Recent questions tagged Java

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java - Elasticsearch - NoNodeAvailableException

I get the following error when trying to connect to Elasticsearch 2 using the Java API for ES 2. ... .execute(ActionRequestBuilder.java:59) 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 - If-Modified-Since Date Format

I am writing a server and I would like to check for "If-Modified-Since: " header. Since there are so many ... format that I should check for 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 Spring's JdbcTemplate to connect to a simple MySql database?

I am trying to use Spring's JdbcTemplate Class to connect to a simple MySql database based on this tutorial ... dirfferent way? Any suggestions? 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 Marshalling and Generics

I am trying to use JAXB's introspection to marshall and unmashall some existing domain objects marked up with JAXB ... with non-generic fields? 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 - Error while Importing public certificate to a keystore

I have a public certificate from a CA. I want to create a Java SSL connection using this certificate. I ... -cert.pem -keystore keystore.jks 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 - Set the size of a JSlider thumb

How can the size of the thumb be configured for a JSlider? With the defaults, and a range for the JSlider ... a native Windows 7 application: 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 Optional.ofNullable() be used for null check?

Which null-check is preferable? Optional.ofNullable(port).ifPresent(settings::setPort); or if (port != null) { settings.setPort(port); } 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 - Parsing an XML file with a DTD schema on a relative path

I have the following java code: DocumentBuilder db=DocumentBuilderFactory.newInstance().newDocumentBuilder(); Document doc ... appropriate DTD? 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 GSON to parse json object vs json array

I have a JSON that is either a single object or an array of the same object. Is there a way to parse this data ... "variable2": "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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java - Jackson unable to load JDK7 types on Android

I use Jackson 2.8.2 in my Android app to deserialize JSON. The deserialization itself works, however, I can ... missing types to my build? 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 HttpClient with multithreaded operation?

I've to do an application that performs a Login POST request in a certain host, then navigates some pages, finds ... it can be used to operate. 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 - Multiple SparkContext detected in the same JVM

according my last question I have to define the Multiple SparkContext for my unique JVM. I did it in the next ... already use the set-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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java - How to use two numbers as a Map key

I have two numbers and I want to use them together as a key in a Map. Currently, I'm concatenating their string ... keys. Who has a good idea? 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 rethrow exception as @ResponseStatus-annotated exception in Spring @ExceptionHandler?

I have made exception, that I'm throwing always when I want a 404 page: @ResponseStatus( value = ... ( HttpServletResponse.SC_NOT_FOUND ); } 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 an Ant Javadoc class exclude two files?

I am documenting some Java webservices and the supporting datatypes. There are two services that I do not want ... set and get around 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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236 views

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java - How to get 2D array possible combinations

I have the following 2D array: String[M][] String[0] "1","2","3" String[1] "A", "B" . . . ... really don't know how to approach the problem. 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 - Populate JTable Using List

How will I populate a JTable with values from a List with an Object Type. My Code looks like this : ... my table considering these columns ? See Question&Answers more detail:os...

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

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316 views

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java - JAXB: unmarshalling xml with multiple names for the same element

I figure this will be easy for someone who really understands JAXB binding files... Basic Question How do you ... .xjb file save the day? See Question&Answers more detail:os...

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

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398 views

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java - Split string into 2 strings based on a delimiter

Does anybody know if there is a solid library based method to achieve the following. Say I have the string "name1 ... name3, name4"; 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 - Remove ASCII color codes

So, I'm having an issue. I'm catching some stuff from a Logger, And the output looks something like this: 11 ... color codes (or to parse them). See Question&Answers more detail:os...

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

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419 views

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java - JavaFx GridPane - how to center elements

I have a GridPane filled with 1-letter-labels. Here is an image: Here is the code: int charSpacing = 1; int ... ); Has anybody an idea? 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 - Do we need both @Transactional and @Modifying annotation in Spring?

I am still trying to wrap my head around how @Transactional works. I have @Transactional annotation on Service ... questions and examples here. See Question&Answers more detail:os...

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

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502 views

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java - How to get instance of javax.ws.rs.core.UriInfo

Is there any implementation of javax.ws.rs.core.UriInfo which I can use to create an instance quickly ... (@Context UriInfo uriInfo); See Question&Answers more detail:os...

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

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377 views

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java - Spring Boot with datasource when testing

I am using Spring Boot application and the auto cofiguration is enabled. The main Application file is marked as ... when executing test case ? See Question&Answers more detail:os...

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

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403 views

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java - How to pass args to JVM which runs tests with Gradle

I am a Gradle rookie and I am not sure whether Gradle will start the new JVM when it runs the test set. ... this error but failed to solve 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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716 views

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java - Heap Inspection Security Vulnerability

I have run my java app against the checkmarx tool for security vulnerability and it is constantly giving an issue ... I look for resolving 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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571 views

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java - Hibernate mapping exception - Could not determine type for:

Im trying to configure my entities but hibernate throws the following exception: org.hibernate.MappingException: Could not ... of 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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226 views

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java - Play Framework (2.1.3) doesn't run any tests

I have 4 test classes with an average of two test functions each. The first test is below and must be ... their execution that is not working. See Question&Answers more detail:os...

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

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