Recent questions tagged JAVA

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java - A good working example of Selenium2 and webdriver

I've been using selenium 1, but now want to migrate to selenium2/webdriver. To be honest, I find a little ... this example? 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 - How to search for a node in a binary tree and return it?

I'm trying to search for a node in a binary tree and return in case it's there, otherwise, return null. By ... return null; } Is this 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 - Is it possible to have persistence.xml in a location other than META-INF?

I want to have my persistence.xml in conf folder of my app. How can I tell Persistence.createEntityManagerFactory ... read it from there? 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 - Don't understand how to use GridLayout.spec()

This GridLayout is going in my app that has a lot of levels. Each level has a different number of rows and ... helps explain what the Specs are? 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 - m2eclipse cannot update index from central repo

I have just downloaded and installed M2Eclipse, but it fails to update the index of the central repo. At ... and Settingsuser.m2 epository) 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 copy directory via scp within gradle task?

What is a clean and elegant way to copy a bunch of files via scp with Gradle? Two ways I currently see ... more obvious) ways to approach 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 - OutOfMemoryError what to increase and how?

I have a really long collection with 10k items, and when running a toString() on the object it crashes. I need ... don't run the command line. 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 - Listener for a Stage minimizing, maximizing, etc

I am just starting my second JavaFX projects, and I need to know when a Stage is being maximized. In Swing, this ... there any way to 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 - Display each list element in a separate line (console)

In this part of code: System.out.println("Alunos aprovados:"); String[] aprovados = {"d", "a", "c", "b"}; List< ... Or, at least: a, b, c, d 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 the EJB client locate the EJB server without url?

I am new to Java EE. At present I am going through The Java EE 6 Tutorial, Volume 1 (Basic Concepts Beta) ... can find the answer? Thank you. 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 - DecimalFormat pattern

public static String formatAmountUpToTwoDecimalNumber(String amount) { if(amount==null || "".equals(amount)) { return ... Thanks for the help. 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 convert a 24 Bit PNG to 3 Bit PNG using Floyd–Steinberg dithering?

How to convert a 24 Bit PNG to 3 Bit PNG using Floyd-Steinberg dithering? java.awt.image.BufferedImage should be ... order to achieve the goal? 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 get context parameter value in jsp.?

<context-param> <param-name>productSearchRPP</param-name> <param-value>8</param-value> </context-param ... productSearchRPP in products.jsp page See Question&Answers more detail:os...

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

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310 views

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java - Why my pessimistic Locking in JPA with Oracle is not working

I'm trying to implement some kind of semaphores for cron jobs that runs in different JBoss nodes. I'm ... anotehr strategy? 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 - W/CameraBase﹕ An error occurred while connecting to camera: 0

There was a similar question but it went unresolved: W/CameraBase﹕ An error occurred while connecting to camera: 0 ... up camera like 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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352 views

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java - How to make JComboBox selected item not changed when scrolling through its popuplist using keyboard

I have a JComboBox component in the panel and ItemListener attached to it. But it gets fired after every up/ ... item, but pressing Enter does. 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 - JPA Multiple Transaction Managers

I have one applicationContext.xml file, and it has two org.springframework.orm.jpa.JpaTransactionManager (each ... are transaction managers. See Question&Answers more detail:os...

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

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321 views

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java - Passing parameter to Cassandra CQL query using DataStax client

I am using datastax as a client for connecting to cassandra. I have successfully connected to cassandra cluster/keyspace/ ... I go about 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 - FileInputStream vs ClassPathResource vs getResourceAsStream and file integrity

I have a weird problem : in src/main/resources i have a "template.xlsx" file. If i do this : InputStream ... someone help me with this ? 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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272 views

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java - How to schedule my android app to do something every hour

I want my app to access database every hour and read next record from the table then update desctop widget and ... I reboot my phone? 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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276 views

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java - Is there a way to redirect input from file to stdin in Netbeans?

I'm developing application with Netbeans and Maven. My application should obtain data from stdin. But I could not ... java MyProgram < data.txt See Question&Answers more detail:os...

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

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169 views

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java - Why is the version property not set with Spring Data JPA?

Wanted to know how is @Version annotation in Spring Data REST put to use for ETags, I do not see the ETags ... getETag()); This assertion fails. 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 - Adding image to JFrame

So I am using Eclipse with Windows builder. I was just wondering if there was anyway I can import an image ... and size and drawing 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 - Spring - Path variable truncate after dot - annotation

I am trying to set up a REST endpoint that allows querying a user by their email address. The email ... suffix pattern truncation without xml? 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 check if a string is date?

I am having string like "11-04-2015 22:01:13:053" or "32476347656435" How can I check if string is Date? Checking ... String regex = "[0-9]+"; See Question&Answers more detail:os...

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

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633 views

1 answer

java - Update database schema with hibernate

<property name="hibernate.hbm2ddl.auto">update</property> i can create my database schema, it automatically add ... the database schema? 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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220 views

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java - Why doesn't setLocation() move my label?

I have the following code where I try to place a JLabel in a custom location on a JFrame. public class GUI ... moving to where I want 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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297 views

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java - Programmatically connect to paired Bluetooth speaker and play audio

In our app, I'd like to connect to a previously paired A2DP Bluetooth Speaker and direct audio playback to ... this would be hugely 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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