Trying to run Ghidra, which require me to download Java runtime and development kit (JDK) and put it on the path. I extracted the JDK and got the bin.
However, I'm not really sure how to do the following steps:
Open ~/.bashrc with an editor of your choice. For example: vi ~/.bashrc
Do I need to download vim for this? I tried inputting this in homebrew and got nothing but a INSERT at the bottom. And when I type step 2 in it it didn't work as well.
At the very end of the file, add the JDK bin directory to the PATH variable:
export PATH=/bin:$PATH
I'm using a Macbook and it would be appreciated if someone can guide me through the process! Thanks :)
After a typical installation of Java/JDK it should already be on the path.
You can verify this by opening the Terminal app and typing in java -version.
If you did a non-standard installation I suggest using homebrew to install the JDK.
Then there should be no reason to update your ~/.bashrc file.
As regards to the editor - use whatever you like.
If you know how to use vim, you can definitely try it - it should be preinstalled on macOS (just type vim in the Terminal).
Related
I'm trying to set up a java project to use openjdk-11 and all the answers I have found so far have me going in circles. I'm using ubuntu 20.04, so I used the command 'sudo apt install openjdk-11-jre'. The installation seemed to be successful but now I can't seem to figure out the file path to the installed JRE. I thought it would be under /user/lib/jvm/java-11-openjdk-amd64 somewhere. When I point eclipse to that location and try to search for a JRE however it doesn't find anything.
I have found lots of examples with info on how to install but nothing about how to track down the exact file path. Any help would be greatly appreciated.
Update
While I was able to find the JRE location, the root problem turns out to be eclipse. I forgot I had an older version (4.6) open since that is what the project was originally using. Once I switched over to 4.18 I was able to add the java 11 JRE.
Using which will give you /usr/bin/java which won't help as it will be a symlink. You need something like
readlink -f $(which java)
you can use the following:
update-alternatives --list java
will gives you something similar to the below:
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
I installed the default java extensions, downloaded jdk-13.0.2 windows installer, updated the path and JAVA_HOME in the environment variables. After searching for answers, I added the settings in VSCode for java.configuration.runtimes and java.home. After all that, when I try to run my java file in VSCode, it gives me the message "Java 11 or more recent is required to run the Java extension. Please download and install a recent JDK... Source: Debugger for Java (Extension)". I'm not sure what I'm missing or what I did wrong. I attached a screenshot of the VSCode settings.
Screenshot of VSCode settings
If you didn't add java to Environment Path, java.exe couldn't be recognized and used except under the java installation directory, and that's why the java extension think you didn't install the required JDK.
Add JAVA to PATH. You can refer to PATH IN The Java™ Tutorials
Press Ctrl+Shift+` in VS Code to open the integrated Terminal,
then run java --version to check if it's the right one;
Install Java Extension Pack in VS Code Extension Marketplace, which includes necessary extensions you need during development.
It seems restarting my computer took care of it. I verified that java was working outside of VS Code but VS Code wasn't wanting to work with java. No changes were made but when I reopened the project it works.
I'm trying to install Eclipse, but I can't get the installer to start. It fails with
"Failed to create the Java Virtual Machine"
How can I resolve this?
Note: I'm on Mac.
Edit the file /Applications/Eclipse.app/Contents/Info.plist
There is a comment for use a particular JVM:
<key>Eclipse</key>
<array>
<!-- to use a specific Java version (instead of the platform's default) uncomment one of the following options,
or add a VM found via $/usr/libexec/java_home -V -->
<string>-vm</string><string>/Library/Java/JavaVirtualMachines/jdk8u192-b12/Contents/Home/jre/</string>
<string>-keyring</string>
<string>~/.eclipse_keyring</string>
</array>
It took me some time to figure this out as well. The main takeaway was eclipse does not support SDK Version 14 (as of eclipse 2020-03). That was not completely obvious to me.
Install a supported version (I used Homebrew to install SDK V8 🍺):
brew cask install adoptopenjdk/openjdk/adoptopenjdk8
If this is the only Java Version you have installed you should be fine and Eclipse should open up. If that is not the case and you have another Java Version installed. You have to tell Eclipse which Version of Java it should be using (see Step 2).
