Java
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Enhanced Java util. Cglib will throw illegalargumentexception when using the date class
I tried to use cglib to enhance Java util. Date. It's useless. I have no experience with cglib, so I want to know what…… -
Java – please recommend the view technology used in spring MVC 3 applications
I am looking for which view technology is considered the best method of spring MVC 3.0. It is flexible, maintainable a…… -
Is the Java hashtable #hashcode () implementation broken?
I wonder if the default implementation of Java's hashtable #hashcode () is broken when the hashtable only contains eac…… -
Java – passing listeners to custom snippets in Android
I'm creating a view pager in my application and using a class that extends fragment When I create an instance, I can p…… -
Java Apache POI, how to set the background color and border at the same time
At first I wanted to say that I was new in the developer world I tried to generate an excel table with a bordered mult…… -
How do I escape a set of special characters in Java in a method?
I use Lucene to search, but Lucene has a bunch of special characters to escape: - && || ! ( ) { } [ ] ^ " ~ * …… -
Java – JAXB: how to customize XML serialization of two fields
I have a legacy class with many public double fields Use double MAX_ Value initializes all double fields to indicate t…… -
Java – why can’t ‘a’ compile in C, but ` (a) `?
Why is + + I considered an l-value, but I + + is not? 11 int main() { int a = 0; ++a++; // does not compile …… -
Java – what slows down this clojure feature?
I work in clojure project Euler problem 14 I have a good general algorithm and I get the correct results, but it is di…… -
Java – specify the appropriate table size for hash
If I have a 1000 key, what is the appropriate size of my hash table? Solution This depends on the load factor ("percen…… -
Java – what is the difference between asinstanceof [x] and tox for value types?
My ability to use IntelliJ to convert java code into Scala code, which usually works well It seems that IntelliJ repla…… -
ORM – architecture of business object / database access layer
For various reasons, we are writing a new business object / data repository One of the requirements of this layer is t…… -
Java – link from HTML to JSP
In dynamic web projects, I have – default HTML page <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" …… -
Java – find all concrete classes that implement abstract classes in eclipse
Click "F3" of change class in eclipse, Change change = refactoring.createChange(monitor); I can open class java. publi…… -
Java – how to add text to textarea instead of replacing it
OK, so I have a little new Java. I'm curious about how to add text to a textarea instead of replacing it I Know. Sette…… -
Java – button text disappears in KitKat (API level 19)
The main menu of my application (a game) uses standard Android buttons In addition to nexus 7 and Android 4.4 All equi…… -
Java – about the precision of float type
I can't understand why float f = Integer.MAX_VALUE; System.out.println(Integer.MAX_VALUE); System.out.println((int)f);…… -
Java – default parameter in jar manifest
Is there any way to create a jar file that contains some parameters passed to the main class? (no need to add paramete…… -
Java multithreading in notebook computers with quad core processors
I'm reading a java tutorial that says that actual multithreading does not occur on a machine with a single processor I…… -
Java: can I use two different names in an enumeration to count the same thing?
I have an enumeration course with main directions (North, East, South, West): public enum Direction { NORTH,EAST,S…… -
Java – forkjoinpool – why does the program throw outofmemoryerror?
I want to try forkjoinpool in Java 8, so I wrote a small program to search all files with names containing specific ke…… -
jpa – persistence. XML is used for multiple persistence units
I try to hold the same entity in MySQL and Postgres databases (this is mainly to identify any inconsistencies and expl…… -
Creating general Lambdas with Java
In Java, you can add a type parameter to a static method to create a method that handles generics Can you do the same …… -
Java – how to use graduates to delete specific permissions when building Android applications?
Recently, Google automatically merged licenses from Google services to the final version of APK My problem is that som…… -
How to use Java 8 stream iteration nested for loops to reference parent elements?
I want to use the Java 8 stream to iterate over the nested list and extract some results of the list at the first matc…… -
Java – use ActiveMQ, camel and spring to implement the request reply mode
I'm trying to implement the following features: Then read the CSV file line by line: >Build the request according t…… -
Java – spring boot and thymeleaf – remove strict HTML error checking
I use spring boot as an MVC application, and my view technology is thymeleaf One thing I need to do is copy the HTML o…… -
Java – Android – can you publish different applications with the same keystore file in multiple accounts?
There is already an answer to this question: > can I use the same keystore file to sign two different applications?…… -
How to clear HTTP from Java?
I am trying to perform purge using httpurlconnection as follows: private void callVarnish(URL url) { HttpURLConnec…… -
When compiling java with different versions of JDK, the same target and source versions are guaranteed to perform the same operation?
We will update our CI system from Java 7 creation to Java 8 After that, we want to migrate the projects to Java 8.0 on…… -
Java – how to improve the reliability of e-mail sending and delivery?
Current applications use simple java mail to send several emails a day, but some emails will never be sent to the clie…… -
Java – slf4j log4j recorder does not record
I want to use slf4j-log4j for the first time In each Java class, I define such a recorder: private org.slf4j.Logger lo……