Because they switched to a new release model which allows for them to get new features out faster. Same thing happened when Firefox and chrome switched to a timed release model. People bitched about version numbers but slowly got use to the fact that "I don't really care that this is firefox 82". From an organization standpoint, this has been great for the Java getting features out. It used to be that they'd say "Ok, we are going to target key feature X for java Y". The problem with that is nearly all project development got devoted to that feature and ultimately "when" java would go out was completely unknown. Further, releases where crazy times for JDK developers. With the new model, they've been able to work on a lot more features in parallel. A ton of usability features made it in (records, pattern matching, string literals) which never would have made it in the old model. Further, it's allowed them to slowly walk in huge features (Valhalla, loom, etc) making pre-emptive changes needed to support massive changes in the future. Post Java 9, the upgrades have been a breeze. Honestly, I almost wish they'd move to an even faster release model to really force people to stop caring so much about these version numbers. Rust does a release every 6 weeks and I think that works great. Nobody cares that it's now Rust 1.50 or whatever. More on reddit.com

this was a little tricky but I have gotten it to work.First you want to get Java 8 installed.Once you install Java,then you need to choose the version cause itll make Java 11 default,once you change it to 8,then the installer runs just fine. Also remember to change the installer to be "executing"(right click,properties,check the box). I think with your case,you should just run this to change it to 8 because I ran into the same issue and once I switched it to 8,I had no problems. sudo update-java-alternatives -s java-8-oracle I should note I am using LTS 18.04 but it should work if youre on 18 or 19 More on reddit.com

Finally I can start migrating from .collect(Collectors.toList()) to toList()

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Why THE HECK IS THERE NOT A BASIC INSTALLER FOR JAVA the package manager can install java... now WHICH java you specifically need... No idea. but the basics will be the same. https://www.digitalocean.com/community/tutorials/how-to-install-java-with-apt-on-ubuntu-20-04 java -version If Java is not currently installed, you’ll see the following output: Output Command 'java' not found, but can be installed with: sudo apt install default-jre # version 2:1.11-72, or sudo apt install openjdk-11-jre-headless # version 11.0.7+10-3ubuntu1 sudo apt install openjdk-13-jre-headless # version 13.0.3+3-1ubuntu2 sudo apt install openjdk-14-jre-headless # version 14.0.1+7-1ubuntu1 sudo apt install openjdk-8-jre-headless # version 8u252-b09-1ubuntu1 Execute the following command to install the default Java Runtime Environment (JRE), which will install the JRE from OpenJDK 11: sudo apt install default-jre The JRE will allow you to run almost all Java software. note: i think you only install ONE of the above packages.. :) unless you know you need more than one version of java.. (i have not messed with java in years) No idea what specific java needs your game may require.. Note - on Ubuntu 20.10 I get the following.. java --version Command 'java' not found, but can be installed with: sudo apt install default-jre # version 2:1.11-72, or sudo apt install openjdk-11-jre-headless # version 11.0.9.1+1-0ubuntu1~20.10 sudo apt install openjdk-8-jre-headless # version 8u275-b01-0ubuntu1~20.10 (You will have to enable component called 'universe') sudo apt install openjdk-13-jre-headless # version 13.0.4+8-1 (You will have to enable component called 'universe') sudo apt install openjdk-14-jre-headless # version 14.0.2+12-1 (You will have to enable component called 'universe') sudo apt install openjdk-15-jre-headless # version 15+36-1 (You will have to enable component called 'universe') the 'universe' they mention is the universe repository in the package manager settings. Otherwise - i think it will install openjdk-11 which is in the default repositories. PS: guides that mention the webup8 repositories - are likely outdated. the webup8 site has stopped hosting the non-free java stuff in their repos due to Licensing changes Installing Oracle JDK 11 Oracle’s licensing agreement for Java doesn’t allow automatic installation through package managers. To install the Oracle JDK, which is the official version distributed by Oracle, you must create an Oracle account and manually download the JDK to add a new package repository for the version you’d like to use. Then you can use apt to install it with help from a third party installation script. More on reddit.com