Tell Eclipse which Version to use by editing the /Applications/Eclipse.app/Contents/Info.plist file as described by Juan Ignacio Barisich and Brad Parks. That being the version you installed in step 1.
nano /Applications/Eclipse.app/Contents/Info.plist
# or
open /Applications/Eclipse.app/Contents/Info.plist
<key>Eclipse</key>
<array>
<string>-keyring</string>
<string>~/.eclipse_keyring</string>
<string>-vm</string>
<string>/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk/Contents/Home/jre/</string>
</array>
Disclaimer: Please bare in mind that those were the steps I took to get eclipse running again. Because I'm nowhere qualified to give a precise answer about this please take a look at the comments in case I got something wrong.
Edit: See Christian Fries answer who pointed out that all java versions 8 to 13 are supported by eclipse.
For me, I had to edit the eclipse-inst.ini file located here:
Eclipse Installer.app/Contents/Eclipse/eclipse-inst.ini
and add the path to my local java VM at the very top of the .ini file, which is here:
-vm
/Users/bparks/jdk/jdk1.8.0_162_x64/bin/java
If the Eclipse Installer.app file is in a DMG, right click on it, and copy it, then paste it into another folder. Then right click on that app file, and choose "Show Package Contents", to get into the files inside the application.
If you've already got Eclipse installed, and find it's throwing the same error, you could try a similar approach by editing the following file for Eclipse:
/Applications/Eclipse.app/Contents/Eclipse/eclipse.ini
On mac, you can get the full path you'd need to your java exe by running the following in a terminal, which will copy the path to your clipboard.
$ echo $(/usr/libexec/java_home)/bin/java | pbcopy
Note: The error "Failed to create the Java Virtual Machine" also exists with Eclipse 2020-03 (under some situations, see https://bugs.eclipse.org/bugs/show_bug.cgi?id=561273) and it is not required to use Java 8 (with Eclipse 2020-03).
For the impatient:
You can run Eclipse or the Eclipse Installer with a given VM without changing eclipse.ini by starting it via a command line:
Open Terminal an run:
open PATHTOECLIPSEINSTALLER/Eclipse\ Installer.app --args -vm /Library/Java/JavaVirtualMachines/NAMEOFJDK/Contents/Home/bin
where PATHTOECLIPSEINSTALLER is the path of the folder where Eclipse Installer is located and NAMEOFJDK is the name of the folder with the JDK (11, 12, 13).
For example:
open Downloads/Eclipse\ Installer.app --args -vm /Library/Java/JavaVirtualMachines/jdk-11.0.2.jdk/Contents/Home/bin
In the installer you may select the VM used by Eclipse. Use a compatible VM here and the installer will modify the eclipse.ini for you.
Explanation TL;DR
To clarify this issue:
Eclipse - say Eclipse 2020-03 - runs with Java 11, Java 12, Java 13, but does not run with Java 14. It fails with the message "Failed to create the Java Virtual Machine". This happens for the installer and for Eclipse itself.
You can download Eclipse without the installer from here: https://www.eclipse.org/downloads/packages/
Explanation:
On macOS, if you start a freshly installed Eclipse, it will use the default JVM. The default JVM is obtained by running /usr/libexec/java_home.
This program /usr/libexec/java_home will find the installed JDK with the highest version as default. That is, if you have JDK 14 installed and run Eclipse 2020-03, you will see this error.
Solution
Summarising some other answers here, there are three options:
Once you have removed JDK 14 from /Library/Java/JavaVirtualMachines/ the error will be gone.
If you like to have JDK 14 installed, start the installer with a different JDK via the command line open Path-to-Eclipse-Installer/Eclipse\ Installer.app --args -vm /Library/Java/JavaVirtualMachines/NAMEOFJDK/Contents/Home/bin
You may edit the eclipse.ini (as suggested in other answers) to use a specific JVM.
Referring to Marseille Joseph
https://www.eclipse.org/forums/index.php?t=msg&th=1102885&goto=1823113&#msg_num_13
This worked for me!
Their solution didn't require uninstalling jdk14 or to editing the eclipse.ini file. Instead, do this:
cd /Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/MacOS/
sudo rm /Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/MacOS/libjli.dylib
sudo ln -s /Library/Java/JavaVirtualMachines/jdk-14.jdk/Contents/Home/lib/libjli.dylib libjli.dylib
I started facing the same problem in mac suddenly after updating to macOS Monterey, So I just did the following steps:
Then go to Contents/Eclipse/eclipse.ini file and open it with any text editor and you will see the following:
Add below line before -vmargs as shown in above image:
-vm /Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/bin/java
This below line will be different for all the users:
/Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/bin/java
and you can just get this line copied to your clipboard using this command in terminal:
$ echo $(/usr/libexec/java_home)/bin/java | pbcopy
Similarly will be for STS:
Then go to Contents/Eclipse/SpringToolSuite4.ini as shown below and open with any text editor app.
