Recent questions tagged JAVA

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java - How to configure dynamic properties while using spring boot?

I'm planning to use Spring Boot for my assignment. Its a typical server application with connection to ... integration with Spring. Thoughts? 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 compile multiple proto files in single command?

I have two proto files inside single directory and I am looking for a way to generate classes from those ... files together in single shot. 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 - Timeout on blocking read for 5000 MILLISECONDS in Spring WEBLUX

i wrote a test for Handler (spring weblux) test: @Test public void checkServicesHandlerTest(){ Request request = new ... to server all is ok. 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 - can anybody explain me difference between class level controller and method level controller..?

I am new to spring framework....while searching on google..I found few examples which has @RequestMapping annoted ... for request mapping ??? 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 - Read from file in eclipse

I'm trying to read from a text file to input data to my java program. However, eclipse continuosly gives me a ... scanner = new Scanner(file); 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 the performance of BufferedReader so much worse than BufferedInputStream?

I understand that using a BufferedReader (wrapping a FileReader) is going to be significantly slower than using ... or an alternative mechanism? 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 the application closing event

How to get to the application closing event? I want to get application to save all unsaved operations ... a SingleFrameAplication using Swing. 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 - Critical guava memory leak - Workaround needed

Is there any way to workaround the Google Guava r15 memory leak (link to the bug report) in the cache ... will never be restarted/redeployed) 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 data jpa limit pagesize, how to set to maxSize

I have one requirement is to search by pageable and non-pageable, and in my Java code, I use spring data jpa ... set the pageSize value to MAX ? 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 - Combine many Maven goals within a single one

Until now, I'm using the command mvn clean compile hibernate3:hbm2java to launch my program. Is there any way to ... mvn run or mvn myapp:run? 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 - Differences between unix and windows files

Am I correct in assuming that the only difference between "windows files" and "unix files" is the linebreak? We have ... can save a lot of pain 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 wire Interdependent beans in Spring?

I want to declare two beans and instantiate them using Spring dependency injection? <bean id="sessionFactory" ... property binding anywhere? 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 - Calling @Transactional methods from another thread (Runnable)

Is there any simple solution to save data into database using JPA in a new thread? My Spring based web ... taskResultDao.persist(result); } } 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 create a Spring 5 component index?

Spring Framework 5 apparently contains support for a "component index" which lives in META-INF/spring.components and ... point to work from) 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 - Returning multiple object types using hibernate using an inner join

I seem to be having some difficulty with a query in hibernate. I am performing an inner join on two ... much appreciated. 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 - Spring JdbcTemplate - Insert blob and return generated key

From the Spring JDBC documentation, I know how to insert a blob using JdbcTemplate final File blobIn = new File(" ... I could combine the two? 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 - ordering a hashset example?

I need an example on how to use a comparable class on a HashSet to get an ascending order. Let's say I have ... get hs to be in ascending order? 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 - Producing and consuming custom JSON Objects in Spring RESTful services

I have some JSON Objects that are more complex than the JSON representations of the java objects I have. I have ... not want to return POJOs. 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 - Technique to automatically check consistency of equals, hashCode, and compareTo?

I'm well aware of the contractual needs to make sure that hashCode is consistent with equals and that equals is ... and e2 of class C. 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 - ConcurrentHashMap with weak keys and identity hash?

How do I get a ConcurrentHashMap with weak keys and identity hashes in Java? I think Google Guava Collections can ... other options do I have? 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 happens when the JVM runs out of memory to allocate during run time?

After thinking for a long time of a generic way to pose this question (and failing to find one) I'm just ... ? D. is it undefined behavior? 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 Floating Action Button API 19 (KitKat)

I need to implement a floating action button, according to Google Design Guidelines, on my android application ... for external dependencies. 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 RestTemplate - async vs sync restTemplate

I wrote the following code to test the performance of both the sync RestTemplate and AsyncRestTemplate. I just ran ... call to be much faster? 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 - JDBC returning empty result set

I'm using JDBC for very simple database connectivity. I have created my connection/statement and executed a query. ... ) in a different project. 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 - Fragment without a view crashes on configuration change

I have an UI where I need a Fragment to be displayed (with a view) in landscape mode but ... .moveToState(FragmentManager.java:722) 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 switch on String compiles into two switches

I read JVM specification on compiling switches and became interested in how switch statement on String is compiled ... me plain lookupswitch. See Question&Answers more detail:os...

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

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320 views

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java - Troubleshoot slow compilation

What should I do to investigate and troubleshoot a slow compilation problem? My project has about 100 classes and ... time is back to normal. 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 - Month name in genitive (Polish locale) with Joda-Time DateTimeFormatter

I have LocalDate which contains date 2012-12-28 and I want to print it with localized month name (i.e. ... ) and it's backwards incompatible. See Question&Answers more detail:os...

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

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