I have JDK11 and JADK8 both installed on my MacOS. I have changed the JDK default version to 1.8 to make sure GlassFish V5 can be run.
However, the change is not taken place at VSCode, and VSCode terminal keeps on showing JDK11 as JAVA version, which is preventing me from running GlassFish server though VSCode.
How can I fix this?
Thank you
Here you can choose wich version to install.
Edit : as mentionned here
VS Code does not have built-in support for Java projects. You need to install some Java extensions and configure them to specify the correct Java JDK version, which you can do by either setting the JAVA_HOME environment variable or by setting the java.home setting:
It depends on the value of JAVA_HOME environment variable. Check your JAVA_HOME path in the settings.json file.
If it shows Java11, set JAVA_HOME environment variable as per your requirement and restart VSCode. Check How to set JAVA_HOME in Mac permanently?.
Java extension needs jdk11 or recent version to support, so it's required to set jdk11 as java.home in vscode, but it's also achievable to specify other jdk version for project.
Open Command Palette and Search Java: Configure Java Runtime.
Choose JDK8 for Project JDKs.
Choose JDK11 or recent version as
Java Tooling Time.
Don't forget to reload window to make the change effective.
Detailed information please view official docs: Configure JDK
Related
It's not a duplicate. I would like to get current JRE version while program is executing.
To test result I've installed JDK 8.91 (without JRE 8.91 installation) and JRE 8.77. Also I've created JRE_HOME, JAVA_HOME variables, excluded Path variable with JDK folder.
My Tomcat uses JRE so I would like to get current JRE version before I will launch it. I found solution like:
System.getProperty("java.version")
After executing
System.out.println(System.getProperty("java.version"))
I get result 1.8.0_91 Instead of 1.8.0_77, which I wanted to get.
However, Oracle documentation gives the definition that this is JRE version.
Link:http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/System.html#getProperty%28java.lang.String%29
How can I fix it?
When you run a Java program, it always runs on a JRE (Java Runtime Environment). You cannot run a program on the JDK directly.
When you install Oracle's JDK, a JRE is included, you can find it in the jre directory in the JDK installation directory.
When you install Oracle's JDK, you get an option to install a "public JRE". This is a JRE that is installed separately from the JDK itself, and is used by browser plug-ins. You need this only if you want to be able to run Java applets in your browser.
I'm trying to set the IntelliJ IDEA JDK to version 1.8 (because it's the latest). When I navigate to System/Library/Frameworks/JavaVM.framework IntelliJ IDEA shows 1.6. When I type java -version it shows 1.8. I found that command under "Finding default JDK on OSX" https://www.java.com/en/download/help/version_manual.xml
I'm confused what versions of the JDK I have... and where they are located. Appreciate any help.
Yes, you can. You have JDK 1.6 and 1.8 installed on your computer. According to the Jetbrains website, all their products require Apple JDK 1.6 to be installed in order to run on Mac.
To make IntelliJ IDEA use JDK 1.8, you will need to edit /Applications/<Product>.app/Contents/Info.plist file and change JVMVersion from 1.6* to 1.8* :
<key>JVMVersion</key>
<string>1.8*</string>
To start off java will usually uninstall any version of the JDK when you get an update. Secondly if you want to check to see what version you are running I would go into what ever you are using to program and see what version you are compiling under (For example netbeans or eclipse). If it says 1.8 that is what you are running and same for 1.6. If this is really becoming a super big problem all you have to is uninstall java then re install and it should fix it.
You can have many different versions of Java on your system. In general Java depends on environment variables and the PATH environment variable. Some programs and tools look for tool specific environment variables to allow you to use a specific version of Java for that particular tool.
In the case of IntellJ the link that Eddie B posted in his comment explains how IntellJ determines which "installation" of Java it should use.
I have a web Application and i need to upgrade java jre version from 6 to 7 .I am using Eclipse as IDE.I tried to update the Jre from eclipse .I have even updated the JAVA_HOME environment variable but i am getting following error
C:\Program Files\Java\jdk1.7.0_55\jre..\lib\tools.jar
Please ensure you are using JDK 1.4 or above and
not a JRE (the com.sun.tools.javac.Main class is required).
In most cases you can change the location of your Java
installation by setting the JAVA_HOME environment variable.
Thanks
Download java hereand install it as a common application.
Then in Eclipse use Window->Prefrences->Java->Installed JREs
#Roman Bondar I guesss OP wanted to know more than just the setting.
Basically, JREs are meant to be downwards compatible, so that you are able to execute java classes compiled with version 6 with a runtime from java 7.
But as always, there may be special cases when things have to be changed, e.g. container or libraries. I remember a case back when I migrated to java 6 that it required a special version of JBoss.
Check out this Oracle blog as a starting point.
I want to use 1.6 and I've configured it as my JDK version for my Jenkins job, but it keeps building with Java 7 instead. Why is this happening and how can I fix it?
Apparently this is an existing Jenkins bug, but that you can work around it by installing the Environment Injector Plugin and manually setting your path with inject env variable:
PATH=/opt/jdk/jdk1.6.latest/bin:$PATH
Configuration mismatch on jenkins global configuration. JDK installation name is "JDK 6" but is tied to a pre-installed JDK 7. Can't tell how this happened.
So i decided to try the beta of android studio today, but it refuses to run on my 32-bit JRE. I can download the 64-bit JRE, but im not interested in it being my default JRE for various reasons (my current 32-bit eclipse IDE, Processing IDE and Minecraft doesn't like 64-bit to my experiences), and i think that swithing java_home dir all the time will be cumbersome.
