Recent questions tagged JAVA

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java - How to add semicolon after method call when inside parameter list in IntelliJ IDEA?

I'm finally making the voyage back to IntelliJ via Eclipse. Currently my Eclipse is set up so that if I ... have to type the closing bracket. 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 - Finding all the common substrings of given two strings

I have come across a problem statement to find the all the common sub-strings between the given two sub-strings ... should I design my code? 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 - Sequence Diagram Reverse Engineering

I'm looking for a tool that will reverse engineer Java into a sequence diagram BUT also provides the ability to ... 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 to downsample images within PDF file?

Need a Java-based solution or, at the worst, command-line for Linux. I tried to use Ghostscript: gs -sDEVICE= ... got a lot of errors... 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 - Core difference between object oriented and object based language

I want to know what is the core difference between Object Oriented and Object based languages I have read ... known as object oriented language 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 way to upload multiple files from a browser

I'm working on a web application. There is one place where the user can upload files with the HTTP protocol. ... multiple files in a folder. 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 - COLLECT_SET() in Hive, keep duplicates?

Is there a way to keep the duplicates in a collected set in Hive, or simulate the sort of aggregate collection that ... Array<int>(7,4,7) 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 - Auto generate data schema from JPA annotated entity classes

I'm using JPA (Hibernate's implementation) to annotate entity classes to persist to a relational database (MySQL ... from the domain classes. 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 difference between a top-down web service and a bottom-up web service?

In Java, what is the difference between a top-down web service and a bottom-up web service? Also, what is the ... and a REST-ful web service? 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 CrudRepository exceptions

I have this Spring Data CrudRepository which handles the CRUD operations on a DB. @Repository public ... about CrudRepository exceptions? 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 - Jmap can't connect to make a dump

We have an open beta of an app which occasionally causes the heapspace to overflow. The JVM reacts by going on ... a java VM process/core! 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 - Get list of attributes of an object in an List

When there is an List<Person>, is there a possibility of getting List of all person.getName() out of that? ... .add(personList.getName()); } 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 - creating spring rest services without using spring boot

I've followed the Getting Started tutorial on spring.io for building REEST services https://spring.io/guides/gs/ ... is the correct procedure). 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 does threshold mean in Log4J?

I have a log4j properties something like below. Everything that is logged in TextProcessor.log is something above WARN level ... (%F:%L) - %m%n 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 is this not throwing a NullPointerException?

Nead clarification for following code: StringBuilder sample = new StringBuilder(); StringBuilder referToSample = sample; ... throwing one, why? See Question&Answers more detail:os...

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

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171 views

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java - Is it possible to get element from HashMap by its position?

How to retrieve an element from HashMap by its position, is it possible at all? 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 - SFTP Upload Download Exist and Move using Apache Commons VFS

I need a pure Apache Commons VFS solution/code/example for Uploading a local file to Remote Host Location ... the underlying JSCH library. 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 - JMS - Going from one to multiple consumers

I have a JMS client which is producing messages and sending over a JMS queue to its unique consumer. ... Any feedback is highly 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 - Automatically convert Style Sheets to inline style

Don't have to worry about linked style or hover style. I want to automatically convert files like this <html ... for reply and original message. 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 Spring in a standalone application

i am looking for samples or tutorials of using Spring in a standalone (desktop/swing) application, i ... web applications, please advise. 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 - Class Cast Exception when trying to unmarshall xml?

Trying to get past a class cast exception here: FooClass fooClass = (FooClass ) unmarshaller.unmarshal(inputStream); ... I am 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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java - Eclipse "cannot find the tag library descriptor" for custom tags (not JSTL!)

I have a Java EE project which build fine with Ant, deploys perfectly to JBoss, and runs without any trouble ... , with no helpful results. 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 Boot - Error creating bean with name 'dataSource' defined in class path resource

I have Spring Boot web application. It's centered around RESTful approach. All configuration seems in place but for ... one 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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java - How to close a spring ApplicationContext?

After my application finishes I want to close the spring context. The relevant code has an ApplicationContext reference ... find a close 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 - (String) or .toString()?

I have a method with an Object o parameter. In this method, I exactly know there is a String in "o" ... there is always a nonempty string. 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 sampling and profiling in jVisualVM

VisualVM has two separate tabs for sampling and profiling. What is the difference between sampling and profiling in VisualVM? 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 - Design Pattern problem involving N states and transitions between them

I have a problem at hand and I am not getting which design pattern to use. The problem goes as such: I ... legibly. Kindly help. Thanks a lot 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 - Understanding javap's output for the Constant Pool

When running javap on a very simple HelloWorld application I have some confusion on the output around the constant pool ... much to be desired. See Question&Answers more detail:os...

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

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