Recent questions tagged JAVA

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How can I add a new Instance to an existing Instances object that I created ? Here is an example: ArrayList ... an interface ? Thanks in Advance 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 - Running two independent tasks simultaneously using threads

I've studied lots of tutorials on threads in java but I'm unable to find my answer. My question is: ... without using threads. Thanks in advance 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: Change application language on the run

I am making JavaFX desktop application with core components described in FXML and I would like to offer user the ... the language in JavaFX. 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 - Algorithm to find the shortest path, with obstacles

I have a collection of Points which represents a grid, I'm ... ,%20always%20visiting%20vertex%20with%20smallest%20minDistance%20first 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 - Howto return ids on Inserts with Ibatis ( with RETURNING keyword )

I'm using iBatis/Java and Postgres 8.3. When I do an insert in ibatis i need the id returned. I use ... i use the above statement with ibatis? 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 - Should I put my ThreadLocals in a spring-injected singleton?

Several people (eg at serverside http://www.theserverside.com/news/thread.tss?thread_id=41473) suggest that ... disadvantages of this approach? 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 prevent android app from crashing due to exception in background thread?

It's a general question, which raised from specific scenario, but I'd like to get a general answer how to ... case, I will appreciate the link 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 - Reading Client Certificate in Servlet

I have a Client Server Communication scenario in JBOSS and browser as client(JAVA PROGRAM). Initially when the ... public key in Server? 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 - Checked vs. Unchecked Exceptions in Service Layer

I work on a project with a legacy service layer that returns null in many places if a requested record does ... regarding our own service layer. 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 verify Android In-app Billing with a server with Ruby?

I am having trouble figuring out how to verify Androind In-app Billing purchases with my Ruby on Rails server. ... way to verify the receipt? 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 - Using PDFbox to determine the coordinates of words in a document

I'm using PDFbox to extract the coordinates of words/strings in a PDF document, and have so far had success ... kind of output is beyond me. 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 - Where are instance variables of an Object stored in the JVM?

Is an instance variable of an object in Java stored on the stack or method area of the JVM? Also, ... different from static variable storage? 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 - Tuning garbage collections for low latency

I'm looking for arguments as to how best to size the young generation (with respect to the old generation) in ... again a few millisecs at max. 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 - Testing Spring MVC annotation mappings

With Spring MVC, you can specify that a particular URL will handled by a particular method, and you can ... 4, @RequestMapping("getImage")? 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 - Netbeans Maven Project Not adding Main Class to Manifest

I am having a similar problem to this question. I have tried all the suggestions listed and am still at a loss. ... fix also, but to no avail. 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 create a count-up effect for a textView in Android

I am working on an app that counts the number of questions marks in a few paragraphs of text. After the ... be much-appreciated. Thanks, Richard 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 - Reordering of reads

Suppose there are two threads without synchronization, one sets n = 1 another executes method(). In the ... Is this reasoning correct? 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 create a Tcp Connection in spring boot to accept connections?

I have been through this and understood that I need to create a TcpReceivingChannelAdapter to accept connections. But I ... guide me over 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 - Changing locale at runtime in Swing

I would like to be able to change the locale in my Swing application at runtime and have all the text ... solution I can consider implementing? 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 - Creating entity class using database existing table?

I am having tables created by a DBA. And I want to have entity classes for each table for further ... the entity classes using eclipse? 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 - SOAP web service callback architecture?

I am quite new to web services, JAX-WS etc. so maybe noob question... So, I want to implement a ... callback messages from server to client. 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 make a Class extend Observable when it has extended another class too?

I am learning Java and I want to make my class into an observable class. However I already have it extending another class. What should I do? 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: Parcelable.writeToParcel and Parcelable.Creator.createFromParcel are never called

I'm totally new to posting questions on here, however I have been reading a lot on here for years. ... / thoughts would be appreciated. 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 - Communication between local JVMs

My question: What approach could/should I take to communicate between two or more JVM instances that are running locally ... (e.g. progress bar) 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 make MS SQL Server available for connections?

I'm trying to connect to MS SQL Server (running on my machine) from a Java program. I'm getting the ... is unavailable." Any other ideas? 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 - Check if a file exists before calling openFileInput

To read a file in Android from your app's private storage area you use the functionopenFileInput(). My question ... private area of my phone. 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 reuse the same connection with a Spring's JdbcTemplate?

I have the following code: @Test public void springTest() throws SQLException{ //Connect to the DB. ... the same connection? 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 - Advanced Code Hot Swapping in JDK 8?

I am looking for better HotSwapping in the JavaVM. Being able to only apply method body changes is okay but ... I not investigate into 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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