Recent questions tagged Java

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java - Is it possible to connect to spring boot embedded ActiveMQ instance from another application(started in separate process)?

I've read several examples about jms support in spring boot. and usually sender, receiver and active-mq(actually ... activemq) Is it posiible? 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 - FileOutputStream set encoding to utf-8

a want to set a file to utf-8 the FileOutputStream takes just two parameter my code is PrintWriter kitaba1 = ... (moarif1); kitaba1.close(); 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 Post JSON array using Retrofit 2

I need to post an JSON object using Retrofit 2. My JSON object is { "logTime" : "", "datas" : [ { " ... code. Please help me. Thanks in advance. 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 occurred during initialization of boot layer

I followed the steps to create the HelloWorld example but it doesn't run. It gives the following error: Error ... advise how to solve 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 - Illegal static interface method call

Java-8 allows define static methods inside interface, but restricts it invocation by only interface name: 9.4: An ... ? What does it break? 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 - ProcessBuilder vs Runtime.exec()

I'm trying to create a frontend app in Java to handle batch SVG conversions using Inkscape's command line feature ... on which method is 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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java - Removing code duplication

I am trying to create a little functional programming library for Java (just to scratch my own itch). While defining the ... B apply(A a); } 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 JMeter pool HTTP connections?

I know when using the built-in Java HTTP client in a JMeter HTTP Request sampler connections may or may not be ... set the size of the pool? 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 - JavaFX on ARM running jdk1.8.0

I know that Oracle removed JavaFX in 8u33, but I'm wondering why I can't use JavaFX with jdk1.8.0? I got it ... .jar I still get the same 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 - Why should the value for an annotation attribute be a constant expression?

I am having the following piece of code @UIUnitTimeout(8*60*1000) // works @UIUnitTimeout(TimeUnit.MINUTES. ... a logical reasoning behind? 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 - Initialize final variable within constructor in another method

I have a problem which isn't really that big, but still gives me some thought as to how Java ... constructors, for cleanliness's sake. 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 understand the "non-fair" mode of ReentrantReadWriteLock?

ReentrantReadWriteLock has a fair and non-fair(default) mode, but the document is so hard for me to understand it. ... chance to get the lock? 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 - TimeZone.getTimeZone("CST") returns GMT

I'm converting time from CST to local time but getTimeZone doesn't seem to work properly. String cstTime = "2013-06-21 ... "CST" can't work... 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 execute an authenticated AJAX request without resetting the tomcat's session timeout?

I've got an existing Grails Web application that is in production and has a 30 minute session timeout. ... from extending the session timeout? 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 create table with spring data cassandara?

I have created my own repository like that: public interface MyRepository extends TypedIdCassandraRepository<MyEntity, String> { ... etc. :-) 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 - A dozer map exception related to Spring boot devtools

I have encountered a very strange exception, and I don't know how to find the reason. Business ... application, without above exception. 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 - Configure org.apache.log4j.ConsoleAppender with custom classloader

I have a java class which creates a custom classloader based on javassist class loader on start up and then run ... ? Thanks in advance, Avner 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 - Is there a Swing component for Google Maps?

I would like to have support for Google Maps in my Java Swing desktop application. Is there an Google Maps ... maps i.e. like OpenStreetMaps. 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 - Making part of a string bold in textview

Why is the following code not working? It works in a Toast but not in a TextView. boldName doesn't show up as bold ... + " as your contact."); 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 - partitioning an float array into similar segments (clustering)

I have an array of floats like this: [1.91, 2.87, 3.61, 10.91, 11.91, 12.82, 100.73, ... theoretical justification will be very helpful 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 - Closing a nested stream closes its parent streams too?

OutputStream fos; OutputStream bos; OutputStream zos; try { fos = new FileOutputStream(anyFile); bos = new ... to close them manually? 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 run all modified JUnit test classes?

I have an IntelliJ project, versioned in git. How can I run all JUnit test classes, that I have modified since my last commit? 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 package executable JAR file into EXE

I would like to deploy my final build as an EXE with an application Icon. What is the best way to do this? What is the common practice? 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 - Hibernate UUID as UUID type

Trying to use a UUID as my id for PostgreSQL and H2, the current exceptions are for H2 java.lang. ... m fairly new to H2). 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 Kafka order windowed messages based on their value

I'm trying to find a way to re-order messages within a topic partition and send ordered messages to a new ... and send them to another topic? 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 me - Running J2me apps on Android phones

Is it possible to run J2ME apps on Android phones? If so, what is the installation procedure? Otherwise, is it ... doesn't seem to work.) 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 - hibernate insert to a collection causes a delete then all the items in the collection to be inserted again

I have a many to may relationship CohortGroup and Employee. Any time I insert an Employee into the CohortGroup ... to all that are helping. 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 a class customization to resolve conflict when generating jaxb object from xsd

When I run the xjc -d src/ -p com.test IFC2X3.xsd command on following xsd it gives the conflict. . ... as suggested Use a class customization See Question&Answers more detail:os...

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

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