Java
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Record Java comments
Are there any libraries that can record variables by adding comments: @Log String someValueToLog = someMethod(); @Log…… -
Java – using spring MVC and accepting post requests with wrong JSON will result in returning the default 400 error code server page
I'm using the rest API Receiving a post message with bad JSON (such as {sdfasdf}) will cause spring to return a 400 er…… -
Java HashSet equals C
If there is something similar to Java hash set in C, I'm curious I am a quick browsing data structure because I can on…… -
Java inheritance – instance variable override
Why is the instance variable of a superclass not overridden in inheritance? Solution Because inheritance is to modify …… -
Java – understanding eclipse classpath declarations
I'm trying to understand the eclipse classpath file, especially what I want to know: >How does JRE use it (that is,…… -
Java – using annotations to handle delayed binding to dagger2 diagram
On this issue, I talk about dagger 2 Dagger 2 basically consists of components and modules Here is an example: Suppose…… -
Error using Weka API: class attribute not set in Java code?
I tried to use the Weka API in my java code I use j48 tree classification to classify my dataset in MySQL database, bu…… -
Java – ehcache key type
In ehcache, when adding elements to the cache: cache.put(new Element("key1","value1")); // Element constructors : Ele…… -
Java – publish multiple ports with one service using jax-ws 2.0 and @ webservice
I want to create a soap service that exposes multiple port types, each of which has a separate interface I'm trying to…… -
Given that an object is an array of any type, how to test that it is empty in Java?
Please help me fill in my isempty method: public static boolean isEmpty(Object test){ if (test==null){ ret…… -
Java – use stack swap API
I have tried to upgrade the stack overflow problem with the stack exchange API and failed I've tried a lot, but I didn…… -
Index creation in elastic search through Java API
I use the following code to create an index in elastic search, Settings settings = ImmutableSettings.settingsBuilder()…… -
Java – hibernate L2 cache does not seem to work properly
I am currently trying to run hibernate using the cache provider that comes with hibernate net.sf.ehcache.hibernate.Sin…… -
Java – Eclipse: is there any way to use method bold in this class when displaying the method list (ctrl space)?
Erosion: When displaying the method list (ctrl space), is there any way to find the method name in this class in bold?…… -
Java – the problem of split code algorithm
I have successfully implemented a split code algorithm in Java The algorithm itself is very simple, but I have trouble…… -
Java – how to set default method parameter values?
See the English answer > does Java support default parameter values? 17 Example: if there is a method public int do…… -
Java. util. HashMap – why does HashMap extend abstractmap and implement it?
See English answers > Why do many collection classes in Java extend the abstract class and implement the interface …… -
Java – can I open several instances of eclipse at the same time?
I wonder if I can open several instances of eclipse at the same time I am using it for java development I know that I …… -
Java – JSON parser for J2ME
I need a basic JSON parser that works with J2ME / CLDC 1.1 Google search will return a lot of answers (some even on st…… -
Java – non static inner class objects are garbage collected after they are no longer referenced?
I have a spring bean similar to the following: public class MyServiceImpl { private MyDAO myDAO; public class…… -
Java – making multiplayer games via the Internet or the Internet
Hi, I wrote a multiplayer game in Java. I want to know what I need to learn and / or what I should use to make the gam…… -
Java – compare get / put operations of direct and indirect ByteBuffer
Get / put from direct ByteBuffer is faster than get / put from direct ByteBuffer? If I have to read / write from the d…… -
Java – “convert to trial resources” in NetBeans – cool beans?
Netbeans 7.1. 2 has the following codes: bufferedoutputstream bos = new bufferedoutputstream(new FileOutputStream(file…… -
Java – initializing arrays with values – should classes be displayed explicitly?
I often see arrays initialized like this: String[] array = new String[] { "foo","bar","baz" }; However, reading langua…… -
Java – a transaction (process ID) deadlocks when locked, communicates with another process to buffer resources and is selected as a deadlock victim
I have a java program for updating tables in MS SQL Web users can also access this table through the web site created …… -
Java – handling multiple benchmarks in swagger
I'm using swagger UI to provide good documentation of rest APIs for our clients Documents available: http://www.myhost…… -
How does Java 8 maptoint (maptoint (E – > e)) improve performance?
I'm reading the book "Java 8 Lambdas". At some time, the author said, "it's a good idea to use the original profession…… -
Tail call optimization of Fibonacci function in Java
I'm studying tail call recursion and found some of the documents mentioned Sun Java does not perform tail call optimiz…… -
Java – can I use libjpeg to read JPEG with alpha channel?
There seems to be some debate about whether JPEG of alpha channel is effective I always think the correct answer is th…… -
Java – when exactly are objects available for garbage collection?
I'm competing with my application for memory problems and trying to get my head close to garbage collection If I have …… -
Java – get selected elements from listview
I use the results of the database search to modify the listview so that I can use this option to create another databa…… -
Java automatically adjusts the font size to Windows 7
In Windows 7, if you change the font size through the control panel – > appearance and personalization – > displ……