Īlias u7='source /home/aboullaite/Utils/Java/u7.sh'Īlias u8='source /home/aboullaite/Utils/Java/u8.sh'Īlias u9='source /home/aboullaite/Utils/Java/u9.sh'Īnd That's all. The final step is to add an alias in ~/.bashrc file to source our script as follow. Note that I'm using u8.sh to make he switch to Java 8, and u9.sh for Java 9 and so on. Then, for each version I created a script that contain the following lines (in the example below, I'm showing the one for java 8): sudo update-java-alternatives -s java-8-oracleĮxport JAVA_HOME=/usr/lib/jvm/java-8-oracle/ Press to keep the current choice, or type selection number:īut I'm using it just to get the Installation path of each Java version. * 0 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 auto modeġ /usr/lib/jvm/java-6-oracle/jre/bin/java 1 manual modeĢ /usr/lib/jvm/java-7-oracle/jre/bin/java 2 manual modeģ /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual modeĤ /usr/lib/jvm/java-8-oracle/jre/bin/java 3 manual modeĥ /usr/lib/jvm/java-9-oracle/bin/java 4 manual mode There are 5 choices for the alternative java (providing /usr/bin/java). Running this command shows a list of installed Java JDKs and JREs allowing one to be selected as the default that is used when java needs to be executed. Today, I'll share with you my tip on this subject. Working with multiple Java versions in your machine is a normal thing, especially if you're a Java developer, and because I'm a (very) lazy person, I'm always looking for a quicker/easier way to make the switch. Decide between a JDK or JRE installation. To download and install Java on Windows, MacOS or Ubuntu, follow these steps: Allocate 400 MB of hard drive space for the Java download and installation. So whenever Oracle will release the update, I can simple upgrade via package manager. To run Java apps, open JAR files or compile some source code into bytecode you’ll need to install Java. The Wepupd8 team didn’t add any binary for Oracle JAVA installation and they made a script to download the Oracle JAVA from Oracle website and install it straight away. Open your terminal, navigate to the saved location, and then run java -Xms2G -Xmx2G -jar paper.jar -nogui. Running The Server To run the server, simply start it up like any other Java application. Click on the build number to download a file. Personally I prefer using Wepupd8 PPA to manage JAVA installation, it makes my life a lot more easier especially for updates. Paper provides runnable server jars directly from our websites downloads page. If you're using Ubuntu Linux on your daily basis work, you've probably Java installed on your machine.
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