Java is not pre-installed on Mac, Direct download and install Java on Mac OS Mojave running on iMac, Mac Mini, MacBook Pro, Macbook Air. Some apps and framework required JAVA installed on Mac. Apple’s MacOS isn’t dependant on Java. But some Developer required for the compatibility, Security and any other purpose. After the update or clean install your MacOS you need to download java manually as of your requirements using the way given here.
Also, we can Download/install and uninstall if not in use or after use. You don’t know is your Mac system java is installed or School/College computer lab is quite difficult.
Steps to install Java on macOS Mojave: install the latest version of Java
Check out this using command from the terminal.
Open Terminal on your Mac using spotlight search.
Type “Java” and click on return.
If you are showing a message in a popup window like this, that means java installation is required on this system.
Click on More info that redirects to Oracle official page or click here to direct download link of Java up-to-date version for your MacOS version.
You have the latest version of java (JDK8, JRE8) that compatible with MacOS Mojave.
Wait for the download file on your Mac and start the installation. Follow the on screen instruction to install java on Mojave.
Delete Old Version of Java or Uninstall Java on MacOS Mojave
Delete the installed file of Java is really hard to compare to windows PC. On Mac, we need to care all the Plugins copied in Mac’s file system. Let’s find out a file and delete one by one to completely uninstalled Java from any Mac OS X.
Open Finder on Mac. Go to top apple menu, Go > Go to Folder.
Enter below path,
Find and Delete “JavaAppletPlugin.plugin”
Find and Delete “JavaControlPanel.prefPane”
Remove java folder, from this path.
Now, Delete file from Bin folder and Jave is removed.
Uninstalling Java using a command line,
Open Terminal on Mac using Spotlight search. Enter below command one by one and execute it to delete java files from Mac.
sudo rm -rf “/Library/Internet Plug-Ins/JavaAppletPlugin.plugin”
sudo rm -rf “/Library/PreferencePanes/JavaControlPanel.prefPane”
sudo rm -rf “~/Library/Application Support/Java”