Recent questions tagged Java

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java - Hibernate query for selecting multiple values

In hibernate I can do following Query q = session.createQuery("from Employee as e); List<Employee> emps = q. ... will be the structure of list? 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 - Area of intersection between circle and rectangle

I'm looking for a fast way to determine the area of intersection between a rectangle and a circle (I need ... have 2 points of intersection. 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 - Custom Authentication Provider Not Being Called

I'm trying to setup a customer AuthenticationProvider with Spring Security but not having much luck getting it working ... I should be checking? 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 delete native query throwing exception

I have a User entity and a Role entity. The relationship is defined like this: @OneToMany @JoinTable(name="USER_ROLES" ... I'm 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 - Annotation Processor, generating a compiler error

I'm trying to create a custom annotation that, for example, ensures that a field or method is both public ... generates a compile time 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 parse 2013-03-13T20:59:31+0000 date string to Date

How to parse this format date string 2013-03-13T20:59:31+0000 to Date object? I'm trying on this way but it ... ; Date result = df.parse(time); 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 - Adding certificate chain to p12(pfx) certificate

I have aplication in java and cxf which connects to WebServices with client certificate. I got certificates form ... or other tool? Bary 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 MVC web app: application context starts twice

I'm working on a Spring MVC REST API. Everything works fine, which is great, but I noticed from the ... </listener-class> </listener> 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 schedule a task in Tomcat

I have a web application deployed in Tomcat. I have a set of code in it, that checks database for certain ... how to schedule this in Tomcat. 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's JdbcTemplate and Transactions

When using JdbcTemplate, do I need to explicitly configure transactions? My code layout looks like the following: ... .updateXXX(...); 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 configure custom jsessionid for embedded server

I want to configure my servlet context, such as setting a custom jsessionId key (see Changing cookie ... manipulate the servlet context. 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 CopyOnWriteArrayList and synchronizedList

As per my understanding concurrent collection classes preferred over synchronized collections because the concurrent collection ... ; } } 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 use of creating a class inside interface and interface inside class

I want to know what is the need of placing a class inside interface and an interface inside class? class A { interface ... D { class E {} } 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 - Setting the JVM via the command line on Windows

Is it possible to specify the JVM to use when you call "java jar jar_name.jar" . I have two JVM ... all ready running. Kind Regards Stephen 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 clear all Hibernate cache (ehcache) using Spring?

I am using 2nd level cache and query cache. May I know how to programmatically clear all caches ? 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: FXML: How to make the child to extend its size to fit the parent pane?

I have managed to load a child fxml(sub UI) under a parent fxml (mainMenu UI). I have created an ... " AnchorPane of the MainMenu parent. 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 BigDecimal natural ordering inconsistent with equals?

From the Javadoc for BigDecimal: Note: care should be exercised if BigDecimal objects are used as keys in ... reason behind this inconsistency? 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 - Ant run command with pipes

I must to implement command : java -jar test.jar page.xml | mysql -u user -p base in ant. So i Have tried with ... to | So, that's 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 - Time Complexity of HashMap methods

Since i'm working around time complexity, i've been searching through the oracle Java class library for the time ... in the HashMap. 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 - How to change the text color of SlidingTabLayout?

I made an application which use the ActionBarCompat I created the tabs using the SlidingTabLayout class. the class is ... text ? 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 - Classloader issues - How to determine which library versions (jar-files) are loaded

I've just solved another *I-though-I-was-using-this-version-of-a-library-but-apparently-my-app-server-has-already- ... writing it to a log 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 does giving explicit type arguments to a non-generic method or constructor compile?

When instantiating ArrayLists I am used to seeing code like this ArrayList<Type> arr = new ArrayList<Type> ... operations" compile warning? 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 find length of a string array?

I am having a problem with the following lines where car is a String array which has not been initialized/has ... What is a possible solution? 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 - Generating header/footer with flying saucer (xHTMLRenderer) and iText

I realize this question has been asked before (I looked at all the solutions and tried them all) but I am still trying ... R8 and/or iText 2.0.8 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 BottomSheetDialogFragment does not expand completely

I have the following test bottom sheet implementation. When I set the peekHeight to a value less than 500, it works ... , container, false); } } 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 in JavaMail : PKIX path building failed unable to find valid certification path to requested target

I am trying to build an email client app in android and right now i want to configure the javaMail part ... mail server Any suggestions? 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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317 views

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java - How to measure service methods using spring boot 2 and micrometer

I started my first project on Spring Boot 2 (RC1). Thanks to the already good documentation this has not been to hard ... () { ...; } } See Question&Answers more detail:os...

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

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252 views

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java - Android: Why can't I create a handler in new thread

I had a problem creating a handler in new thread. This is my code: @Override protected void onCreate(Bundle ... Thread.run(Thread.java:856) See Question&Answers more detail:os...

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

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