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Why do we use volatile keyword? [duplicate]
...imizing the while loop. That is where the volatile keyword plays its role. All you need to do is this,
volatile int some_int = 100; //note the 'volatile' qualifier now!
In other words, I would explain this as follows:
volatile tells the compiler that,
"Hey compiler, I'm volatile and, you
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IntelliJ does not show project folders
...for me. I had to "Add Content Root" on that screen. Then for some reason all the folders magically appeared.
– Lavamantis
Jun 25 '15 at 20:39
2
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Ball to Ball Collision - Detection and Handling
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To detect whether two balls collide, just check whether the distance between their centers is less than two times the radius. To do a perfectly elastic collision between the balls, you only need to worry about the component of the velocity that is ...
Light weight alternative to Hibernate? [closed]
...what a terrible name). It was much more work than Hibernate. Hibernate really saves a lot of SQL coding and helps with parent-child relationships. I also looked at a few ActiveRecord style ORM's for Java. None seemed mature or any easier than Hibernate. So, I'm going back to Hibernate.
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What is the difference between Spring, Struts, Hibernate, JavaServer Faces, Tapestry?
...ased presentation framework.
JavaServer Pages is a view technology used by all mentioned presentation framework for the view.
Tapestry is another component-based presentation framework.
So, to summarize:
Struts 2, JSF, Tapestry (and Wicket, Spring MVC, Stripes) are presentation frameworks. If yo...
what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
...s dfs instead.
hdfs dfs <args>
same as 2nd i.e would work for all the operations related to HDFS and is the recommended command instead of hadoop dfs
below is the list categorized as hdfs commands.
namenode|secondarynamenode|datanode|dfs|dfsadmin|fsck|balancer|fetchdt|oiv|dfsgroups
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When is .then(success, fail) considered an antipattern for promises?
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What's the difference?
The .then() call will return a promise that will be rejected in case the callback throws an error. This means, when your success logger fails, the error would be passed to the following .catch() callback, but not to the fail callback that...
How to use sidebar with the keyboard in Sublime Text 2 and 3?
...ut for "Focus Group 1", but if you want to focus the group which was originally focused, use Esc instead (see the unofficial docs). For example, if group 2 is focused, and you then focus the side bar, Esc will return the focus to group 2.
– TachyonVortex
Dec 16...
Delete topic in Kafka 0.8.1.1
...he easiest way to do that (if you don't care about up time) is to shutdown all your brokers, delete your logs for that topic and changing you ZK namespace.
– frank
Jun 18 '14 at 16:16
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Another Repeated column in mapping for entity error
Despite all of the others post, I can't find a solution for this error with GlassFish, on MacOSX, NetBeans 7.2.
8 Answers
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