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StackOverflow Point Latest Questions

Alex Hales
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Alex HalesTeacher
Asked: October 3, 2022In: Java, Performance, premature-optimization

performance – Are Java static calls more or less expensive than non-static calls?

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[ad_1] Four years later… Okay, in the hope of settling this question once and forever, I have written a benchmark which shows how the different kinds of calls (virtual, non-virtual, static) compare to each other. I ran it on ideone, ...

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Alex Hales
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Alex HalesTeacher
Asked: October 3, 2022In: Hibernate, Java, jboss, jpa, resteasy

java – PersistenceContext EntityManager injection NullPointerException

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[ad_1] I have a war containing the following: META-INF/MANIFEST.MF WEB-INF/classes/META-INF/persistence.xml WEB-INF/classes/com/test/service/TestServlet.class WEB-INF/classes/com/test/service/TestEntity.class WEB-INF/classes/jndi.properties WEB-INF/classes/postgresql-ds.xml WEB-INF/jboss-web.xml WEB-INF/web.xml index.jsp persistence.xml: <?xml version="1.0" encoding="UTF-8"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0"> <persistence-unit name="test"> <provider>org.hibernate.ejb.HibernatePersistence</provider> ...

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Alex Hales
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Alex HalesTeacher
Asked: October 2, 2022In: Eclipse, Java, m2e, m2eclipse, Maven

java – get rid of POM not found warning for org.eclipse.m2e:lifecycle-mapping

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[ad_1] With intent to get m2e 1.0 working correctly I have had to specify the lifecycle mapping: <pluginManagement> <plugins> ...

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Alex Hales
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Alex HalesTeacher
Asked: October 2, 2022In: Java, mocking, testing, Unit Testing, unit-testing

unit testing – Are there any Fake File System frameworks for Java?

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[ad_1] i’m not sure about specific frameworks, but a general approach in terms of OOP would be to write some abstracted layers on top of any file access code (interfaces galore!) and perhaps a facade to ease use ...

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Alex Hales
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Alex HalesTeacher
Asked: October 2, 2022In: Java, jmenuitem, shortcut, Swing

java – How do you make menu item (JMenuItem) shortcut?

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[ad_1] java – How do you make menu item (JMenuItem) shortcut? – Stack Overflow ...

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Alex Hales
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Alex HalesTeacher
Asked: October 2, 2022In: Android, android-intent, android-service, Java, Networking

java – Internet listener Android example

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[ad_1] The code from Chirag Raval above certainly works. The trouble is that the listener will get invoked even when the application is not running in foreground. IMHO, the better approach is to register / unregister the receiver ...

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Sorry it's a private question.

Alex Hales
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Alex HalesTeacher
Asked: October 2, 2022In: Eclipse, Java, java.library.path, path

How to add native library to “java.library.path” with Eclipse launch (instead of overriding it)

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[ad_1] How to add native library to “java.library.path” with Eclipse launch (instead of overriding it) – Stack Overflow

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Sorry it's a private question.

Alex Hales
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Alex HalesTeacher
Asked: October 2, 2022In: Hibernate, hql, in-clause, Java

java – passing list to IN clause in HQL or SQL?

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[ad_1] I get List<Strings> by executing a query. This must be passed to another query of IN clause values. How to pass them in HQL? We can convert List to Array and can pass it, that’s not a problem. Finally, ...

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