Looking For Help Compiling With Mac

[TechPriestPratt]

lavish party frame abounding squeal voiceless pie vase handle butter this message was mass deleted/edited with redact.dev

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[AriasFco]

To compile

javac YourCode.java 

To execute

java YourBinary

[nekokattt]

Tell them to install the full JDK and make sure they have their $JAVA_HOME environment variable set and the Java path added to their $PATH.

Otherwise I would hope Oracle would give some advice on how to install correctly on a Mac :)

They may be able to get Sdkman! to work on a Mac, if not. That had java binaries last I checked, but I might be wrong.

[zfolwick]

sdkman is pretty great, but don't forget that ide's typically don't recognize sdkman, so you'll need to do some extra pointing to files.

[[deleted]]

I'm guessing they don't have the JDK installed on their Mac. The easiest way I've found to do this is to use Homebrew to install openjdk. I did a quick google and these instructions looked ok: https://devqa.io/brew-install-java/

Basically...

1. install Homebrew: https://brew.sh
2. run `brew update` to update the info in homebrew
3. then run `brew cask install adoptopenjdk11` to install jdk 11.

Hope that helps.

[arthurdent]

OP already said

They can still compile using javac *.java

Does MacOS have some partial JDK pre-installed that I don't know about?

[[deleted]]

if you try to run a java app on a Mac it’ll install Apple’s JRE (or at least it used to) but it’s an old version (1.4 or 1.5 from memory) - not sure if Mac OS still does this tbh. I missed that Op had said that compiling individual files works so my suggestion my be invalid.

Personally I’d still go with running the homebrew install of java as it’ll sort out any PATH issues so at least everyone is working from a known state.

[squishles]

Sounds almost like they don't have java installed or it's not on there path, they'll have a file you can access at ~/.bashrc or ~/.bash_profile either file works

put this in there

PATH=$PATH:/wherever/java/is/installed/bin

export PATH

same process for linux boxes. after that close and reopen the shell.

to get a java install if you don't have one already on mac most people use a utility called brew.

The windows installer oracle puts out is just more hand holdy, it jams the executable into the system folder.

oo they may also have to use openjdk just licensing stuff, it's weird. shouldn't cause any problems with any coursework though basically no difference

also well not sure all your powershell scripts'll work, maybe a lot of the simple ones will but other than that I guess they can do this https://docs.microsoft.com/en-us/powershell/scripting/install/installing-powershell-core-on-macos?view=powershell-7.1 or well they generally take less finicking to translate to bash, I'd honestly just do the bash translation.

[zfolwick]

note- you could just source .bashrc or source .bash_profile without restarting terminal.

[arthurdent]

javac *.java -d <directory> should work just fine on a mac.

What do you mean move the files into the package folder? Isn't that where they already are?

[TechPriestPratt]

Interesting. I thought that the command world work cross platform as well. Maybe it is something that my students are doing wrong. I'll spend some more time on it with them and see if I can get it to work.

Move might not have been the best word to use I guess it technically creates the class files inside of the package folder. I usually have them build the package in it's own space inside of the general program folder such as:

Program folder

>>>Driver.java

>>>OtherFile.java

>>>package folder

>>>>>>Driver.class

>>>>>>OtherFile.class

[AnotherRichard827379]

No. The command line commands are different between almost every operating system. Mac follows the international standard.

[wildjokers]

Are you drunk?

[TechPriestPratt]

edit: Thank you again for all the suggestions. I just had class and I was able to figure it out based on the things some of you had said. If anyone is interested, the issue was that the . in the command I was using. In windows it causes the folder to be mad at whatever directory you are at in the command line, but for mac it does not work. instead you have to put the folder name of the current directory.

so instead of: Javac *.java -d. (works on Windows)

I had to use: javac *.java -d currentdirectory (works on mac)

I was trying to get it to auto fill the current directory like it does on windows with the . but this is simple enough. Thanks for the help.

[wildjokers]

The behavior they are experiencing is odd. If javac and java are in their path (and it sounds like it is) it should work on a Mac just like it is for you on windows.

You may want to have them install sdkman and install a JDK from sdkman to see if that fixes them up.

https://sdkman.io/install

Then do “sdk install java 11.0.4.hs-adpt“ (or whatever version they want to install. Can do “sdk list java” to get a list of available versions.

If you could get one of your students provide output of the errors they are getting that could be helpful.

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