It only takes a minute to sign up. I want to start toying around with java eventually getting to the point where I can write basic little programs for android or webbut I've managed to have java messed up on my computer from past experiments. I'm not sure which version of java I have, and would like to know if there is a command to see the version of java that is installed and active.Weld alumastar 15x4
Also, which version works best? All this on 32bit Ubuntu I want to use openjdk 7, so how do I uninstall openjdk 6?Semiologia cardiovascular resumo
Is just via USC good enough or is there a command that should be run? This command should tell you what is currently providing the Java virtual machine java and the Java compiler javac :.
This assumes the "alternatives" system is working properly, which might not be the case, depending on how Java has been "messed up" in the past.Rj45 connector wiring diagram
To check this, run:. Otherwise please edit your question to provide details. Then it should be possible to give a more specific answer. You can remove openjdk-6 with the Software Center. There are multiple packages associated with it, so you may need to remove more than one packages. However, whichever method you use, you may want to check first to see what depends on these packages--you might have software installed that specifically needs version 6.
These commands display what version of java the interpreter that runs Java programs and javac the compiler that creates them you have installed.
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I highly suggest using Java 7, but the updates will try to install Java 6 too. That is OK. But your default should still come up as 7. Everything I have thrown at it works as long as your video card drivers work. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. How can I tell what version of Java I have installed? Ask Question. Asked 7 years, 10 months ago.
Active 1 year ago. Viewed k times. Stramato Stramato 1, 1 1 gold badge 11 11 silver badges 16 16 bronze badges. Active Oldest Votes. Eliah Kagan Eliah Kagan The simplest way is: update-java-alternatives -l shows you all the Java versions you have installed.The shell uses environment variables to store information, such as the name of the current user, the name of the host computer, and the default paths to any commands.
You can create environment variables and use them to control the behavior of a command without modifying the command itself. For example, you can use an environment variable to have a command print debug information to the console.
To set the value of an environment variable, use the appropriate shell command to associate a variable name with a value. This form of inheritance can be a useful way to configure the app dynamically. For example, your app can check for the presence or value of an environment variable and change its behavior accordingly.
Different shells support different semantics for exporting environment variables. After you close a Terminal window, variables you set in that window are no longer available. If you want the value of a variable to persist across sessions and in all Terminal windows, you must set it in a shell startup script.Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles. However, you may need it for some programs or games like Minecraft.
We will show you how to quickly and easily check if Java is installed and how to install it. Note that Java can be vulnerable to security problems, and you should protect yourself. If you really need Java for programs or games that you run, read our article about protecting yourself from Java security problems. To check which version, if any, of Java is installed, type the following at the prompt and press Enter.How To Compile And Run Java Programs Using Terminal
If you get a result similar to the one shown in the following image, you do not have Java installed. The list shows you which packages in your system have Java available and the command for installing java is displayed.
Type the following at the prompt and press Enter. This updates all the packages in available in Ubuntu. Type your password at the prompt and press Enter.Ielts liz map
When the update is done, choose which a package from the list to install java. In our example, we installed version 6. Type the following command at the prompt and press Enter. Replace the last part of the command after install with the package from the list that you chose. Because you recently ran another command as root using sudo, you are not asked for your password again.
The progress of the installation displays and then a message displays saying how much disk space will be used. Again, see our article for instructions on how to do this. The Best Tech Newsletter Anywhere. Joinsubscribers and get a daily digest of news, comics, trivia, reviews, and more.Username or E-mail.
You can find Java version on Mac without running a Java applet in your web browser. Fortunately, there are a variety of methods to find the Java version on Mac. Below is a description of some of those methods.
Also see Java Support in Safari Terminal is a program included with macOS that provides command line access to the operating system. To find the Java version using command line, launch the Terminal application. The Java version will display as output in the Terminal window, and will look similar to the output below:. Once you have launched the Java Control Panel, click the General tab.
In the section entitled Aboutclick the About… button. A new About Java window will launch. Java version information will display within the window. You may also test your Java online to determine which version of Java is installed on your Mac.
This utility will not only check your current Java installation, but will also remove old Java versions from your computer that may pose a security threat to your system. If your Java is working correctly, and no out-of-date Java versions are found, you will see the following notification accompanied by information about your Java installation and your computer:.
If your Java is not working properly, the Test Java page displays additional configuration options that you may need to check, as well as download and installation instructions if needed.Trolling motors
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How to find Java version on Mac. Tweets by techhelpkb.Download Help. Use any of these options if you are having trouble running applets to confirm that you have a specific Java version.
The latest version s of Java on your system will be listed as Java 8 with an associated Update number eg. Java 8 Update Only one JRE can be installed on Mac. There can be multiple JDKs installed on a system, as many as you wish. When launching a Java application through the command line, the system uses the default JDK. You can determine which version of the JDK is the default by typing java -version in a Terminal window. If the installed version is 7u55, you will see a string that includes the text 1.
For example:. How can I find which version of Java is installed without running an applet in Windows or Mac? A dialog appears after clicking About showing the Java version.
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. For all lsb version details, use:. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. What terminal command checks the Ubuntu version [duplicate] Ask Question. Asked 7 years, 10 months ago. Active 3 years, 6 months ago. Viewed k times. What terminal command tells the version of Ubuntu.
Nick Bailuc. Nick Bailuc Nick Bailuc 3, 11 11 gold badges 39 39 silver badges 65 65 bronze badges. The duplicate covers both terminal and graphical. IMHO they are the same question. These probably should be merged.
How do I set the default Java (JDK) version on Mac OS X?
Ask Different is a question and answer site for power users of Apple hardware and software. It only takes a minute to sign up. I want to install Java entirely from the terminal without using any GUI. Can anybody give some instructions? I know that I download it with curlbut it seems that curl doesn't play quite nicely with Oracle, and I have no idea what to do after downloading it.
The URL contains an additional directory i. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. How to install Java using terminal? Ask Question. Asked 3 years ago. Active 2 years, 6 months ago. Viewed 59k times.
Active Oldest Votes. To entirely use a bash shell to install e. This successfully installed Java, thanks. Can you fix this? The volume name is "JDK I was trying to install from the command line but could not find a pkg installer online any more. I saw that JavaAppletPlugin. I tried using installer the way you did but it hung just like the GUI version. You are trying to install the runtime I had not thought of this. After updating to Mojave beta 1 my java plugin stopped working.
How to find Java version on Mac
Only brew install worked. Best answer. Mar 30 at The Overflow Blog. The Overflow How many jobs can be done at home? Socializing with co-workers while social distancing.
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