Are you unable to get a program to work because "the version of Java installed on your computer is not recent enough" or does not match the one required by the software in question? Don't worry, it's a fairly common problem. All you have to do to solve it is to check the version of Java installed on your PC and eventually update it to the latest available.
Updating Java to the latest version available is important not only for the proper functioning of Java-based software (and online services), but also for security. Java, in fact, is often subject to security holes and using outdated versions of the software exposes the system to attacks by malicious people, who could exploit Java vulnerabilities to attack the computer, infect it with malware and steal confidential information.
Having made this necessary premise, let's ban the chatter, let's roll up our sleeves and see, together, how to check Java version installed on your computer. In this way you will be able to find out if the version of Java in use on your PC is safe, if you need to update it and / or if you need to remove obsolete versions of the software still unnecessarily present in the system. I assure you that this is really a breeze. Enjoy the reading!
Go to ▶ ︎ immediately Check Java version on Windows | Uninstall outdated versions of Java on Windows | Check Java version on macOS | Frequent problems related to Java
Check Java Version on Windows
The first step you need to take for check Java version on a PC Windows is to click on the button Start (the flag icon located in the lower left corner of the screen) and search control panel on the menu if you press.
At this point, select the voice Control Panel from the search results (it should be the first result) and, in the window that opens, expand the drop-down menu View by (top right) to activate the ad display Big icons o Small icons in the Windows Control Panel.
Once this has been done, click on the icon Java and, in the window that opens (ie the Java control panel), presses the button Informazioni su contained in the card General to view all information relating to the version of Java in use.
If you want to check the availability of new versions of Java, select the tab Update in the Java Control Panel and click the button Update now. If a new version of the software is available, you will be asked to install it (and you will have to accept), while if it is not available you will see the message "The latest Java platform is already installed on this system".
If you have multiple versions of Java installed on your PC and you want to view all of them, select the tab Java in the Java control panel and click on the button View. A window will open in which you can find all the versions of Java installed on your computer, divided into User e System, that is, in the versions of the software used by the user account currently in use and those shared with all accounts on the system.
If for one reason or another you are unable to access the Java control panel, you can find out which versions of Java are installed on your PC by clicking on the button Start Windows (the flag icon located in the lower left corner of the screen), looking for control panel in the menu that opens and selecting Control Panel in the search results.
In the window that opens (i.e. the classic Windows control panel), click on the item Uninstall a program or on the item Programs and features (depending on the type of display active in the control panel) and you will be able to view the list of all the programs installed on your computer.
In the list of software installed on your PC you may find different versions and variants of Java. For example, there is the Java Runtime Enviroment (also said simply Java) which is what allows you to run online and offline applications written in Java, and then there's the Java Development Kit which, on the other hand, contains all the tools necessary for developing applications in Java.
If you have more than one version of Java installed on your computer, I highly recommend you remove older ones and to keep only the most recent one. In this way you will be sure that you are running the newest, and therefore more secure, version of the software and that you are not taking unnecessary risks related to computer security.
If any program you use (e.g. a software from the Revenue Agency) requires a specific version of Java that is different from the most recent one, you will have to give up the latter, look for alternatives or you will have to expose your system to potential risks by keeping the obsolete version of Java: the choice is yours. If you are not really new to the computer world, you could "bypass" the problem by installing the old version of Java and the program that requires it in a virtual machine and relegate the potential security risks to that by keeping your system "real". "reasonably safe.
Uninstall Obsolete Versions of Java on Windows
If you have found more than one version of Java on your PC and you want to remove the obsolete ones, go to classic control panel Windows as I explained before and click on the item Uninstall a program or on the item Programs and features to view the list of programs installed on your computer.
At this point, locate the Java version you wish to remove, select it and click the button first Uninstall / Change located at the top left and then on the button Yes per due turn consecutive.
Alternatively, if you want to simplify your work a little, you can connect to this web page and use the service for the uninstalling outdated versions of Java offered by the official Java website.
To use this service, you must use a browser of your choice Internet Explorer o Firefox (i.e. a browser that still supports Java) and press the button first I accept the terms and conditions and want to continue e poi quello Run.
Within a few seconds, the list of Java versions installed on the PC will appear and you will be offered the opportunity to uninstall all the obsolete ones by clicking on a simple button: Uninstall selected versions. If any step is not clear to you or you want more info on how to uninstall Java, consult the tutorial that I have dedicated specifically to this operation.
Check Java Version on MacOS
If you have one Poppy and you want to check the version of Java installed on your computer, all you have to do is open System preference (the gear icon located in the Dock bar) and select the icon of Java from the window that opens.
The Java Control Panel should now be open: if so, select the tab General, pigia sul pulsating Informazioni su and a window will appear with all the details relating to the version of Java currently installed in macOS.
To check the availability of new versions of Java, select the tab Update from the software control panel and wait a few seconds for it to check for updates. If updates are available, agree to download and install them on your Mac by pressing the appropriate button that appears on the screen. If you need more detailed instructions on the whole procedure, read my tutorial dedicated to the Java update.
To find out if there are multiple versions of Java installed on your Mac (which is quite unlikely since macOS prevents you from installing outdated versions of Java and automatically updates those already installed on your computer), select the tab Java in the Java control panel and click on the button View. A window will open with all versions of Java installed on your computer.
In case you need to uninstall Java due to some malfunction, open the terminal macOS (which you can find in the Other Launchpad) and issue the following commands.
- sudo rm -fr /Library/Internet Plug-Ins/JavaAppletPlugin.plugin
- sudo rm -fr /Library/PreferencePanes/JavaControlPanel.prefpane
At this point Java is no longer present on your computer and you can proceed to reinstall it by downloading it normally from the site java.com. You find everything explained in my tutorial on how to install Java.
Frequent Problems Related to Java
If after removing outdated versions of Java from your computer you are still experiencing problems and / or malfunctions, try the suggestions below.
- If you can't get Java to work in your browser, make sure you are using a Java compatible browser and have enabled the plugin in the program settings. Currently, only Firefox, Internet Explorer and Safari support Java. Chrome starting from version 45 no longer supports it and Edge has never supported it. If you use Firefox, Internet Explorer or Safari, you must also activate the plugin in the browser settings. To do this, follow the directions in my tutorial on how to test Java.
- If you can't get applications written in Java to work, try resetting the Java bindings on the computer and changing the system variables. You find everything explained in my tutorial on how to open JAR files.
- If you are using Ubuntu but are unable to install or configure Java, follow the advice in my guide on how to install Java Ubuntu and you should be able to solve the problem.