Recently, I want to upgrade my java from 8 to 11. Then checking my machine using java -version, it shows as follows:
java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.251-b08, mixed mode)
Then, I think there is only java-8 there. But then I use homebrew with brew install java11 it shows this:
==> Formulae
app-engine-java java javacc jslint4java pdftk-java
google-java-format java11 ✔ javarepl libreadline-java
==> Casks
eclipse-java eclipse-javascript oracle-jdk-javadoc homebrew/cask-versions/java-beta
If you meant "java" specifically:
It was migrated from homebrew/cask to homebrew/core.
I am confused now: are these 2 versions installed in my machine, or only one there? If 2 here, how to I specify the path if I want to use java11.
In Homebrew, java11 is an alias for the formula openjdk#11. What you want is a cask, specifically temurin11, which can be installed by running this command:
brew install homebrew/cask-versions/temurin11
(Temurin is the official successor of AdoptOpenJDK.)
Related
I'm trying to install JRuby-9.1.13.0 with rbenv on MacOS.
The issue is that for some reason still Java 7 (1.7) is required, which no longer officially supported.
rbenv install --verbose jruby-9.1.13.0
ERROR: Java 7 required. Please install a 1.7-compatible JRE.
BUILD FAILED (OS X 10.13.1 using ruby-build 20170914)
The JRuby wiki mentions that Java SE should be installed, but not which specific version.
Installed is Java 9.
java -version
java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)
A Java 8 version is also installed.
jenv versions
system
* 1.8 (set by /Users/<folder>/.java-version)
1.8.0.152
9.0
9.0.1
oracle64-1.8.0.152
oracle64-9.0.1
Is Java 7 really a requirement for installing JRuby and therefor my setup is wrong?
Or is this an issue of JRuby or rbenv and installing JRuby should be also possible with Java 9 (Java 8)?
IIRC I fixed the jenv setup and switched to Java 1.8, then I was able to install JRuby.
I am trying to install eclipse-cpp oxygen on macOS Sierra 10.12. While installing it i get an error that java version is not 1.8, while I had already installed latest JDK package. on terminal it shows java version as below
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-468-11M4833)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-468, mixed mode)
Please suggest how can I upgrade my java version.
Apple don't provide a version of Java greater than Java 6. You must install Java 8 from the Oracle site.
In order to run Eclipse you must install the full JDK, the JRE download is not enough as it does not include the java executable.
The Oracle site is here
You can install Java8 from here.
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
make sure to check the latest binaries of java and javac in PATH. You can override the old java binaries in path.
I checked my java version from terminal .I got this information
Last login: Sun Mar 15 08:46:08 on ttys000
localhost:~ naveenkumar$ java -version
java version "1.7.0_10"
Java(TM) SE Runtime Environment (build 1.7.0_10-b18)
Java HotSpot(TM) 64-Bit Server VM (build 23.6-b04, mixed mode)
localhost:~ naveenkumar$
I install new java 1.8 JRE .close my terminal .Agan i type java -version .I found the same version .
why ? how to upgrade java version.
You installed Java 8 but it didn't overwrite this: /usr/bin/java
The easiest way for you to solve this problem is to install Java 8 JDK, not JRE. After install JDK, your path should be automatically updated.
I downloaded Eclipse Luna and ran from the terminal in Mac OS X:
> /Applications/Eclipse.app/Contents/MacOS/eclipse
JavaVM: requested Java version (1.8.0) not available. Using Java at "/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home" instead.
However, I have:
> java -version
java version "1.8.0_20"
Java(TM) SE Runtime Environment (build 1.8.0_20-b26)
Java HotSpot(TM) 64-Bit Server VM (build 25.20-b23, mixed mode)
What am I doing wrong?
Luna seems currently having a bug: it installs the wrong Java version as its own dependency and then fails claiming that version is wrong.
You need to install Java separately (download official SDK from Oracle website) and make that one default. Be sure you install SDK and not the web plugin. Type java -version to verify the version and then which java to tell the exact path. Edit eclipse.ini as usual and set there the correct path to Java executable.
I downloaded JDK for Mac OS X 10.9.1 from Oracle, but I had to install another Java from Apple site once more, as I couldn't launch eclipse with it.
These are two pages that I referred.
Installing Java on OS X 10.9 (Mavericks)
http://support.apple.com/kb/DL1572?viewlocale=en_US
Now I have three java binaries installed in my computer.
Installation A
/System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
Installation B
/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)
Installation C
/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/bin/java
java version "1.7.0_51"
Java(TM) SE Runtime Environment (build 1.7.0_51-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.51-b03, mixed mode)
I found that I can easily remove Installation C, however I'm not sure if this is OK.
When I invoked java from command line, it points to Installation A.
java -version
java version "1.7.0_51"
ls -alF `which java`
lrwxr-xr-x 1 root wheel 74 Jan 15 09:12 /usr/bin/java# -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/java
Is there any way to use just one JDK 1.7 for Mavericks by removing two of them safely?
EDIT
After some setup and test, I have only one Java (1.6) installed.
I have Installation B, and now Installation C is linked to Installation A.
For using eclipse, I had to make Compiler Compliance level to 1.6 to use it (from the help java.lang.UnsupportedClassVersionError Unsupported major.minor version 51.0).
EDIT2
This seems to what happened.
Installation of Apple Java
Installation A
Installation B is a symbolic link to A
Installation of Oracle Java
Installation C
Changed the Installation B that
Created a /System/Library/Frameworks/JavaVM.framework/Versions/A
Copied files from Installation C (not symbolic link)
Make a symlink Current to Versions/A
I tried to install Oracle Java only by removing Apple Java, but I got installation error, so I guess Apple Java is needed to install Oracle Java.
Specify the JVM for Eclipse
You can specify JDK version for usage with Eclipse in eclipse.ini. This will resolve problem with starting Eclipse.
-vm
/Library/Java/JavaVirtualMachines/jdk1.7.0_51.jdk/Contents/Home/bin/java
Warning: Add this configuration before -vmargs.
Master your Java Environnement with jenv
It is much easier to maintain multiple JDK versions with jenv.
jenv is for a equivalent of rbenv, but for Java environnement. It allow to easily switch between several JDKs installations (already presents), and configure which one to use per project.
Eclipse JDK
Setting JDK in Eclipse
It seems like that the oracle JDK can be just removed. For eclipse, I could add Installation A as a default JRE from Java Build Path -> JRE System Library -> Installed JRES -> Add ...