Recent questions tagged Java

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java - Lightest Database to be packed with an application

I am developing a Java Desktop Application and want a light database that can be used with Hibernate and that ... has dialect for Derby? 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 - Advantages of using Hibernate Callback?

I am not able to understand advantages of using Hibernate Callback method, are there any advantages or specific ... right assumptions to make? 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 get height of webview content once rendered

I'm trying to get the height of a webview once it has been rendered. It always returns null, I've ... solutions it would be greatly 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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java - How do I set the path to my Cucumber features using cucumber-junit?

I try to build my first executable specifications with Java and Maven. I created a simple project with this ... to understand the whole 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 - How to deserialize a JSON array of objects using Gson library?

I am facing an issue while I am trying to deserialize a JSON array of objects using the Gson library. An ... deserialize such a JSON response? 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 we call a stored procedure with Hibernate and JPA?

How can we call a stored procedure using Hibernate or JPA? 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 - string.matches(".*") returns false

In my program, I have a string (obtained from an external library) which doesn't match any regular ... return extractor.getTextFromPage(1); 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 do I get @ParametersAreNonnullByDefault to work?

I've made several attempts at getting package annotation @ParametersAreNonnullByDefault to work for me in a maven project ... enforce it for 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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java - What's the difference between DataOutputStream and ObjectOutputStream?

I'm learning about socket programming in Java. I've seen client/server app examples with some using ... there a performance difference? 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 - regular expression to replace two (or more) consecutive characters by only one?

In java, which regular expression can be used to replace these, for example: before: aaabbb after: ab before: 14442345 after: 142345 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 - Maven: NoClassDefFoundError in the main thread

I am currently building a little Apache-Mina Server app. I am using Maven to build it. When i try to run the ... > What am I doing wrong 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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java - Apache Commons FTPClient Hanging

We are using the following Apache Commons Net FTP code to connect to an FTP server, poll some directories for ... Related to the FTP server? 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 - What is the best way to update the entity in JPA

I am doing some CRUD operations using JPA. For updating an object which is the right way to do? Through update ... right way? Please guide 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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Disclaimer: this is not about this case (while error sounds as same): class inherits unrelated defaults for spliterator ... Object,I1,I2 1 error 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 map collections in Dozer

I'd like to do something like: ArrayList<CustomObject> objects = new ArrayList<CustomObject>(); ... DozerBeanMapper ... without any luck... 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 an Anonymous class can't implement multiple interfaces directly? Simply because of syntax or there is another reason?

In there an internal issue why java anonymous classes cannot implement and subclass at the same time? Or is it just because the syntax? See Question&Answers more detail:os...

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

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624 views

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java - Example keycloak spring-boot app fails to find bean KeycloakSpringBootConfigResolver

I'm trying to run example app from: https://github.com/keycloak/keycloak-quickstarts/tree/latest/app-springboot I ... finished with exit code 1 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 b/w <context-param> and <init-param>

DD elements <context-param> and <init-param> both can be retrieved by the getInitParameter() method, in the servlet ... param> and <init-param>? 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 - Does empty synchronized(this){} have any meaning to memory visibility between threads?

I read this in an upvoted comment on StackOverflow: But if you want to be safe, you can add simple synchronized ... (stale values in first call) 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 - Type safety: Unchecked cast from Object to ArrayList<MyVariable>

Here is a part of a program that sends an ArrayList from a server to a client. I want to remove the warning about ... ")". ;) Thank you, Luis 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 - Register a Stream "completion" hook

Using the Java 8 Stream API, I would like to register a "completion hook", along the lines of: Stream<String> ... this with existing JDK 8 API? 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 - Ignore specific nodes/attributes while comparing two JSONs

I want to compare two JSON strings which is a huge hierarchy and want to know where they differ in values. ... other ways are also welcome. See Question&Answers more detail:os...

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

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237 views

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java - Is it possible to have multiple rows with jsf h:datatable

With h:datatable we can display data as follows Jems tom chirs harry but can I display the same as shown below ... chris 4. harry Ragards, Abhi See Question&Answers more detail:os...

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

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376 views

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java - JSP and Servlet life cycle method

If JSP turns into a Servlet why there are different life cycle methods for example jspInit() and init() ? 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 - Who notifies the Thread when it finishes?

I have one question regarding wait/notify based threads interaction. The output of the below code is Im. How output can ... .println("Im"); } } See Question&Answers more detail:os...

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

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315 views

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java - Read Input until control+d

I want to prompt the user to begin entering characters and I want them to be able to enter characters as ... or something. 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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483 views

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java - javafx transparent window background with decorations

I'm having a hard time figuring out how to make a transparent background for an application window in javafx. ... this be done on windows? See Question&Answers more detail:os...

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

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234 views

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java - How would one create a custom JVM launcher?

There has been a history of "how to launch an application without a main method" questions, most stating something ... to find such a thing. See Question&Answers more detail:os...

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

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