You will see the following:
Just add the same line that you added for Eclipse in the above steps:
delete all java folder inside /Library/Java
then install a new jdk from
https://adoptopenjdk.net/
which will install at
/Library/Java/JavaVirtualMachines/adoptopenjdk-8.jdk
then try reinstalling eclipse a
I had the same problem in my mac. Here is my solution.
First: I've uninstall all the versions of jdk, because I've try a lot of options.
To do this, you need to go to Library/Java/JavaVirtualMachines
and delete all the folders.
Second: Install jdk 1.8 here is a link to download this version:
jdk 1.8
Third: Install eclipse 2020-03 and thats all.
If you want to use JDK 14, you need to follow this steps:
Open eclipse
Go to Help > Install new software
In the Install window copy the following link in Work with https://download.eclipse.org/eclipse/updates/4.15-P-builds/
Select the third option show in the picture below
Then, click "next" and finish the install
Now you have to change the options, go to Preferences (command + ,) > Java > Compiler and search the version 14. Before this step you need to install jdk 14 (link) Perhaps eclipse would suggest you to change to the correct JREs, for this you need to go to Java > Installed JREs and add the correct version. When you click add you need to choose he JRE type, in my case I use a MacOS X VM and Standard VM, then you have to choose the directory (/Library/Java/JavaVirtualMachine/jdk-14/Contents/Home and click open you could give a JRE Name and finish eclipse will be restart and now you can use eclipse with java 14.
This works for me, I hope you have understood me.
Go to /Library/Java/JavaVirtualMachines
Delete all version except one in use.
Install jdk 8 from brew work for me. You can get the instruction on installing Jdk 8 from HomeBrew here How to install Java 8 on Mac
I met this problem with eclipse-java-2020-03-M2-macosx-cocoa-x86_64, and opendjdk11. The latest eclipse installer at the moment also complained same error.
After I switched back to openjdk8, everything goes well...
For Windows OS:
open eclipse.ini in the Eclipse program folder
add the below lines at the top of the file
-vm
path-to-java-bin\javaw.exe (for example: C:\Program Files\Java\jdk-11.0.10\bin\javaw.exe)
I mounted eclipse dmg file and copied eclipse inside Applications. Then I tried to modify file Info.plist located inside Contents as below, but was getting that this file Info.plist is readonly error. I noticed that I already have read and write permission but still it was giving me that read only error. Then I moved the contents of Eclipse to some other local folder and then edited Info.plist, it did not give me readonly error.
<array>
<string>-vm</string><string>/Library/Java/JavaVirtualMachines/jdk1.8.0_65.jdk/Contents/Home/bin/java</string>
<string>-keyring</string>
<string>~/.eclipse_keyring</string>
</array>
Finally I am able to open eclipse.
I recently decided to start trying Android app development, so I downloaded the Java SE Development Kit 8 (x86) for Windows (I got Windows 8 64bit, but my guide recommends getting the 32bit one), the Android SDK, and the Eclipse IDE for Java Developers (x86).
However, my Eclipse won't launch when I double click eclipse.exe! Instead, I get the following error message:
I tried adding Java to my Path variable in my Environment variables as suggested in some of the solutions I looked up, but it still doesn't launch properly.
Anyone know what else I can try? Also, if possible, please do not use super-technical vocabulary as I'm new to these kinds of stuff and will not understand you...thank you haha :D
I had the same issue and was trying to install different versions of JDK: 1.6, 1.7, 1.8.
It didn't help much.
The problem was resolved when I changed PATH variable by removing
C:\ProgramData\Oracle\Java\javapath;
In command prompt I also ran following commands:
set JAVA_HOME=C:\Program Files\Java\jdk1.8.0_25
set PATH=C:\Program Files\Java\jdk1.8.0_25\bin;%PATH%
But I think the most important was to remove C:\ProgramData\Oracle\Java\javapath; from the PATH.
I know exactly how to solve your problem. Go to search and put in environment, a prompt will come up and ask you to "Edit environmental variables for your account" click that and a window will pop up. There will be the current paths which are running on the top (you should have your JDK version running, mine is 1.8) and on the bottom part there will be paths to choose from. Select (on the bottom part) the java path and delete it, then click okay. This should work.
