Recent questions tagged Java

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java - Documenting Spring's login/logout API in Swagger

I am developing demo REST service using Spring Boot where user has to login in order to to perform ... passwordEncoder(passwordEncoder()); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Why instance variables get initialized before constructor called?

I have this following piece of code: public abstract class UCMService{ private String service; protected DataMap ... why it is happening. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - to get columns from Excel files using Apache POI?

In order to do some statistical analysis I need to extract values in a column of an Excel sheet. I have ... to tackle this problem? Thanks, See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JavaFx 2.x - Swing : Not on FX application thread

I am trying to use JavaFx 2.x and Swing application by using a JInternalFrame in which attach a JFXPanel My code ... can I solve this problem? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Assigning Hashmap to Hashmap

I have a hashmap which I want to copy for other use. But whenever I copy it and reuse it, it also changes the ... .getValue()); } return copy; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - HttpClientError: The target server failed to respond

I am trying to hit a server using HTTP client using PoolingClientConnectionManager setting max connections for ... /html/connmgmt.html See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - VelocityEngineUtils has been removed in Spring 3.2 so what else to use?

Today I have upgraded my entire Spring web application from using Spring 3.1.1 to Spring 3.2. Most part ... Spring walking away from Velocity? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Is having a single threadpool better design than multiple threadpools

What are the advantages and disadvantages of having more than one threadpool in Java? I have seen ... ThreadPoolExecutor for everything else. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Injecting fields via Spring into entities loaded by Hibernate

I am looking for a way to inject certain properties via Spring in a bean that is loaded from the DB by ... injected with the object creation? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Android: How to avoid that clicking on a Notification calls onCreate()

In my application I notify the user with notifications, if something special happens: public void triggerNotification(String ... I'd like to. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to get the selected node in the package explorer from an Eclipse plugin

I'm writing an Eclipse command plugin and want to retrieve the currently selected node in the package explorer view. I ... How do I do this ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - List of JSF 2 events?

So far I have only known and seen <f:event type="preRenderView" listener="#{situationHelper.load}"/> and ... after components are bound) Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to attach source code of libraries downloaded with ivy

I use ivy with the ivy eclipse plugin to download dependencies. Works great. But how can I attach the source ... to step into these libraries? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Tomcat shuts down automatically

I'm using Apache and Tomcat on a Windows server and since this morning, Tomcat stops working without any logs. It ... webapp on another box... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Doubles, commas and dots

I'm making an Android Java program which is taking double values from the user. If I run the program on the ... with them both, comma and dot? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How does Server-Sent-Events work

I tried an SSE (Server-Sent-Events) using java on tomcat 8.0. Here are few things I noticed. I click a ... in my blog - Server Sent Events See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Constraint violation in Hibernate unidirectional OneToMany mapping with JoinTable and OrderColumn when removing elements

I have a problem when removing elements from a list mapped as described above. Here is the mapping: @Entity ... wrong with the mapping above? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - org.hibernate.dialect.OracleDialect does not support identity key generation

I was trying to import a sample project in to eclipse and was facing the below given error up on running the ... props> </property> </bean> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Are Axis2 generated stubs thread-safe?

Are client stubs generated from WSDL by Axis2 thread-safe? Of course, "thread-safe" isn't necessary a ... to discuss this more precisely. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Converting KB to MB, GB, TB dynamically

public String size(int size){ String hrSize = ""; int k = size; double m = size/1024; double g = size/1048576 ... 21MB but what I get is 1.00MB. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Inheritance , method signature , method overriding and throws clause

My Parent class is : import java.io.IOException; public class Parent { int x = 0; public int getX() throws ... throws clause , Ain't it ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Ruby and duck typing: design by contract impossible?

Method signature in Java: public List<String> getFilesIn(List<File> directories) similar one in ruby def get_files_in( ... 't really come up? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Converted SecretKey into bytes, how to convert it back to a SecretKey?

I convert the secretkey into bytes with following code SecretKey key = KeyGenerator.getInstance("DES"). ... : Inappropriate key specification See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to pass Context to AsyncTask?

How to pass context in Async Task class which is coded in different java file from Main Activity but it called ... { progressDialog.dismiss(); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - POI performance

I am using POI in my J2EE web application to generate a workbook. However, i find that POI takes around ... APIs known for better performance ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Getting the IP Address Of A client For a webservice

I am using JAX-WS and I am having trouble retrieving the client information that is consuming a webservice. I've ... have an idea about this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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180 views

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java - Selenium / Firefox: Command ".click()" doesn't work with a found element

I tried to find a solution to this thing and I spent a lot of time, but it is almost imposible to me to ... Does anybody know how to do that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - what tomcat native library should I be using in production?

When I compile my spring mvc app, I get this in the output: INFO: The APR based Apache Tomcat Native ... production that this is referring to? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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