Recent questions tagged JAVA

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java ee 7 - Alternate docroot not working on glassfish 4

Im trying to set-up an alternate docroot in order to serve uploaded documents from. I have included the ... im doing wrong? Thanks Steve 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 Know an IP Address is a Wifi IP Address?

I want to know the whether IP address of an Android device is Data IP or Wifi IP. 1) Device as is connected to ... in 2.3.5 and Below. 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 - Obtaining the reference and key in Custom Object Firebase Android

I'm looking to pass the reference of the dataSnapshot and key of each specific object into a custom 'Message ... Firebase", before they updated. 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 - Weblogic Error: Caused by: weblogic.transaction.internal.AppSetRollbackOnlyException: setRollbackOnly called on transaction

I am porting an application from Jboss 7as to Weblogic 12c. So far, I am able to run the application and ... /> </properties> Please assist. 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 - Cast object (type double) to int

Okay, so if I have this code double a=1.5; int b=(int)a; System.out.println(b); Everything works fine, ... have to cast it to double first ? 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 - Can @TableGenerator save the last used id in the table instead of the next available?

I need to connect to a vendor db and insert customer data. The sequence table used to generate new customer ids stores ... id; } ... } 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 swing resize ImageIcon according to jLabel

i am a new programmer here and i have something to ask, i have browse a picture into my GUI (and set the path in ... (), "Canceled"); } } } 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 show URL as a click-able URL in Table and allow them to open in default browser?

I have Java Desktop application that displays some information in a JTable that may contain URLs with some text in some ... he/she clicks on 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 - Role of new keyword in Spring Framework

In the Spring Framework, it seems like beans are the preferred way of creating objects to use in business ... record = RecordDtoFactory.get(); 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 - Difference between JScrollPane.setviewportview vs JScrollPane.add

I faced this new thing today, and I didn't know why. When I want to show something in panel for example ... and what does setViewProtView() 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 - Spring @Scheduled task runs twice

I am creating an @Scheduled task to run every 5 seconds. As has been a problem in other questions, my task is ... </filter-mapping> </web-app> 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 - Best practice to decorate an ObservableList and retain change events

My datasource provides an ObservableList<String>, however for my ListView I need an ObservableList<Warning>. A ... and thus the ListView. 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 - Package and visibility

I'm making an SDK and I'm trying to separate classes to different packages, those classes use some other shared ... , how could I prevent 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 - Background color or Images shuffling on scrolling in recyclerview?

I am wondering that my images and color of layouts shuffling when i scrolls downwards or upwards, I created cardview ... jsonArray.length(); } } 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 auto generated id of Hibernate entity object in the equals and hashcode methods

Lovely equals and hashcode, all the theory is here and also here I have taken the decision to use the auto- ... Am I missing something 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 - Why does System.out.println have to be inside a method?

class Employee { int DOB; int eid; String name; double salary; System.out.println("Employee class"); } If I ... . Why is a method necessary? 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 decode android.os.Build.SERIAL?

I'm working on the recurring serial number topic to provide a unique id. I try this : String serial = null; ... version, as on the sticker. See Question&Answers more detail:os...

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

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161 views

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java - JOptionPane not displaying correctly?

Today I updated my jdk and docs from 7 to 8. I made a few changes to my program, and now when I try to ... width = Integer.parseInt(input4); } } 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 - Issue with ArrayList Serde in Kafka Streams API

Based on my previous question, I am still trying to figure out what's the issue with my code. I've ... /java/io/confluent/examples/streams/utils 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 - Custom header not inserted in request in servlet

There's a thrird party app that needs to get information via custom http headers, so I wrote a simple test app ... How can I fix it ? 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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199 views

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java disc based hashmap

I'm working on a web crawler (please don't suggest an existing one, its not an option). I have it ... values together etc. 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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354 views

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java - How to call an executable jar from php with an argument passed to main method

I have created an executable jar and it works fine. For the testing purpose, I have used a dummy variable ... can I accomplish the aforesaid? See Question&Answers more detail:os...

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

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167 views

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java - How to prevent the result of Servlets from being cached?

How can I stop caching of pages in browser using Servlets? I want that session should expire if I press back ... browser when i am logged in. See Question&Answers more detail:os...

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

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193 views

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java - Comparable VS <? extends Comparable>

regarding the following code: public class Test <T extends Comparable>{ public static void main(String[] args){ ... compile? 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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302 views

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java - Most specific method with matches of both fixed/variable arity (varargs)

In section 15.12.2.5 of the Java Language Specification, it talks about how to choose the most specific method ... relevant bit of the spec? See Question&Answers more detail:os...

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

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143 views

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java - How does Firebase sync work, with shared data?

I use Firebase to handle the Auth topic of my Android app. I also save a user profile on Firebase, that ... I force having online 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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386 views

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java - Set a default row prefetch in SQL Server using JDBC driver

I have an application where I want to define the default number of rows to prefetch for a connection, using for ... the SQL Server JDBC driver? See Question&Answers more detail:os...

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

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3.6k views

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java - javax.el.PropertyNotWritableException: /index.xhtml @29,118 value="": Illegal Syntax for Set Operation

I want to create a login screen with localization option to translate the name and when i change from the default English ... :818) ... 38 more See Question&Answers more detail:os...

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

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