Java
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Java – Sam type optimization
The working document describing the status of project lambda refers to the so-called Sam (single abstract method) type…… -
Java – using AOP XML loading time weaving in AspectJ
According to my understanding, in order to use AOP XML file for load time weaving, it must be placed in meta - inf Is …… -
Java – realm: change the name of the migrated field
I want to change the field name during the real DB migration Is it correct? It takes a lot of time The following code …… -
Java – is there a more portable way to encapsulate pointers than jlong in JNI?
I've seen an example of using long / jlong to allow Java objects to hold C pointers: class Foo { private native lo…… -
Java – Mac hosts do not like docker container port forwarding
This is my first attempt to use docker. I'm trying to make a @ L_ 404_ 0 @ boot web application runs in docker contain…… -
Java – how to find the parent JSON node when parsing JSON
I'm using Jackson to parse JSON streams The API I'm using is objectmapper readTree(..) Consider the following flows: {…… -
What is the appropriate media type for Java – Hal JSON?
I'm using spring to create restful services, and I'm curious about the syntax of media types According to my understan…… -
Java – Liferay API / jsonws page can only be accessed by administrator users
Anyone can tell me how to restrict ordinary users from accessing Liferay API / jsonws pages The API / jsonws page can …… -
Write 3D games in Java
Hi, I started learning java this summer because I like creating games very much I managed to master the Java se core. …… -
Java – log4j: error with Tomcat 6
I wrote a web application in Java EE I use log4j and Tomcat 6.0 28. When I start my application in tomcat, an error me…… -
Java – log4j2: the location where the log4jcontextselector system property is set for asynchronous logging
I tried to set asynchronous logging in the rest web method currently running in the free profile server (for performan…… -
Select a Java Web Framework 2011
My question is based on the following question: choosing a java web framework now? The reason for my problem is that a…… -
How to make indexof case insensitive in Java
I have a simple question How to use @ L_ 419_ Make indexof case insensitive in 0 @ This question has been answered in …… -
Java: the reference to static context is similar to class self reference ‘this’, which is often used as the coding style
As mentioned in Python, I have been using class self - reference since the recent beginning of Java, whether it is man…… -
How do I find infinite loops in Java Web applications?
One day, the CPU utilization of our Java Web application reached 100% We try to find the problem by using kill - quit …… -
What methods can represent weighted directed graphs in Java?
I can't use any external libraries, so I try to think of some ways to build my own data structure I was thinking maybe…… -
Java EE – why are stateless beans considered pseudo scopes and cannot have circular dependencies?
Using wildfly 8.1, I have several beans, and I try to inject several EJBs into each other It can be said that I have t…… -
When to use ‘Java util. Objects.*’？
I'm browsing the seven functions of Java. They talked about Java util. Objects course What I can't understand is the f…… -
Java – file upload “multipart / form” exception org apache. commons. fileupload. FileUploadBase $InvalidContentTypeException
I tried to upload a file using Apache commons, but threw the following exception org. apache. commons. fileupload. Fil…… -
Java – classpath problem using xpathfactory
I encountered the following exception on one of the real-time servers (other servers running the same code seem to hav…… -
Java – J2ME networks, threads and deadlocks
The simple MIDlet code (class MOO) is locked (after excerpt) (at least I think it is locked after reading this article…… -
java – . Time format used in ICs file?
I'm creating one in Java ICs file, I need to know the date and time format to use This is the current format of my ICs…… -
Why is BigInteger in java designed to be immutable?
In Java, BigInteger is immutable, but I want to understand why, because it is often used to do many calculations that …… -
java – MyBatis 3.0. 1 insert questions
I decided to move one of my projects from ibatis to mybatis and encountered an insertion problem mapper xml： <?xml…… -
Java – read and write files that contain UTF – 8 (different language) characters
I have a file, It contains the following characters: “Joh 1：1ஆதியிலேஆதியிலே்த்தைதை்தது,அந்ததவாரதததைதைதைதைதைதைதைதேவனிட…… -
Java – how do I remember the last value in the swing GUI form?
I have a simple java GUI form made with swing It has some text input and check boxes, and I want it to remember the la…… -
Simple java pyramid – using system out. Printf() format output
Objectives: I am trying to generate a pyramid similar to the format given below This requires a basic Java program tha…… -
Java – realmobject and Parcelable
I'm new to real for Android, so I'm not sure if I'm getting close to this problem correctly I have a class that looks …… -
Java – get the first 10 values in the hash map
I tried to figure out how to get the top 10 values from HashMap I initially tried to use treemap and sort by value, an…… -
Java optimizer and redundant array evaluation
This is a very basic problem about Java optimization If you have a simple for loop, iterate over the array and use arr…… -
Java – CRC-16 with 0xa001 polynomial
I want to calculate CRC - 16 checksum of byte array with 0xa001 polynomial But I really don't know how to use it in Ja…… -
Java – intercept exceptions
I want to use custom exceptions so that a user - friendly message appears when any sort exception occurs What is the d……