Have a scenario where i need to compile my project with jdk 1.5 but run it with jre 1.6. I can't find a way to switch the jre that is used when running my program. I read something about execution profiles in an earlier version of netbeans, but 6.8 doesn't seem to support this. Any ideas?
Seems easy to do in eclipse.
You go to project-> properties - > sources ->binary source format and you pick your jdk 1.5 in your case. In libraries you can pick Java Platform
Related
I am downloading it from here: http://eclipse-cs.sourceforge.net/update/
- Checkstyle version 6.2.0.20150
My eclipse build is: 4.3.2
I have tried downloading it from both the marketplace and the website above, though both ways do not create a "checkstyle" link in the preferences window.
Anyone have any idea what's going on here?
I've also encountered the mentioned problem. But the reason is simple. In the release notes we can read:
Please note that as of this version Java 7 is the minimum runtime
environment supported. This requires you to run Eclipse on a Java 7
(or newer) JVM in order to use this plugin version.
Checkstyle since version 6.2.0 (released in January 2015) needs Java 7 as the minimum runtime environment.
So in order to run Eclipse on a Java 7, you can for example edit eclipse.ini file and add at the beginning something like:
-vm
C:\Program Files\Java\jdk1.7.0_75\bin\javaw.exe
Your exact path to javaw.exe could be different, of course. Alternatively make JDK 7 (or newer) as the default JVM for your system.
I have upgraded to Java7 recently.
I had my install4j Project file in Java6.
Now in the Install4j IDE, I go to Media wizard and download 1.7 JRE's and select them for Windows. (I have window 7 64 bit.)
But When I go the Installer tab in IDE , where for some of the screens I have my custom code which is compiled in Java7.
It gives an error for the IDE java version lower than the compiled version(for those class files).
The Common Location where is the JRE for 1.6 was downloaded C:\Program Files\Common Files\i4j_jres
But the JREs for 1.7 somehow are never downloaded in the common location.
How Do I make the Install4j IDE to upgrade to Java7 instead of Java6.
Thanks
Sony
We had the same problem as you, so we just swapped out install4j's built-in JRE with the one we used to compile our custom code.
i.e. - replace "C:\Program Files\install4j5\jre" with the jre you use to build your custom actions.
Under General Settings->Java version, change the minimum version to 1.7
I'm not sure if this question has been answered in full or if my title is descriptive enough given my situation, but I've been asked to convert a project from being built with Ant to Maven. That part isn't too bad, but I've been told that this application was designed specifically for the JRE version 1.5 rather than the JRE 6 everything else I've been dealing with uses. Now, I'm incredibly new to Eclipse and Java themselves, so I was a bit confused when I was asked to tell either Eclipse or Maven to build this particular project using the JRE 1.5 instead. I have it installed, I believe, and I've tried to follow the steps outlined here: ( Eclipse: Build and conform to different JRE versions ), but I've run into a snag.
I've managed to change the Run Configuration to use the Alternate JRE jre1.5.0_11. When I then tried to build it, the console spat out the following:
[ERROR] Unable to locate the Javac Compiler in:
[ERROR] C:\Program Files (x86)\Java\jre1.5.0_11\..\lib\tools.jar
[ERROR] Please ensure you are using JDK 1.4 or above and
[ERROR] not a JRE (the com.sun.tools.javac.Main class is required).
[ERROR] In most cases you can change the location of your Java
[ERROR] installation by setting the JAVA_HOME environment variable.
I assume this means that I need to be using the JDK 1.5 in order to use the JRE 1.5, since I'm currently working with JDK 1.6. Now, is there a way to install the JDK 1.5 so that this project can use it? My JAVA_HOME variable currently points to the JDK 1.6, and I would like it to stay that way... Is there a way to be able to use both and simply tell the project (or Eclipse or Maven... however it works) to use a specific version of the JDK?
Yes, this is possible. You can install as many different versions of Java — JREs and JDKs — as you like, and tell Eclipse which one to use for each project.
First step is to install the JDK 1.5 on your machine (JDK is short for 'Java [SE] Development Kit', look for that on the Oracle download site). The JDK includes a JRE, so to make life easier you can usually just install the JDK and not worry about the JRE/JDK distinction.
Second step is to tell Eclipse about the new JDK. Go to Preferences... then Java > Installed JREs. Click the Search... button and Eclipse should find your newly installed JDK 1.5 and add it to the list.
Final step is to allocate that JDK 1.5 to your project. Bring up the Properties menu for your project (right-click it). Then set these values:
Java Compiler tab
Tick Enable project specific settings
Set Compiler Compliance level to 1.5
Java Build Path tab, Libraries subtab
Find the JRE System Library item, click Edit...
Set Alternate JRE to your newly installed JDK 1.5
It looks like you are using JRE 1.5 rather than JDK 1.5
Make sure you download the JDK 1.5 and your issue should go away. You can set the default JDK in the preferences, search for 'jre'.
Projects can also define their specific jre
Get JDK 1.5 from Here http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase5-419410.html
I have downloaded eclipse 3.1.2 to be able to make use of a particular library (Indus - http://indus.projects.cis.ksu.edu/). Under the 'Create a java project' dialog, the JDK section is automatically set to 1.4, which is fine. However, I don't have jdk 1.4 installed on my machine. Is it included with Eclipse 3.1.2? Also when I right click on the project and go to 'Properties' and select 'Java build Path', the jre is set to jre 6. Should this not be a jre suitable for java 1.4? Could someone also explain to me exactly what the jre is and how it ties in with the jdk?
Related question
You should be able to find older jdk's or jre's (like here). If you compile the Eclipse project for a certain version, newer jre's should be able to run them too.
I see JRE all over the place, but i can not be sure which JDK is compiling my code. How do i find out?
You can still check/set which JDK version you want to compile to. If you go to Window->Preferences, then click "Java" from the menu on the left and then "Compiler". The first setting allows you to see which JDK version is being complied with.
I know this doesn't directly answer your question since JDK isn't actually compiling it, but hopefully it helps!
Actually Eclipse has its own compiler. You can develop java apps using only the JRE and Eclipse
You don't find JDK explicitly mentioned anywhere because way to point to a JDK is under the name of 'Installed JRE'. That is Window > Preferences > Java > Installed JREs. This is useful when using m2e plugin.
secondly apart from having it's own built in compiler, it is recommended to you install one of your own to support development of Java programs. Except below from eclipse wiki page :
If you intend to use Eclipse for Java development, then you should install a JDK