Recent questions tagged Java

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java - Generics - Cannot add to a List with unbounded wildcard

I instantiate the following list: // I am just revising generics again and the following is just cursory code! List<? ... why can't I add 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 - Grammar inference library?

What are the best (or any) open source libraries for regular or context-free grammar inference from a set of ... grammar which they all satisfy. 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 - Transaction causing activity to recall Firebase Android

When I click my rate_btn to start this transaction function. It works fine but in the process it re-run my class ... ).toString(); } Any 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 - Spring AOP - Invoking advice from catch block

Purpose: Send an email to admin every time an exception occurs while executing business logic. Till now I ... solution accordingly. Best Regards 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 update JLabel in Swing?

I am trying to use Swing Timer and I wanted to start from a very simple program. I have a window with text ... new value stored in "myMessage"). 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 - JAXB xsi:type subclass unmarshalling not working

I'm following the instructions on using xsi:type from this oft-cited blog post: http://blog.bdoughan.com/2010/11 ... or am I missing some setup? 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 - Inject PersistenceContext with CDI

Currently, I'm using PersistenceContext to inject an EntityManager. The EM is injected perfectly. @Stateless public ... like it should? 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 - Packing embedded database in jar file

I've created a derby Embedded Database in my eclipse project, and it runs well on eclipse, but when packing the ... } Any help in this issue? 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 - Downloading a file using AJAX GET from Spring Service

I'm trying to implement a Service that automatically starts a download with the requested file. This is my AJAX ... Am I doing anything wrong? 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 - Jackson: Ignore whitespace in empty @XmlWrapperElement collection

Using Jackson and jackson-dataformat-xml 2.4.4, I'm trying to deserialize a XML document where a ... cleaner approach would be better. 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 use lambda expression in jrxml file?

I am trying to use lambda expression inside jrxml file to get values for my field. I imported appropriate classes ... be resolved to a variable See Question&Answers more detail:os...

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

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446 views

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java - How Get error messages of antlr parsing?

I wrote a grammar with antlr 4.4 like this : grammar CSV; file : row+ EOF ; row : value (Comma value)* ... of output window Can anyone help 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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256 views

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java - ClassWriter COMPUTE_FRAMES in ASM

I've been trying to understand how stack map frames work in Java by playing around with jumps in ASM. I ... a bug with ASM's ClassWriter? See Question&Answers more detail:os...

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

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657 views

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java - Lucene Porter Stemmer not public

How to use the Porter Stemmber class in Lucene 3.6.2? Here is what I have: import org.apache.lucene.analysis. ... to stem using Lucene in Java?? 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 - Dependency injection with autowire="constructor" when multiple constructors are present?

I have text editor class with below constructors public class TextEditor { private SpellChecker spellChecker; private ... to be called? See Question&Answers more detail:os...

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

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515 views

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java - What is the difference between an EAR file and a "WebSphere Enhanced EAR"?

Supposing that I have a standard EAR file (and the source files that were used to generated it,) what additional ... (via either Ant or Maven.) See Question&Answers more detail:os...

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

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607 views

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java - How do I set the JTable column and row color?

How do I set the JTable column and row color? See Question&Answers more detail:os...

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

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592 views

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java 8 - Comparator.nullsFirst with null-safe-comparator

I want to have a null-safe comparator, but it does not work: Comparator<Item> sort_high = (i1, i2)-> Double. ... (List.java:478) What is wrong? See Question&Answers more detail:os...

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

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375 views

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java - Run .jar through Windows shortcut passing arguments

Is it possible run .jar through Windows shortcut (.lnk) passing arguments? See Question&Answers more detail:os...

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

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474 views

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java - Sorting multiple arrays simultaneously

So i am making a program that needs to handle multiple arrays. Is there any way to sort all these arrays to reflect ... 0. How could 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 - How to pass arguments to javascript function call when using onClick in Thymeleaf

I have been calling my javascript function from Thymeleaf as below: th:onclick="'viewDocument('' + ${document. ... will be helpful. TIA. See Question&Answers more detail:os...

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

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486 views

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java - Load resource from class's own JAR file

When using Class.getResource() and supplying a rather common resource name, like "license.html", Java may load ... other JARs on the CLASSPATH? See Question&Answers more detail:os...

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

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639 views

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java - getClass().getResource("/") returns null in command line

I'm trying to read a file in my maven project at /src/main/resources/file.txt. I'm using URL url=this.getClass ... Jar. Where am I going wrong ? See Question&Answers more detail:os...

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

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328 views

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java - String.format() to fill a string?

I need to fill a String to a certain length with dashes, like: cow-----8 cow-----9 cow----10 ... thing more cleanly with string format? 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 - After HTTP GET request, the resulting string is cut-off - content has been consumed

I'm making a http get request like this: try { HttpClient client = new DefaultHttpClient(); String getURL ... .NativeStart.main(Native Method) See Question&Answers more detail:os...

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

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378 views

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java - How to access duplicate column names with JSTL sql:query?

For some reason, this <sql:query dataSource="${ds}" sql="select user.id, user.name as userName, city, state, ... m using JSTL jstl-1.2.2. See Question&Answers more detail:os...

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

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425 views

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java - format date from 14 aug to YYYYMMDD

Change the date 14 aug 2011 to the format 20110814 .. how can i do that in java ? Here 14aug is a string ... String date="14aug"; See Question&Answers more detail:os...

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

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535 views

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java - JSON URL from StackExchange API returning jibberish?

I have a feeling I'm doing something wrong here, but I'm not quite sure if I'm missing a step, or am just ... 't working. What am I doing wrong? See Question&Answers more detail:os...

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

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