I am beginner in linux (running Linux Mint 18.3), and trying to set-up my environment for Java development. I've done this several times on my Windows machine, and it always worked, but couldn't make it work for linux.
Running command java-version returns the following:
openjdk version "1.8.0_162"
OpenJDK Runtime Environment (build 1.8.0_162-8u162-b12-0ubuntu0.16.04.2-b12)
OpenJDK 64-Bit Server VM (build 25.162-b12, mixed mode)
Still, when I open IntelliJ, it says that Project SDK is not defined. When I am trying to set it up to the folder /usr/lib/jvm/java-8-openjdk-amd64/jre/bin (being the location I found digging into my filesystem starting with command whereis java) it says that "The selected directory is not a valid home for JDK". I've added manually the path also to $JAVA_HOME and '$PATH' but the problem persists.
The path you posted says "jre" in it, you need the JDK.
You need shoose JDK path
without BIN folder, like D:\java\jdk\jdk1.8.0_162
Related
I get an error trying to install Eclipse 4.7 (Oxygen) Oracle Corporation using the installer program, eclipse-inst-win64.exe Am I missing a system variable? Am I missing a prerequisite? This computer is locked down pretty tight. However I am installing by running as an administer.
First I installed the Oracle JDK 8.162 64-bit - No problems
Then I ran the eclipse-inst-win64.exe installer and quickly got the following error:
The Eclipse Installer executable launcher was unable to locate its companion shared library.
I thought this could be just that the program did not know where the JDK was installed. The JDK installer does not set any environment variables except for adding the path to the JDK to the PATH variable. So I searched StackOverflow for a list of JDK variables to add. I added the following new system variables:
CLASSPATH = .;%JAVA_HOME%\lib;%JAVA_HOME%\jre\lib
JAVA_HOME = C:\Program Files\Java\jdk1.8.0_162
JAVA_TOOL_OPTIONS = -Dfile.encoding="UTF-8"
JDK_HOME = %JAVA_HOME%
JRE_HOME = %JAVA_HOME%\jre
I modified the Path variable to put the bin directory first:
PATH = %JAVA_HOME%\bin;C:\windows\system32;C:\windows… rest of the existing path variable
I ran the eclipse-inst-win64.exe installer again and got the same error:
I rebooted but still got this error.
I tried to "run as administrator" but got the same error.
Some people suggest that the path can get too long with the default installation directory so I tried installing the JDK in C:\JDK\ but still got the same problem.
Java seems to be installed properly:
H:>java -version
java version "1.8.0_162"
Java(TM) SE Runtime Environment (build 1.8.0_162-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.162-b12, mixed mode)
I still assume that I made a mistake with my system variables or my JDK installation.
I assumed the "companion shared library" was inside the JDK installation. I extracted the installation files to another directory (C:\eclipse) and then it ran. The "companion shared library" must have been inside the zipped installer. I fixated on the idea that the problem had to be a failure to connect to the JDK that I did not consider any other possibilities. It is installed now.
I have trouble when trying to open my jar files with the following command:
java -jar software.jar
They load until a certain point and then nothing happens.
I deinstalled default-jdk and OpenJDK with synaptic and re-installed it with apt-get, but nothing changed. I had a similar problem one month ago and solved it (apparently only temporarly) by deleting the package gcj-5-jre-lib (5.4.0-6ubuntu1~16.04.4) (Java runtime library for use with gcj (jar files))
The following outputs will help:
java -version
openjdk version "1.8.0_131"
OpenJDK Runtime Environment (build 1.8.0_131-8u131-b11-2ubuntu1.16.04.3-b11)
OpenJDK 64-Bit Server VM (build 25.131-b11, mixed mode)
javac -version
1.8.0_131
My variables $JAVA_HOME and $JRE_HOME were correctly added to my $PATH.
I'm on Ubuntu 16.04
EDIT
Here is an example of what I get when I try to start PhyDE.jar
java -jar PhyDE.jar
Welcome to PhyDE 0.9971!
Reading preferences.
Creating PhyDE-Application window
Checking for updates...
You are using the latest version of PhyDE
Done with checking for updates
When checking the core use with the command top I see that the process is active, but the user interface does not open as it usually does. I am located in the folder where the jar file is, and same happens with other jar files.
First of all, I know that this question has been asked before maybe more than once, like this one for instance Android Studio - No JVM Installation found but i couldn't know the path that i have to refered to.
i already installed jdk-8u31-windows-x64 and i am working on windows 7 64 bit, when i open Android Studio, i got message:
it seems obvious that i should add a JAVA_HOME system variable, but what is the value of that variable?
after installing jdk-8u31-windows-x64, i found this folder on my computer
C:\Program Files (x86)\Java\jre1.8.0_31, should I refered to it? or to the bin inside it? or should I install other stuff?
Note 1:
when I type java -version on my cmd, I got this:
java version "1.8.0_31"
Java(TM) SE Runtime Environment (build 1.8.0_31-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.31-b07, mixed mode)
Note 2:
Yesterday I formatted my laptop and installed the latest version of java from the official website of java
The JAVA_HOME should contain the path of the 64-bit JDK.
