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File Path In Mac For Java

File path in mac for java code

Historically, computer systems have offered two very differentkinds of user interface: a command-line based interface, and a graphicalinterface (GUI). In the former, users interact with the computer systemby issuing commands - e.g. in the command language used on Unix systemsa file called 'foo.bar' might be deleted by issuing a command like the following:

File Path In Mac For Java Download

On Linux, Mac OS X and other.nix flavours, the folder separator is / not, so there isn't any need to escape anything, some/path/of/folders. Also, you can use the /tmp folder for your temporary files. Jul 01, 2019 Java keytool/keystore FAQ: Can you share some Java keytool and keystore command examples? As a little bit of background, in creating my 'Hyde (Hide Your Mac Desktop)' software application, I decided to venture into the world of commercial software, selling my app for a whopping 99 cents.

rm foo.bar

while on a GUI system the file might be deleted by dragging its icon tothe trash can.

Modern desktop computer systems often make both interfaces available tothe user. The graphical interface is typically what computer users learnfirst, because it is simple and intuitive. However, being able to usea command-line interface is important for skilled users, for at least tworeasons:

  1. It may be the case that there are certain tasks which can only beperformed by using the command-line.
  2. For certain kinds of tasks, using the command line is quicker andeasier.

This document is intended to introduce the use of the command-line interfacefor users who are already familiar with a graphical user interface. Theexamples will be specific to the computers in our Macintosh lab, running OS-X, which offers a full-featured Unix command-line interface through the Terminalapplication. However, the principles are equally applicable to other commandline interfaces, such as that presented by Linux or the DOS interface ofWindows.

File Names and Paths

Regardless of the interface that is used, every file on the computer can beuniquely specified by giving a path specification that includes thename of the file and enclosing folders (directories). If the file is locatedon a removeable or network volume, the path also includes information aboutthe volume on which it is located.

For example, suppose a user in our lab mounts a network volume named 'aardvark' that contains a folder named 'cs211', which in turn contains a folder named 'lab1', which in turn contains a file named 'Lab1Main.java'. Then the full name ofthat file would be:

/Volumes/aardvark/cs211/lab1/Lab1Main.java

In the graphical interface, one would follow this path by opening the iconfor the volume 'aardvark' on the desktop (where all the icons for mountedvolumes appear), then opening the 'cs211' folderwithin it, and then opening the 'lab1' folder within that - which would resultin the Lab1Main.java icon becoming visible. On the command line, one wouldspecify this path by literally typing the full name given above - or by usingone of the shortcuts to be discussed shortly.

The Current Directory and Relative Paths

It should be evident that having to type the full path for a file every time onewanted to access it from the command line could quickly become an unpleasant anderror-prone process. One important way around this is the notion of a 'currentdirectory'. When interacting with the operating system through the command-lineinterface, there is always a current directory. If one types a pathwithout preceeding it by a '/', the path is taken as being relative tothe current directory. For example, suppose the user's current directory were thelab1 directory (/Volumes/aardvark/cs211/lab1). Then if the user were to typea command specifying Lab1Main.java, that would be interpreted as relative to thecurrent directory, and would be equivalent to the full path of the file: /Volumes/aardvark/cs211/lab1/Lab1Main.java. (The latter full path, which beginswith a '/', is called an absolute path.)

There are, then, two important principles of interpretation of a file specificationtyped on the command line:

  1. If the file specification begins with a '/', it is taken as an absolutepath specification beginning from the root of the directory structure on the machine.If it does not begin with a '/', it is taken as a relative path, andcurrent directory specification is added at the front of it to produce a completepath.
  2. The meaning of a relative path always depends on the identity of the current directory. For example, if the current directory were the cs211 directory on aardvark, then the file we have been using for our examples would have to be specified by the relative pathlab1/Lab1Main.java, since lab1 is not part of the current path.

In addition to the relative path specification form we have considered, it is alsopossible to use '../' in a relative path. The occurrence of '..' means 'go up(backwards) one level in the path'. For example, suppose the aardvark volume alsocontains a folder called cs112, which contains a file called 'paper.txt'. Then,if the current directory were /Volumes/aardvark/cs211, it would be possibleto refer to paper.txt in either of the following ways:

../cs112/paper.txt
or
/Volumes/aardvark/cs112/paper.txt

Path Completion

Even though relative paths can save typing, there is still the matter of typing adirectory or file name correctly - even a one character error, including acapitalization error, is enough to mess up the specification. To save typing,it is usually possible, while typing a file name on the command line, to pressthe tab key - and if the word that is currently being typed can be unambiguouslyexpanded (i.e. only one directory/file in the current directory begins withthe letters typed so far) then the command interpreter will complete the nameby typing the missing characters.

For example, if one were trying to type the complete path to Lab1Main.java, itmight be possible to proceed as follows:

Type /V then press tab. The system completes this to /Volumes/.Now type aa, then press tab. The system complete the partial path to/Volumes/aardvark/. Now type cs2 (c or cs alone would be ambiguousif there were also a cs112 folder on the volume). Pressing tab would cause this to becompleted, yielding /Volumes/aardvark/cs211/. At this point, one might typelab1/Lab1M and press tab, which would complete the path: /Volumes/aardvark/cs211/lab1/Lab1Main.java.

Some Useful Command-Line Commands

The following are some command-line commands you will likely find useful:

File Path In Mac For Java Tutorial

  • cd path - change the current directory.
    Example: to make /Volumes/aardvark/cs211/lab1 the current path, youcould type
    cd /Volumes/aardvark/cs211/lab1
    The path that is specified can be either absolute or relative - e.g. if yourcurrent directory were /Volumes/aardvark/cs211/lab1, then the followingcd command would make the working directory be /Volumes/aardvark/cs111:
    cd ../../cs111
  • ls - list the contents of the current directory.
  • ls path - list information about a specific file or directory anywhere on the system.
  • rm path - remove (delete) a file.
  • javac path - compile a java program. The currentdirectory must be the root of the package tree. (Note: the file must bea java source file - hence the end of the file name specified in the pathwill the '.java').
  • java path - run a previously compiled java program. The currentdirectory must be the root of the package tree. (Note: the file mustbe a java class file - but you do not include '.class' in the path!)
File path in mac java

Finder on Mac is one of the most comfortable ways to get around your Mac and navigate through files and folders. Besides the essential functions that you see in the Finder, there are specific handy tools that can ease your file and folder navigation further.

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. To make it even simpler, we have prepared the guide with steps and images to help you out, cruise around.

How to Show File Path in Finder on Mac

Step #1. Open the Finder first.

Step #2. Now from the Finder menu at the top, click on View.

Step #3. All you need to do now is to click on “Show Path Bar.”

Now you can see a small bar pops-up at the bottom of the Finder.

Step #4. To make sure everything was done right, navigate through different folders and notice the path being displayed in that bar.

If you ever wish to hide the path again, Simply click on “Hide Path Bar.”

View Full File Path in Finder on Mac Using Keyobard Shortcut

File Path In Mac For Java

Viewing a File path is even more easy using a Keyboard shortcut. Open Finder → Use the combination of Option(⌥) + Command(⌘) + P.

That’s all for now!

Signing off

File Path In Mac For Java Code

This feature didn’t need any technical know-how, and it should have been available to all Mac users by default instead of manually doing it. But maybe Apple had some other thoughts on it. Now that you know it, make sure you use it and reduce the stress of memorizing file path.

You may like to refer:

Should you have any issue following this guide, make sure you comment below or get in touch with us.