So does intelliJ have some way of setting an alternative JAVA_HOME dir like eclipse does in its ini?
In IntelliJ you can specify which SDK to use at project level. go to "File" --> "Project Structure" --> SDKs (list on the left) and you can add/remove paths to different SDKs
Other solution: If you use Windows then I think you can specify JAVA_HOME as system property just for IntelliJ. If you use Linux the solution is similar.
I use IDEA_JDK for this purpose (on linux).
I believe it is STUDIO_JDK for android studio.
For more information on this and other jetbrains IDE's, see https://intellij-support.jetbrains.com/hc/en-us/articles/206544879-Selecting-the-JDK-version-the-IDE-will-run-under
The other answers will not work for 64bit versions. Jetbrains have actually documented this quite well. From https://intellij-support.jetbrains.com/hc/en-us/articles/206544879-Selecting-the-JDK-version-the-IDE-will-run-under:
Java 8
Please be aware that Java 8 is required to run IntelliJ IDEA starting from version 16 on all the supported platforms. It also applies to the lightweight IDEs released from the same branch (144+).
Windows
JDK is bundled with all the product installers and it's recommended that you will use the provided JDK version unless there are any specific issues.
32-bit JDK is located in IDE_HOME\jre directory and is used by the 32-bit product executable.
To run the IDE in 64-bit mode you will need to download and install 64-bit JDK (not JRE) distribution and install it yourself. IDE will find and use it from the registry when you run the 64-bit .exe file (available only for IntelliJ IDEA right now, other products can use the .bat file to run in 64-bit mode).
<product>.exe uses this JDK search sequence:
IDEA_JDK / PHPSTORM_JDK / WEBIDE_JDK / PYCHARM_JDK / RUBYMINE_JDK / CLION_JDK / DATAGRIP_JDK environment variable (depends on the
product, WEBIDE_JDK applies to both WebStorm and PhpStorm before
version 2016.1)
..\jre directory
system Registry
JDK_HOME environment variable
JAVA_HOME environment variable
idea64.exe uses this JDK search sequence:
IDEA_JDK_64 environment variable
..\jre64 directory
system Registry
JDK_HOME environment variable
JAVA_HOME environment variable
It’s also possible to start the IDE with .bat file located in the bin directory, it uses the following JDK search sequence:
IDEA_JDK / PHPSTORM_JDK / WEBIDE_JDK / PYCHARM_JDK / RUBYMINE_JDK / CLION_JDK / DATAGRIP_JDK environment variable (depends on the product)
..\jre directory
JDK_HOME environment variable
JAVA_HOME environment variable
Environment variable must point to the JDK installation home directory, for example:
c:\Program Files (x86)\Java\jdk1.8.0_66
The actual JDK version used by the IDE can be verified in Help | About dialog (open any project to access the menu).
Define IDEA_JDK / PHPSTORM_JDK / WEBIDE_JDK / PYCHARM_JDK / RUBYMINE_JDK / CLION_JDK / DATAGRIP_JDK variable depending on the product to override the default version from IDE_HOME\jre.
Use Rapid Environment Editor to add/edit the variables, it will detect incorrect paths.
Linux
Starting from IntelliJ IDEA 16 and the most recent versions of the lightweight IDEs, we are bundling custom JRE with Linux distributions, just like we've been doing for Mac. Our custom JRE is based on OpenJDK and includes the most up to date fixes to provide better user experience on Linux (like font rendering improvements and HiDPI support).
Boot JDK path is stored in the .jdk file located in the config folder. It can be modified either via the Change IDE boot JDK action or by manually editing .jdk file (if you can't start the IDE to change it via an action).
It's recommended to use the bundled JRE (if available). In case you have any issues with the bundled version, you can switch to the latest version of Oracle JDK or OpenJDK available for your system (OpenJDK 1.6 is not supported, please use 1.7 or later versions, JDK 1.8 is recommended and older Java versions are not supported starting from IntelliJ IDEA 16).
Check bin/.sh file for the JDK search order, it's similar to Windows in terms of the environment variable names. It's a legacy way to adjust the boot jdk, use it for older product versions. Consider using .jdk file instead (see above), so that your modifications can survive IDE updates/re-installation.
Check this answer if you need to install the JDK manually on Linux.
If you have problems with ugly fonts, please see this thread comments for the tips.
Help | About will show the actual JDK version.
Mac OS X
Our latest IDE versions come with the bundled custom JDK 8 which contains the fixes for most known OpenJDK bugs. Should you need to use a different Java version, please refer to https://blog.jetbrains.com/idea/2015/05/intellij-idea-14-1-4-eap-141-1192-is-available/.
If you override IDE JDK version, its path is stored in .jdk file located in the config folder (idea.jdk for IntelliJ IDEA, pycharm.jdk for PyCharm, etc). Delete this file or change the path inside the file manually in case IDE no longer starts and you can't change it via the menu.
If IDE doesn't start and this file doesn't exist, create it manually and specify Java path to use (Java home location), for example:
/Library/Java/JavaVirtualMachines/jdk1.8.0_60.jdk
A reminder - once you set up a JAVA_HOME env variable in Windows, you need to close all your IntelliJ apps, and then start again. Otherwise, there might be troubles with accessing JAVA_HOME variable.