Java
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Java – use JSTL tag to escape JSP el (dot character)
Some frameworks (spring, Tomcat itself) add servlet request attributes that cannot be used in El expressions by defaul…… -
javax. Mail What should I do with the debug = true option?
In my javax mail. In the configuration property of session, I set mail Debug = true, but for some reason, this does no…… -
Java – how to avoid creating redundant entities?
In my current project, I need to execute some native queries. These queries select some fields from the tables connect…… -
Java – use the account manager to authenticate using the Google API
I've been trying to solve this problem for days I'm trying to dial Google calendar using authentication through Androi…… -
Controlling logging levels through the WebSphere administrative console
I have a web application in which I use Java util. logging. In my logging In the properties file, the default level is…… -
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…… -
PowerShell – hashtable and custom object array about iteration
I often write lists of things and enumerate them to perform some get / set I hate enumerating hash tables because when…… -
java – Arrays. Sort (object []) did not throw ClassCastException
Code: public class CompareTest { public static void main(String[] args) { ArrayList list = new ArrayLis…… -
How to run sudo command for OS X in Java
I'm using the app in JavaFX. I'm trying to open an application using the command in the terminal. I'm using my java co…… -
Java – what to use: executeupdate() or execute()?
Please tell me which two methods of executeupdate and execute are the values (?,?,?) of the inserted user (name, addr,…… -
Java – how to convert a character stream to a string stream pair?
I want to take a string and convert it into a word stream For example: I have: {"a", "apple", "B", "banana", "C", "car…… -
java – Spinner subitem
I want to populate the spinner with projects that contain main text and sub text, as Android studio shows when buildin…… -
Java – how to instantiate unit in scala?
All I want is to use some concurrent sets (they don't seem to exist at all) Java uses Java util. concurrent. Concurren…… -
Java. When creating a file using RandomAccessFile io. FileNotFoundException
When I tried to create a file using RandomAccessFile, I encountered FileNotFoundException: RandomAccessFile file = new…… -
Java – reformat code using regular expressions
We have an ArrayList of items in several classes. Every time I want to insert a new item in the list, it will cause me…… -
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 – run each spring scheduler in its own thread
I have multiple components with @ scheduled annotation, and I find that spring starts only one at a time, even if they…… -
Java parseInt integrity check
I'm trying to parse an int from a string array element. Here's my code: String length = messageContents[k].replace("Co…… -
What are those Java threads that start with “pool”?
I have a problem with the Tomcat server that cannot be shut down normally I performed a thread dump after issuing the …… -
Java – how to capture TrayIcon Displaymessage() mouse click on the tooltip tone
Hi, I'm trying to show more details after the user clicks the mail balloon tooltip However, I can't find how to captur…… -
Looking for Java libraries that implement binary trees [closed]
Is there a Java library that can use binary trees? I don't expect to test and implement myself Solution The Java stand…… -
Add Java FX 2.0 to an existing NetBeans project
I have an existing Java project using swing in NetBeans, and I want to start using java FX 2.0 in some components of t…… -
Java – isn’t log4j thread safe after all?
(this is in sles11, Java 7, Tomcat 6, log4j-1.2.16) We use log4j to write different things to different log files I in…… -
Why does Erlang process creation and messaging take less time than Java and C#
I searched Erlang's process model on the Internet and found some chart slides 3-4 in a speech by Joe Armstrong They sh…… -
Java – how do I find and verify the encryption strength of the JDK security provider?
I have this applet that prints out all supported providers in my JDK installation, but I wonder if anyone knows how to…… -
Java – adds an object to the type of the “extended” common collection
public void addAllAnimals(ArrayList<? extends Animal> animalLikeList){ public void addAllAnimals(ArrayList<? …… -
java – sun. security. x509. Certandkeygen and sun security. pkcs. Pkcs10 – missing in jdk8 Implementation recommendations
In jdk8, the class sun security. x509. Certandkeygen no longer exists Sun. Com is still missing security. pkcs. PKCS10…… -
Java generics and factories
Establish: I have some formatter interfaces: interface Formatter<T extends AbstractItem> { String format(T ite…… -
Java – should I synchronize static volatile variables?
There are several questions about this problem, but most of them focus on this problem, because this is not the intent…… -
Java – viewrootimpl. In viewtransitioncoordinition Setpausedfortransition (Boolean) when NullPointerException is converted to another activity called prematurely
In my Android application, I have a startup screen where I make some settings and loads My application uses the defaul…… -
How do I determine the size of permgen in a Java application (that is, programmatically)?
>Is there any way to measure the permgen size currently used in my java application? I cannot use external analysis…… -
Preload Java classes / libraries at jar startup?
I wrote a thrift server in Java to take advantage of specific Java packages / libraries, but I'm not a java programmer……