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i used JRebel for few days...but using eclipse Kepler version i did not feel much difference in program execution and Project build, i followed same procedure as they mentioned on their official website. Does JRebel really improve programming efficiency ?
I think this question might get closed as it is very generic but if it doesn't then I think JRebel does not speed up build time or execution but allows classes to be updated on the fly. This can negate the need for server restarts in web development and it is here where JRebel will save time (the time it takes to restart and redeploy an application once a class file is changed.
There is a nice video here
http://zeroturnaround.com/software/jrebel/
Hope this helps
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I'm using VSCode for java. If I want to be a java developer, can I use VsCode for future coding or I should change it (Eclipse, IntelliJ, NetBeans)?
VSCode support is improving for java, but it is not good as Eclipse yet. If you are looking for free software, then I recommend Eclipse. Paid version of Intellij is really good.
One suggestion is to learn your IDE well. Learn common tasks and use of debugger well.
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I am wondering about the efficiency of small Java applications. I would like to write a small screenshot application that sits in the taskbar tray. Since this application will be very small and always running, is it worth the overhead of having a JVM running in the background all the time? Thank you in advance for any help.
EDIT: Rephrasing question: Is this an example of something that would be better written in an application that could be run natively instead of Java which requires a JVM to run?
As said above, you have to know whether it is worth it.
If you want to minimize the memory footprint of your application have a look at the guide from Oracle:
Tuning For a Small Memory Footprint
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I am creating an android app that will use the database intensely and use a lot of Json to read the output from the database over the internet. I know that PHP is an interpreted language but would this cause an issue when creating an android app from a performance standpoint when you have many users? or would I be better off with Java/MySQL. I know both PHP and Java just thinking long term here.
PHP works fine with huge number of users. It definitely wins for rapid development and release. You can scale your servers when the need arises. Imo, use any language/framework you are most comfortable.
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It seems every other week Oracle releases an update for Java and I get this wonderful pop up:
Comparing the amount of updates Java releases to every other software installed on my computer, Java puts out more updates than the rest combined.
Is there a reason for this ? Or are they just trying to be the most updated platform ?
You can see all updates in the change log, for example for the Java 8 Runtime it's available here: http://www.oracle.com/technetwork/java/javase/8all-relnotes-2226344.html
Obviously they aren't fixing bugs for kicks. It's so that there are less errors in the software.
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but of strange question here, but i have an existing windows product developed with .net framework and i want to create an equivalent for java - i don't want to use mono
Java will actually execute on every platform that has a JVm, anyway to lock this down?
I don't want it to be runnable on windows for example.
With regards to mono, i have nothing against it but Java seems to have more compatible libraries. Anyone have any comments on this?
You can use System.getProperty("os.name")to detect the operating system in the main method, then exit the application if it's not what you expect.