News, Tutorials, Howtos for Ubuntu Linux
OpenJDK and Oracle announced the General Availability of JDK 24 this Tuesday.
Java 24 (Oracle JDK 24) delivers thousands of improvements to help developers maximize productivity and drive innovation. In addition, enhancements to the platform’s performance, stability, and security help organizations accelerate their business growth.
Oracle announced the release of JDK 22 GA this Tuesday.
“JDK 22 delivers 12 enhancements that are significant enough to warrant their own JDK Enhancement Proposals (JEPs), including seven preview features and one incubator feature. They cover improvements to the Java Language, its APIs, its performance, and the tools included in the JDK.”
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Oracle Java JDK 19 is out! Here are the new features and how to install instructions for Ubuntu users.
First, for Linux users the release now ported to support the RV64GV configuration of RISC-V, a general-purpose 64-bit ISA.
The release also introduced record patterns to deconstruct record values. Record patterns and type patterns can be nested to enable a powerful, declarative, and composable form of data navigation and processing. Though it’s a preview feature so far.
There are also 2 other preview features: a foreign function & memory API can interoperate with code and data outside of the Java runtime; a lightweight virtual threads that dramatically reduce the effort of writing, maintaining, and observing high-throughput concurrent applications; pattern matching for switch expressions and statements.
JDK 19 also introduced an API to express vector computations that reliably compile at runtime to optimal vector instructions, and an API for structured concurrency.
Other changes include:
-providerPath option to jarsigner Oracle website provides the 64-bit DEB/RPM packages for Debian, Ubuntu, Fedora based systems. Just go download the package for your system from the link below:
In recent Linux systems, you can simply double-click on the package to install via system Software App. To set the Java home variable and use JDK 19 as default, see this step by step how to tutorial.
This simple tutorial shows how to install the latest Oracle Java (JDK 21 or JDK 24) in Ubuntu Linux via the official binary package.
There used to be unofficial Ubuntu PPA to automate the process of installing Java JDK and setup the environment, however, discontinued. So, here’s the tutorial to manually install the Java package and set as default.
Oracle provides the pre-build binary packages for Linux, Windows, macOS, available to download via the link below:
First, select JDK version, then choose download:
amd64 devices, e.g., modern Intel/AMD CPUs.arm64 (aarch64) devices, e.g., Raspberry Pi and Apple Silicon.If you don’t even know your CPU architecture type, open terminal (Ctrl+Alt+T) and run uname -m or dpkg --print-architecture command to tell.
After downloaded the pre-build package, install it via either option below depends on CPU architecture type.
For modern AMD/Intel platform, press Ctrl+Alt+T to open terminal, and run command to install the downloaded .deb package:
sudo apt install ~/Downloads/jdk-21_linux-x64_bin.deb
Here replace 21 in command if you downloaded JDK 24. Or, just drag and drop the .deb package from your downloads folder into terminal to auto-insert path to that file.
The .deb package include a post-install script that automatically set the JDK installation with a higher priority. So, it should be default if you have multiple java.
Just in case, you may run the command below to manually set default Java:
sudo update-alternatives --config java
In the output, input the number for your desired Java version and hit Enter.
Similarly, you may run the command below to configure default Javac, Jshell, Jar, etc.
sudo update-alternatives --config javac
For Intel/AMD platform, you’re done!
For the ARM computers (e.g., Raspberry Pi, Apple M1/2, etc), first open terminal (Ctrl+Alt+T) and run command to make sure the /usr/lib/jvm directory is exist:
sudo mkdir -p /usr/lib/jvm
Then, extract the downloaded archive to that directory by running command:
sudo tar -zxf ~/Downloads/jdk-21_linux-aarch64_bin.tar.gz -C /usr/lib/jvm/
Also, replace 21 in command with 24 if you selected JDK 24. After that, you may run the command below to list that directory content which should include the new generated jdk-21 (or jdk-21.x.x) sub-folder.
NOTE 1: For Intel/AMD, you’re DONE after installed the .deb package and set default Java. This is only required for ARM platform.
NOTE 2: The JDK root folder-name may vary depends on which package you installed. It may be ‘jdk-21’, ‘jdk-21.0.1’, ‘jdk-24’, ‘jdk-24.0.1’, and so forth. Run ls /usr/lib/jvm to tell and replace jdk-21 in commands below accordingly.
a.) Create symbolic links for the executable files:
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-21/bin/java 1
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-21/bin/javac 1
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk-21/bin/jar 1
As mentioned, you need to replace “jdk-21” in command with e.g., jdk-21.0.1, jdk-21.0.6, jdk-24, jdk-24.0.1, etc. accordingly!!!
Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as you need.
b.) Next, run the commands below one by one, and type number to select Java JDK 21 as default.
sudo update-alternatives --config java
sudo update-alternatives --config javac
sudo update-alternatives --config jar
When done, verify by running command in terminal:
java -version
javac -version
As well, you only need to do this for ARM package. If installed the .deb version, just verify JAVA HOME via the bottom command.
