javac does not work in ubuntu terminal

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后悔当初
后悔当初 2021-02-06 23:41

When I try to compile a java program with javac, I get an error:

The program \'javac\' can be found in the following packages:
 * default-jdk
 * ecj         


        
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6条回答
  • 2021-02-07 00:04

    just copy and paste on your Terminal

    sudo apt install openjdk-8-jdk-headless

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  • 2021-02-07 00:09

    Actually, java command was working on my ubuntu 16.04 but not javac. At first, I fiddled around with the environment paths and all as i thought i had all java packages installed and the issue was with setting the environment path variable.

    Then i tried the command update-alternatives --list java which returned a path but update-alternatives --list javac did not. This explained to me that javac needed to be installed so I ran sudo apt-get install default-jdk

    But incase you get a path in running the update-alternatives --list javac then i suggest you should try setting up your $JAVA_PATH or creating symbolic links. Help to that can be found on the page unable to run javac on Ubuntu.

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  • 2021-02-07 00:19

    In my case, I had the JDK installed, but I'd installed it manually so it wasn't added to the path. Once I added these lines to my .zshrc file (I'm using zsh; if you're using bash, add them to .bash_profile) and relaunched the terminal, it worked:

    # Java environment variables
    export JAVA_HOME='/opt/jdk/jdk1.8.0_241'  #change accordingly; this needs to match your JDK's location!
    export PATH=$PATH:$JAVA_HOME/bin
    
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  • 2021-02-07 00:21

    As mentioned by @Blorgbeard you most likely do not have a Java JDK (Java Development Kit) installed. See this web page for more information about the various versions of Java available for Ubuntu.

    The following command will install the OpenJDK version of the Java JDK:

    apt-get install default-jdk
    
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  • 2021-02-07 00:22

    I have Ubuntu 12.10, with java "1.6.0_27", this command makes javac available:

    sudo apt-get install default-jdk
    

    Then compile it like this:

    el@apollo:~/retreat3$ javac HelloWorld.java
    el@apollo:~/retreat3$ java HelloWorld
    Hello, World!
    
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  • 2021-02-07 00:24

    I was having the same problem. I used the following command

    sudo apt-get install openjdk-7-jdk

    The app compiled after that. Not sure what the difference is to the above solutions. Maybe I wouldn't of had to specify a version.

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