C:\Program Files (x86)\Java\jre1.8.0_31 is the path of a JRE. Normally the JDK directory should be something like jdk1.8.0_31 in your case, and the JAVA_HOME would store the absolute path of this directory, without the bin directory. Try searching for that directory under C:/Program Files (C:/Program Files(x86) is usually for 32-bit installations).
It would be better to also install JDKs in a path that does not have space.
My intention is to do a bit of modding of Minecraft using MCP. For that, my Java JDK needs to be specified in the system PATH and working. Unfortunately, it isn't working as typing "java -version" returns the version I use for running Minecraft (JRE7), not the one I've specified in the PATH (JDK6). (Note: JDK6 is supposedly what's needed for this, and the JRE obviously wouldn't work for development anyway.)
Here's my full PATH:
C:\Program Files\Java\jdk1.6.0_45\bin;C:\Program Files (x86)\OpenVPN\bin;C:\Program Files (x86)\Google\google_appengine\
The specified JAVA_HOME:
C:\Program Files\Java\jdk1.6.0_45
And here's the result of "java -version", even after a full system restart since installing the JDK and setting the PATH:
java version "1.7.0_45"
java(TM) SE Runtime Environment (build 1.7.0_45-b18)
java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
Help would be massively appreciated, thanks!
x_a_horse_with_no_name's comment got it! I simply renamed java.exe and javaw.exe in C:\Windows\System32 (& in \SysWOW64), thereby forcing Windows to instead read from the PATH. My guess is that the JDK6 install refused to overwrite the JRE7 files as they were newer or something. Regardless, problem solved, thanks!
Hi everybody.
The problem: elcipse-3.5.0 (Galileo) spits with an error when I try to launch it by clicking its launcher. The curse sound like this:
A Java Runtime Environment (JRE) or
Java Development Kit (JDK) must be
available in order to run Eclipse. No
Java virtual machine was found after
searching the following locations:
/home/emanemos/bin/eclipses/eclipse-3.5.0/jre/bin/java
java in your current PATH
However, everything goes smoothly when eclipse is started from console.
Before installing eclipse I've installed jdk1.6.0_16. I also created the $JAVA_HOME variable and changed my $PATH:
$ echo $JAVA_HOME
/usr/lib/java/jdk1.6.0_16
$ echo $PATH
/home/emanemos/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/java/jdk1.6.0_16/jre/bin
So that, my terminal got to know what java is:
$ java -version java version
"1.6.0_16" Java(TM) SE Runtime
Environment (build 1.6.0_16-b01)
Java HotSpot(TM) Client VM (build
14.2-b01, mixed mode, sharing)
Then a folder eclipse was extracted from .tar.gz package under the directory ~/bin/eclipses. I changed the folder's name eclipse to eclipse-3.5.0 and changed $PATH again:
$ echo $PATH
/home/emanemos/bin/eclipses/eclipse-3.5.0:/home/emanemos/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/lib/java/jdk1.6.0_16/jre/bin
From this moment I was blessed to launch eclipse from console by the command eclipse.
However, I feel desperate about using the eclipse's application launcher.
Thanks in advance. I would be grateful for any help.
The message says "No Java virtual machine was found after searching the following locations: /Applications/eclipse/Eclipse.app/Contents/MacOS/jre/bin/"
I have solved it creating the folder /Applications/eclipse/Eclipse.app/Contents/MacOS/jre/bin and linking to the command at /usr/bin/java:
ln -s /usr/bin/java /Applications/eclipse/Eclipse.app/Contents/MacOS/jre/bin/java
Add this to eclipse.ini:-
-vm
$Java_home/jdk1.5.0_14/bin/javaw.exe
I could be off, but it looks to me that you don't have JAVA in your path. If you notice, you had to add it via the echo command. However, that only stays for that session of the terminal. You don't permanently affect the system. (I believe that's why you can launch from the terminal, but not via the launcher.)
Do you have the Java JRE actually installed on your system? If not, I would recommend doing that as that should do all the setup that you would need, then try running Eclipse again.
Edit: I noticed you said that you did install the 1.6 JDK. This should have fixed your problem. If Java is not in your path when you first open up your terminal, then that (I believe) is your real problem and you may need to do a reinstall or troubleshoot there.
(Making a big assumption that you're on Linux using X)
If you've installed the Java JRE without logging out and back in to the X session, the environment the session is in won't contain the $JAVA_HOME variable. It may just be a case of logging out and back in in order to get a new X session.
If you want to keep the same session running, you could try it out by pressing Ctrl+Alt+F9 to start another GUI session.
Fazil Baghirzade i solve the this problem
A Java Runtime Environment (JRE) or Java Development Kit (JDK) must be available in order to run Eclipse. No Java virtual machine was found after searching the following locations:
c:\Program Files\Eclipse\jre\bin\javaw.exe 'javaw.exe' in your current path
go to the "C:\Program Files\Java\jdk1.6.0_39" in this folder have "jre" folder copy it and paste the eclipse folder
thats all!!!