If it didn't work, You may also add a new path to the java bin folder which worked for me.
Here is an alternative:
As described here, make sure that you have the -vm option set in your eclipse.ini file.
It must be an absolute path and on 2 separate lines:
-vm
<Absolute Path>\javaw.exe
Save your .ini and relaunch Eclipse
One line answer, remove 'C:\ProgramData\Oracle\Java\javapath;' from your path variable. It will start to work.
Most errors with starting eclipse happen due to multiple JRE or JDK version which makes the installer go nuts.
Solution: Go to Control Panel -> Uninstall Programs
If you're running 64-bit java, then uninstall all Java without the 64bit indicator. If 32-bit, then uninstall all that have 64-bit
It works like magic!
What worked for me was having installed adoptopenjdk11 using Chocolatey package manager:
choco install adoptopenjdk11
Is it possible to get Java in zip format? I don't want to install it by getting .exe file.
Is there any zip version of Java 1.8 so that I can download it and extract it and start using it in my Windows machine (64-bit processor)?
You can extract the JDK folder from the Installation EXE.
Check this link for the steps. The post was for JDK 1.7 it will work for JDK 1.8 also
Do the following.
Steps
Download JDK from Oracle
Download and Install 7-zip from here
Open installition exe using 7-Zip
Extract the tools.zip
Extract the content of tools.zip to a folder (e.g. c:\jdk).
Open the extracted folder in cmd prompt.
Execute for /r %x in (*.pack) do .\bin\unpack200 -r "%x" "%~dx%~px%~nx.jar" command
Set JAVA_HOME to the jdk (e.g c:\jdk) folder.
Add %JAVA_HOME%/bin to the PATH env variable.
Testing
Run the following command to check the installation, it will print the version of JDK.
c:> javac -version
javac 1.7.0_51
NOTE: Tested with JDK 1.7 and 1.8
Update 1
Edited the answer to add the steps in the answer itself instead of the link to a blog post.
Update 2
For 64-Bit please check unpack-jdk-x64.bat by grabantot
I was looking for a solution to this as well. I'm not sure why the OP wanted to do this. I'm just trying to get a newer version of java for new development while not interfering with an older Java install which a legacy application requires (I'd like to update the legacy app, but it's not an option, now)
I think the hack I am going to try is this:
Install 1.8
Take a copy of the install folder
Uninstall 1.8
Reinstall / Repair 1.7
restore the copy of 1.
I'm sure if I had a better understanding of what the install is doing, this would not be necessary.
I had a spare virtual machine hanging around (if not you could build one or maybe even download one) so I:
installed the Oracle JDK in the guest
copied the jdk folder from the guest to the host
added a JAVA_HOME environment variable.
The operating systems obviously have to be close (not sure how close, I used Windows Server 2008 64 bit guest on a Windows 10 64 bit host and it seemed to work).
Was a quick fix for me as I didn't want a full install and wanted to remove it afterwards.
If you do not have permission to unzip zip file then you cannot install java .
As java does not need installation for running . You just need to give path of java.exe where it is located .
In Windows it is located in C:\Program Files\Java\jdk1.8.0_05\bin
For a solution you can run installer on any machine that you have permission and just copy and paste the folder of java to anywhere in your system (Machine where you have administrative rights problem) . and just set the path as by opening command prompt as set path="C:\Program Files\Java\jdk1.8.0_05\bin"
java will be working as you want
The following worked for me (I had JDK 1.8 installed and needed the 32 bit version as well):
Verify the current version with java -version
Assuming a different version (minor or major is being installed), download the relevant JDK installable from Oracle and run it. In the
first dialog, specify a different folder than the default location
(might work with the default one as well), then select Next. It will
extract the files there in this folder, then it will asl for the
folder where the JRE is to be installed. Simply close the installer,
now you should have just the JDK in the specified folder.
Rerun java -version, it should give you the same version as earlier.
Worst case, if it shows the newer version, go to your system path (Right click My Computer (or This PC) -> Properties -> Advanced
system settings -> Advanced tab -> click on Environment variables
button) and remove the Oracle javapath entry (From the Path variable
in the bottom part of the window). The add the older java version's
bin folder to the path variable in the beginning.
for /r %x in (*.pack) do .\bin\unpack200 -r "%x" "%~dx%~px%~nx.jar"
Is this working for linux shell scripting , I got syntax error for the above.