Also, replace ‘jdk-21’ below according to ls /usr/lib/jvm command output (e.g., jdk-21.0.6, jdk-24, jdk-24.0.x).
Option 1.) Set JAVA_HOME for current terminal console, that will work until you close it:
export JAVA_HOME=/usr/lib/jvm/jdk-21
setenv JAVA_HOME=/usr/lib/jvm/jdk-21
Option 2.) To make it permanent, create and edit config file via command:
sudo gnome-text-editor /etc/profile.d/jdk.sh
Depends on your desktop environment, you may replace gedit with mousepad for XFCE, xed for Linux Mint, pluma for MATE, kate for KDE Plasma, gedit for Ubuntu 22.04 or older.
then add following lines:
export J2SDKDIR=/usr/lib/jvm/jdk-21
export J2REDIR=/usr/lib/jvm/jdk-21
export PATH=$PATH:/usr/lib/jvm/jdk-21/bin:/usr/lib/jvm/jdk-21/db/bin
export JAVA_HOME=/usr/lib/jvm/jdk-21
export DERBY_HOME=/usr/lib/jvm/jdk-21/db
And create anther one for C shell:
sudo gedit /etc/profile.d/jdk.csh
add following lines and save it:
setenv J2SDKDIR /usr/lib/jvm/jdk-21
setenv J2REDIR /usr/lib/jvm/jdk-21
setenv PATH ${PATH}:/usr/lib/jvm/jdk-21/bin:/usr/lib/jvm/jdk-21/db/bin
setenv JAVA_HOME /usr/lib/jvm/jdk-21
setenv DERBY_HOME /usr/lib/jvm/jdk-21/db
Finally, change the permissions via command, and it should take place next time you log in.
sudo chmod +x /etc/profile.d/jdk.csh /etc/profile.d/jdk.sh
To verify JAVA HOME, run the command below in terminal at next login:
java -XshowSettings:properties -version
To uninstall the Java package, open terminal (Ctrl+Alt+T) and run command:
sudo apt remove --autoremove jdk-21 jdk-24
In the commands below, replace jdk-21, with jdk-21.0.5, jdk-24, jdk-24.0.1, etc, depends on which version you installed.
For the ARM version, simply remove all the installed files, by running the commands below one by one:
sudo update-alternatives --remove java /usr/lib/jvm/jdk-21/bin/java
sudo update-alternatives --remove javac /usr/lib/jvm/jdk-21/bin/javac
sudo update-alternatives --remove jar /usr/lib/jvm/jdk-21/bin/jar
sudo rm -R /usr/lib/jvm/jdk-21
sudo rm /etc/profile.d/jdk.sh
sudo rm /etc/profile.d/jdk.csh
Oracle announced the release of Java 17 as the new Long-Term Support (LTS) release.
Java 17 LTS comes with thousands of performance, stability, and security updates, as well as 14 JEPs (JDK Enhancement Proposals). And Oracle will provide 8-year support for the release with security, performance, and bug-fix updates until 2029.
According to the release note, the next LTS will be Java 21 planned for September 2023, which changes the LTS release circle for every three years to two years.
JDK 17 includes new language enhancements, updates to the libraries, support for new Apple computers, removals and deprecations of legacy features, and work to ensure Java code written today will continue working without change in future JDK versions. It also offers a language feature preview and incubating APIs to gather feedback from the Java community.
Updates in the release include:
Thanks to the “Linux Uprising” team ppa, an installer script has been created to automatically downloads and installs Oracle JDK 17 package, and sets Java 17 as the default Java version (setting JAVA_HOME, etc.) on 64-bit PC and arm64 devices, e.g., Rasperry Pi and Microsoft HoloLens 2.
1.) Firstly, open terminal either from system start menu or by pressing Ctrl+Alt+T on keyboard. When it opens, run command to add the PPA:
sudo add-apt-repository ppa:linuxuprising/java
Type user password when it asks (no asterisk feedback) and hit Enter to continue.
2.) Refresh system package cache. The PPA provides packages for Ubuntu 18.04, Ubuntu 20.04, Ubuntu 21.04, Ubuntu 21.10, as well as two old Ubuntu LTS (14.04 and 16.04). And old Ubuntu releases need to manually update system cache by running the command below in terminal:
sudo apt-get update
3.) Finally install the script package via command:
sudo apt-get install oracle-java17-installer
Once the script starts, it brings you to the screen for the license. Press Tab key on keyboard to select OK and hit Enter.
Then answer “Yes” via arrow keys and hit Enter to start downloading Java 17 package from oracle website.
Terminal will indicate the downloading and installing process for you. When everything’s done successfully, use java --version or javac --version command to verify the installation.
That’s all. Enjoy!
Jetbrains announced the release of IntelliJ IDEA 2018.2.3 a day ago with various bug-fixes and some improvements for v2018.2.
IntelliJ IDEA 2018.2.3 release highlights:
It’s quite easy to install the latest IDEA packages in Ubuntu since Jetbrains offers official snap (containerised software package) package in snappy store.
Simply open Ubuntu Software, search for and you’ll see IDEA ultimate and community packages available for install.
