On java object-oriented array information processing
Although it is very simple, it should be of great help to some novices who are self-taught and Mengxin who do not unde…… -
Linkedblockingdeque of Java concurrency set_ Power node Java college sorting
Linkedblockingdeque introduction Linkedblockingdeque is a bidirectional concurrent blocking queue implemented by a bid…… -
Condition condition of Java concurrency_ Power node Java college sorting
Condition introduction The function of condition is to control the lock more accurately. The await() method in conditi…… -
Java uses regular expressions to remove redundant zeros after the decimal point
This article illustrates how Java uses regular expressions to remove redundant zeros after the decimal point. Share wi…… -
Fair lock of Java concurrency (2)_ Power node Java college sorting
Release fair lock (based on jdk1.7.0_40) 1. unlock() Unlock() in reentrantlock Implemented in Java, the source code is…… -
In depth analysis of date and time of new features in Java 8_ Power node Java college sorting
Dates are a key part of business logic computing, and any enterprise application needs to deal with time issues. Appli…… -
Concurrentskiplistmap of Java concurrency collection_ Power node Java college sorting
Introduction to concurrentskiplistmap Concurrentskiplistmap is a thread safe and ordered hash table, which is suitable…… -
Atomiclongfieldupdater atomic class of Java concurrency_ Power node Java college sorting
Atomiclongfieldupdater introduction and function list Atomiclongfieldupdater can perform atomic updates on members of …… -
Locksupport for Java concurrency_ Power node Java college sorting
Locksupport introduction Locksupport is the basic thread blocking primitive used to create locks and other synchroniza…… -
Java concurrency lock_ Power node Java college sorting
According to the time when the lock was added to Java, the lock in Java can be divided into "synchronous lock" and "lo…… -
Callable and future of Java concurrency thread pool_ Power node Java college sorting
Introduction to callable and future Callable and future are an interesting pair. We need them when we need to get the …… -
Java generates excel instance code through Apache poi
First, jar Maven add dependency At first, I thought it was POI, and then I directly added the dependence of POI. Who k…… -
Java httpurlconnection sends file and string information
Java httpurlconnection sends file and string information Transfer parameters in the form of documents Pass parameters …… -
Thread pool principle of Java concurrency thread pool (2)_ Power node Java college sorting
Thread pool example Before analyzing thread pools, let's look at a simple thread pool example. Operation results: The …… -
Example of Java using socket communication to transfer files
This article gives an example of how Java uses socket communication to transfer files. Share with you for your referen……