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What is the difference between ZoneOffset.UTC and ZoneId.of(“UTC”)?

Why does ZonedDateTime now = ZonedDateTime.now(); System.out.println(now.withZoneSameInstant(ZoneOffset.UTC) .equals(now.withZoneSameInstant(ZoneId.of("UTC")))); print out false? I would expect the both ZonedDateTime instances to be equal. 1 Answer ...

June 4, 2022
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Java, Programming

IT Nursery

Difference between JVM and HotSpot?

What exactly is HotSpot and how does it relate to JVM and OpenJDK? Is it a library? What exactly does it do? Also, ...

June 4, 2022
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Java, Programming

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What does JVM flag CMSClassUnloadingEnabled actually do?

I cannot for the life of me find a definition of what the Java VM flag CMSClassUnloadingEnabled actually does, other than some very ...

June 4, 2022
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Java, Programming

IT Nursery

Why invoke Thread.currentThread.interrupt() in a catch InterruptException block?

Why invoke the method Thread.currentThread.interrupt() in the catch block? 5 Answers 5

June 4, 2022
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Java, Programming

IT Nursery

Java 7 language features with Android

Just wondering if anyone has tried using new Java 7 language features with Android? I know that Android reads the bytecode that Java ...

June 4, 2022
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Java, Programming

IT Nursery

How to return multiple objects from a Java method?

I want to return two objects from a Java method and was wondering what could be a good way of doing so? The ...

June 4, 2022
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Java, Programming

IT Nursery

Java enum – why use toString instead of name

If you look in the enum api at the method name() it says that: Returns the name of this enum constant, exactly as ...

June 4, 2022
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Java, Programming

IT Nursery

How to execute IN() SQL queries with Spring’s JDBCTemplate effectively?

I was wondering if there is a more elegant way to do IN() queries with Spring’s JDBCTemplate. Currently I do something like that: ...

June 4, 2022
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Java, Programming

IT Nursery

Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved

org.apache.maven.plugin.PluginResolutionException: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-resources-plugin:jar:2.5 at org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve(DefaultPluginDependenciesResolver.java:129) at org.eclipse.m2e.core.internal.project.registry.EclipsePluginDependenciesResolver.resolve(EclipsePluginDependenciesResolver.java:48) ...

June 4, 2022
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Java, Programming

IT Nursery

What’s wrong with using == to compare floats in Java?

According to this java.sun page == is the equality comparison operator for floating point numbers in Java. However, when I type this code: ...

June 4, 2022
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