Aug 24, 2020 Get file path of a file (NIO Path). For java.nio.file.Path, we can use the following APIs to get the file path of a file. Path.toAbsolutePath – Full file path. Path.toRealPath ) – For symbolic links or resolving the. Symbols in the path name, default it follow link. Get file path of a file (NIO Path). For java.nio.file.Path, we can use the following APIs to get the file path of a file. Path.toAbsolutePath – Full file path. Path.toRealPath ) – For symbolic links or resolving the. Symbols in the path name, default it follow link. That’s precisely what we are going to discuss today. We will explain how to reveal file path in the Finder on Mac to know the exact location of a file or folder that you are viewing currently (If you wish to copy file/folder path from Mac finder, jump here.) The process is quite simple and will take little more than a couple of steps.
The shell path for a user in macOS is a set of paths in the filing system whereby the user has permissions to use certain applications, commands and programs without the need to specify the full path to that command or program in the Terminal.
So instead of running something like this, with a path to the command or script:
You can just type the command, regardless of where you are in the filing system:
Your shell path is a bunch of absolute paths of the filing system separated by colons :
You can find out whats in your path by launching Terminal in Applications/Utilities and entering:
And the result should be like this..(the last one when you have Xcode)
So this is stating that you can run Unix style applications or commands located in 5 or 6 default locations of a certain path in the filing system:
- /usr/local/bin
- /usr/bin
- /bin
- /usr/sbin
- /sbin
- /Library/Apple/usr/bin (If you have Xcode)
These directories are not visible by default in the filing system but you can make them visible.
Adding a Temporary Location
You can add extra locations to your path, in the myscript.sh example above it’s location /Users/yourusername/bin/ which is not in the default path, you can add it in Terminal like so:
So here I have copied my existing path and added the new location on the end, colon separate the paths. Test it by running echo $PATH again in the Terminal.
One of the disadvantages of this is that the new location will only be honored for that particular Terminal session, when a new Terminal window is launched it will have the original default path again.
Adding in a Permanent Location
To make the new pathstick permanently you need to add or edit a .zshrc file in your home directory and add to the path there.
This configuration file controls various Terminal environment preferences including the path.
In macOS Big Sur and Catalina the default shell is Zsh aka the Z Shell (previously it was the Bash Shell).
This command moves you into home directory, if you are already in the home directory then you are in the right spot. Check you have a .zshrc file by running the ls -la command which shows the directory files.
If you don’t have it, create it and edit it with a command line editor called nano:
If you do have it just edit it:
Add in the above line which declares the new location /Users/yourusername/bin as well as prefixing the original path declared as $PATH.
File Path In Mac For Java Pdf
Also if you have an existing .zshrc file it may have these lines in it:
Just uncomment the second line
Add in any extra paths colon separating them with no trailing slash
Saving the Edits in Nano
Save the file in nano by clicking ‘control’ +’o’ and confirming the name of the file is .zsh by hitting return. And the ‘control’+’x’ to exit nano.
Either refresh the .zshrc file by using source or restart the Terminal:
So now when the Terminal is relaunched or a new window made and you check the the path by
You will get the new path at the front followed by the default path locations, all the time
Rearranging the default $PATH
If you needed to rearrange the paths in the default $PATH variable, you can just do that and leave off $PATH.
So lets say you want /usr/local/bin at the beginning to take precedence you can add the default path like so inside .zsh
And then you can slot in other paths as required.
Java and the Mac OS X Terminal
This page is obsolete.
This document instructs you on how to use the Mac OS X Terminal with Java.
You will use the Java compiler javac to compile your Java programs andthe Java interpreter java to run them.To verify that Apple's implementation of Java 2 Standard Edition (Java SE 6) isalready installed:
- Run Software Update.
- Run Applications/Utilities/Java/Java Preferencesand verify that the Java SE 6 - 64-bit entry is checked andfirst in the list; if not, drag to change the preferred order.
You will type commands in an application called the Terminal.
- Open a terminal window. You can find this underGo -> Applications -> Utilities. Drag the Terminal to your dock sinceyou will be using it frequently.
- You should now have a Terminal window somewhere on the screen.It will have a prompt that looks something like:
- To check that you are running the right version of Java, typethe commands in boldface below. You should see something similar to the information printed below. The importantpart is that it says 1.6 or 1.5 (and not 1.4).
Then type
- Since you will be using the Terminal frequently, you may want tocustomize the default window settings (e.g., Monaco 13pt font with antialiasing).
- To check that you are running the right version of Java, typethe commands in boldface below. You should see something similar to the information printed below. The importantpart is that it says 1.6 or 1.5 (and not 1.4).
You will use the javac command to convert your Java program into a form moreamenable for execution on a computer.
- From the Terminal, navigate to the directory containing your .javafiles, say ~wayne/introcs/hello, by typing the cd commandbelow.
- Assuming the file, say HelloWorld.java is in the currentworking directory, type the javac command below to compile it.
If everything went well, you should see no error messages.
- Assuming the file, say HelloWorld.java is in the currentworking directory, type the javac command below to compile it.
File Path In Mac For Java Programming
You will use the java command to execute your program.
- From the Terminal, type the java command below.If all goes well, you should see the output of the program -Hello, World.
| Input and Output |
If your program gets stuck in an infinite loop, type Ctrl-c to break out.
If you are entering input from the keyboard, you can signifyto your program that there is no more data by typingCtrl-d for EOF (end of file).You should type this character on its own line.
When I try to run java I get: Exception in thread 'main' java.lang.NoClassDefFoundError.First, be sure that HelloWorld.class is in the current directory.Be sure to type java HelloWorld without a trailing .classor .java.If this was not your problem, it's possiblethat your CLASSPATH was set by some other program so that it no longerincludes the current working directory.Try running your program with the command line
If this works, your classpath is set incorrectly.I get the error 'class file has wrong version 50.0, should be 49.0' when I compilefrom the Terminal. What does this mean?It's probably because DrJava is configured to use Java 6.0 and and your Terminal is configured to use Java 5.0.To change the default version of Java in your Terminal, launchJava Preferencest. Drag the Java SE 6 - 64-bit entryto appear first.
How do I get the menu to display at the topof the screen instead of at the top of the frame?Execute with java -Dapple.laf.useScreenMenuBar=true
File Path In Mac For Java Program
Where can I learn more about the command line?Here is a short tutorial on thecommand-line.