NOTE for Ubuntu 16.04 users who never installed a snap package, make sure snapd is installed by running command in terminal (Ctrl+Alt+T):
sudo apt install snapd snapd-xdg-open
Eclipse 4.8 Photon was released a week ago. You can now install it in Ubuntu 18.04, Ubuntu 17.10, Ubuntu 16.04 easily via snap package.
Eclipse Photon release highlights:
The community has built the snap package of Eclipse Photon. It’s an universal Linux package format that bundles all its dependencies, and auto-updates itself once a new release is published.
The Eclipse 4.8.0 snap can by easily installed in Ubuntu Software:
Note that there are two versions of Eclipse in Ubuntu Software. Take a look at the version number before installing the package.
You can also install the snap by running command in terminal:
snap install --classic eclipse
In addition:
1. For Ubuntu 16.04 users never installed a snap package, make sure snapd daemon is installed via command:
sudo apt-get install snapd snapd-xdg-open
2. For Java environment, either install the OpenJDK via command:
sudo apt-get install default-jre
For Oracle Java 8 or Java 10, see this how to tutorial.
The first bug-fix release of IntelliJ IDEA 2018.1 was released a few days ago with several important and critical bug-fixes.
IntelliJ IDEA 2018.1.1 includes following fixes:
Install IntelliJ IDEA 2018.1.1 in Ubuntu:
Jetbrains offers official snap packages for Ubuntu Linux users. You can install it in Ubuntu 16.04, Ubuntu 17.10, Ubuntu 18.04 via following steps.
1. (Ubuntu 16.04 only) For those who never installed a snap package, open terminal (Ctrl+Alt+T) and run command to install snapd daemon:
sudo apt-get install snapd snapd-xdg-open
No visual feedback while typing your password due to security reason.
2. Then you can search for and install IDEA via Ubuntu Software:
Or run command in terminal instead to install the IDE:
snap install intellij-idea-community --classic
For the ultimate edition, replace intellij-idea-community with intellij-idea-ultimate in the code.
IntelliJ IDEA 2017.3.2 was released earlier today with some new features and numerous bug-fixes.
New Features in IntelliJ IDEA 2017.3.2 includes:
There are a few ways to run the latest release of the Java IDE in Ubuntu desktop. And here are 3 of them:
method 1: Download official Linux package (NON-INSTALL), extract and run the executable to launch the IDE:
method 2: Install the Snap package (runs in sandbox) for Ubuntu 16.04 and higher:
Open terminal via Ctrl+Alt+T or by searching ‘terminal’ from app launcher. When it opens, run command:
sudo snap install intellij-idea-community --classic
Replace intellij-idea-community with intellij-idea-ultimate for ultimate edition. And type your password (no visual feedback) when it asks.
method 3: Install the traditional .deb package via PPA to get the official Linux package and install the application shortcut automatically.
To do so, open terminal (Ctrl+Alt+T) and run following commands one by one to add the PPA and install the .deb packages:
sudo add-apt-repository ppa:ubuntuhandbook1/apps sudo apt-get update sudo apt-get install intellij-idea-community
Also replace intellij-idea-community in the code with intellij-idea-ultimate for ultimate edition.
For the snap packages, you can either remove them from Ubuntu Software, or by running command in terminal:
sudo snap remove intellij-idea-community intellij-idea-ultimate
For the PPA packages, remove them either via Synaptic package manager, or by running command in terminal:
sudo apt-get remove --autoremove intellij-idea-community intellij-idea-ultimate
And you can remove the PPA via “Software & Updates” utility under Other Software tab.
The first update for IntelliJ IDEA 2017.3 series was release a day ago with few bug fixes.
IntelliJ IDEA 2017.3.1 fixed:
There are a few ways to run the latest release of the Java IDE in Ubuntu desktop. And here are 3 of them:
method 1: Download official Linux package (NON-INSTALL), extract and run the executable to launch the IDE:
method 2: Install the Snap package (runs in sandbox) for Ubuntu 16.04 and higher:
Open terminal via Ctrl+Alt+T or by searching ‘terminal’ from app launcher. When it opens, run command:
sudo snap install intellij-idea-community --classic
Replace intellij-idea-community with intellij-idea-ultimate for ultimate edition. And type your password (no visual feedback) when it asks.
method 3: Install the traditional .deb package via PPA to get the official Linux package and install the application shortcut automatically.
To do so, open terminal (Ctrl+Alt+T) and run following commands one by one to add the PPA and install the .deb packages:
sudo add-apt-repository ppa:ubuntuhandbook1/apps sudo apt-get update sudo apt-get install intellij-idea-community
Also replace intellij-idea-community in the code with intellij-idea-ultimate for ultimate edition.
For the snap packages, you can either remove them from Ubuntu Software, or by running command in terminal:
sudo snap remove intellij-idea-community intellij-idea-ultimate
For the PPA packages, remove them either via Synaptic package manager, or by running command in terminal:
sudo apt-get remove --autoremove intellij-idea-community intellij-idea-ultimate
And you can remove the PPA via “Software & Updates” utility under Other Software tab.
