Recent questions tagged java

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java - eclipse memory analyzer sees small part (363,2MB) of entire heap dump (8GB)

I was trying to investigate java.lang.OutOfMemoryError: GC limit exceeded which occurs at high load of our web ... in MAT: overview unreachable See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I determine which monitor a Swing mouse event occurs in?

I have a Java MouseListener on a component to detect mouse presses. How can I tell which monitor the mouse ... the entire window is visible. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Strange String.split(" ") behavior

I have a .txt text file, containing some lines.. I load the contain using the RequestBuilder object, and ... appreciated. Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Guice module with type parameters

I spent some time wondering if it is possible to write a guice module which itself is parametrized with type ... . Regards, ?ukasz Osipiuk See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Hiding classes in a jar file

Is it really impossible to hide some classes in a jar file? I wanted not to allow direct instantiation of ... second one will be referenced) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - IOException while reading from InputStream

I'm running into a strange problem while reading from an InputStream on the Android platform. I'm not sure ... Any help is appreciated! Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Create a "Command" Console

I have a bit of an unusual question: How can I create a "Command Console" using Swing? What I want to have ... it doesn't answer my question. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I add localization to JFileChooser for a locale that is not supported by default?

The list of supported locales for User Interface Translation does not have all the languages I need to support ... languages for a JFileChooser? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Solr Composite Unique key from existing fields in schema

I have an index named LocationIndex in solr with fields as follows: <fields> <field name="solr_id" type=" ... where should I make changes? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to put/get values into/from Nested HashMap

I want to create a nested HashMap that will take two keys of type float and give out value of type Integer. ... . Any help would be appreciated! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to mock InitialContext constructor in unit testing

when I try to mock following method(Method is using remote EJB call for business logic) for the Junit test, ... in original method(someMethod). See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to combine scatter chart with line chart to show line of regression? JavaFX

I've created a scatter chart with two sets of data; the first set is the actual data (x = year and y = ... do or is it just impossible? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Null Object in HashSet implementation

In the Java API, the implementation of HashSet is using an Object as a value for the inside HashMap, // Dummy ... value, so why is this needed? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Displaying objects from a Set collection in Datatable JSF does not work

Any reason why a such asSet<MyObject> objects = new HashSet<MyObject>(); shouldn't work in the JSF Datatable? It works with List. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - SpringBoot 1.5.x + Security + OAuth2

I have a Spring Boot REST API with OAuth2 Security. Today I have upgraded my version of spring-boot-starter ... new BCryptPasswordEncoder(); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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272 views

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java - How to determine the delimiter in CSV file

I have a scenario at which i have to parse CSV files from different sources, the parsing code is very ... character before parsing the file See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get the keys with the biggest values from a hashmap?

I have a HashMap defined like this... HashMap<String,Integer> uniqueNames = new HashMap<String,Integer>(); ... please offer some suggestions. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - package does not exist error!

I have a directory structure like com/example/web under the root directory which contains a java file Bear.java. I ... Can give me some advice? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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228 views

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java - How to sign a custom JCE security provider

Sun's PKCS11 JCE security provider is lacking some functionality we need. So I wrote an enhanced version of it using ... make it work with JCE? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to log out automatically with Spring Security

I have a spring web application and I did user authentication using Spring security. Everything works well. Log ... redirected to /login?logout See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java incorrect timezone

I have an instance of Java which seems to be using a completely incorrect time zone. Instead of using the Australia ... Java version is 1.6.0_06 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JAXB Mapping to JSON

I have written a JAX-RS (Jersey) REST Service, which accepts XML messages of ONIX XML format. Generally, I ... the JAXB object and visa vera? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Freemarker: How to iterate through the Map using enums as keys

The following code does not work because Freemarker seems to cast the value of the expression inside [] to String and ... as a key. Thank you. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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217 views

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java - Determine which thread owns a monitor

Is there a way to tell, for a Java object, which Thread (or null) currently owns its monitor? Or at least ... if the current thread owns it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Hibernate: how to use CONCAT and GROUP_CONCAT

How can I use CONCAT() and GROUP_CONCAT() in HQL queries? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - No message body writer has been found for response class ArrayList

While I am trying to return List its throwing No message body writer has been found for response class ArrayList. ... help me. Thanks in advance See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring boot cannot find index.html under webapp folder

I read the following documentation from spring.io and it said By default Spring Boot will serve static content from a ... -version></span></div> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - javac "cannot find symbol" error with command line

I have two classes Owning and OwningAccessor. The files are in the same directory. public class Owning { String ... fine under eclipse IDE. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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