Recent questions tagged java

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java - Android LiveData - how to reuse the same ViewModel on different activities?

Example ViewModel: public class NameViewModel extends ViewModel { // Create a LiveData with a String private ... Is that possible? 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 - String delimiter in string.split method

I have following data: 1||1||Abdul-Jabbar||Karim||1996||1974 I want to delimit the tokens. Here the ... is not giving the required result. 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 change card layout panels from another panel?

I Googled for a lot, and no solutions found. I think there shall be java masters to help me out ... This is ... .. any one got any soution here! 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 - Guice: is it possible to inject modules?

I have a Module that requires some Depedency. Is there a way Modules themselves can be injected? I realize this ... must be missing something... 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 - Runnable is posted successfully but not run

In an existing Android project I've encountered the following piece of code (where I inserted the debugging litter) ... phone and android-3 sdk) 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 - ANTLR4 visitor pattern on simple arithmetic example

I am a complete ANTLR4 newbie, so please forgive my ignorance. I ran into this presentation where a very ... always have higher precedence. 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 unit test constructors

I have a class I am adding unit tests to. The class has several constructors which take different types and ... 't change the original class. 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 - Attach debugger to application using Eclipse

Can you attach to a running application using Eclipse, similar to how you attach using Visual Studio? 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 is the purpose of dependency-reduced-pom.xml generated by the shade plugin?

I read over the docs and didn't find anything that talks about what it's used for. 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: pass function reference to AsyncTask

I'm new to android and very used to web developing. in javascript when you want to perform an asynchronous task ... run it. any suggestions ? 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 is the use of encapsulation when I'm able to change the property values with setter methods?

I try to understand a lot of times but I failed to understand this. Encapsulation is the technique of making ... the real use of encapsulation? 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 implement an async Callback using Square's Retrofit networking library

As an iOS developer beginning to work with Android I came across Retrofit. I understand how to implement synchronous ... README with this info. 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 - Exception : mockito wanted but not invoked, Actually there were zero interactions with this mock

I have interface Interface MyInterface { myMethodToBeVerified (String, String); } And implementation of interface is ... suggest some solutions. 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 - Closing a ByteArrayOutputStream has no effect?

What does this statement, "Closing a ByteArrayOutputStream has no effect" (http://java.sun.com/javase/6/docs/ ... release the memory? 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 can I find out if code is running inside a JUnit test or not?

In my code I need to do certain fixes only when it is run inside a JUnit test. How can I find out if code ... like JUnit.isRunning() == true ? 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 - Transactional annotation not working in Spring Boot

@Transactional not working in Spring Boot. Application.java : @EnableTransactionManagement(proxyTargetClass=true) ... Buhryn/interviewer See Question&Answers more detail:os...

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

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242 views

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java - How to repeat a task after a fixed amount of time in android?

I want to repeatedly call a method after every 5-seconds and whenever I wish to to stop the ... m_handler.removeCallbacks(m_statusChecker); } 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 - Drag and Drop nodes in JTree

I am having difficulty creating a JTree that allows the nodes to be reorganized by dragging and dropping them in ... would be great. 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 - In JDBC, when autocommit is false and no explicit savepoints have been set, is it good style or a waste to rollback?

Say you have the following code: Connection conn; try { conn = ... // get connection conn.setAutoCommit( ... whether adding it was superfluous. 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 - final transient fields and serialization

Is it possible to have final transient fields that are set to any non-default value after serialization ... test$X@1a46e30 {} test$X@190d11 null See Question&Answers more detail:os...

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

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265 views

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java - How do I get request url in jsf managed bean without the requested servlet?

Assuming the URL is http://localhost:8080/project-name/resource.xhtml, I want to obtain the following http:// ... in a JSF managed 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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126 views

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java - How to change all the activity transitions at once in Android application?

I know I can change activity transition using the following code right after startActivity() or finish() ... AndroidManifest.xml? 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 do I setup a private, remotely accessible Maven repository?

I need to set up a Maven repository for some internal company libraries, that need to be accessible only to our ... . How can 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 - Connecting to external database - Android application

I am writing an application for my third year project. The application will require interaction with an external mySQL ... 0.4. Thanks everyone! 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 search for a string in JAR files

My application is built on Java EE. I have approximately 50 jars in this application. Is it possible to search ... for a keyword BEGIN REQUEST)? 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 write a unit test for a Spring Boot Controller endpoint

I have a sample Spring Boot app with the following Boot main class @SpringBootApplication public class DemoApplication { public ... () { } } See Question&Answers more detail:os...

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

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102 views

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java - What is the purpose of ByteBuffer's flip method? (And why is it called "flip"?)

Why does ByteBuffer's flip() method called "flip"? What is "flipped" here? According to apidoc, two ... flipped with some other data? 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 - Use JSTL forEach loop's varStatus as an ID

I want to use the count from the JSTL forEach loop, but my code doesnt seem to work. <c: ... .jsp.jstl.core.LoopTagSupport$1Status@5570e2" > See Question&Answers more detail:os...

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

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