I created two java files: Pizza.Java and PizzaOrder.Java.
I tried compiling my code using javac in the command prompt like this:
javac pizzaorder.java
I am getting access is denied error:
C:\Users\Meutex>cd\
C:\>cd "Program Files\Java\jdk1.7.0\bin"
C:\Program Files\Java\jdk1.7.0\bin>javac PizzaOrder.java
PizzaOrder.java:23: error: cannot find symbol
Pizza order = new Pizza ();
^
symbol: class Pizza
location: class PizzaOrder
PizzaOrder.java:23: error: cannot find symbol
Pizza order = new Pizza ();
^
symbol: class Pizza
location: class PizzaOrder
2 errors
C:\Program Files\Java\jdk1.7.0\bin>javac Pizza.java
Pizza.java:11: error: error while writing Pizza: Pizza.class (Access is denied)
public class Pizza {
^
1 error
C:\Program Files\Java\jdk1.7.0\bin>javac Pizza.java
What am I doing to cause this error?
It appears that you're trying to put your source files in the system C:\Program Fiels\Java\jdk1.7.0\bin directory. Try making your own directory for your source files (under your own home directory), instead of putting them in the system path. You probably don't have permissions to write to that directory (but I'm not sure how you got your source files there).
The Access Denied error is most likely due to the fact that you're trying to compile this program within the jdk directory, which is inside \Program Files, which is NOT universally writeable by users. You should be doing your coding elsewhere (perhaps in your My Documents directory, or at least somewhere you've got write permissions).
You don't have permission to write in the directory. You shouldn't put your source code in the bin directory of the JDK.
Instead, add that bin directory to your PATH and create a work directory in your user home folder.
See How to set the path in windows 7.
I know this has no relation with Java, but try it, it worked for me.
I realized it while I was playing with windows explorer.
Goto C:\Program Files\
Right click java folder, click properties. Select the security tab.
There, click on "Edit" button, which will pop up PERMISSIONS FOR JAVA window.
Click on Add, which will pop up a new window. In that, in the "Enter object name" box, Enter your user account name, and click okay(if already exist, skip this step).
Now in "PERMISSIONS OF JAVA" window, you will see several clickable options like CREATOR OWNER, SYSTEM, among them is your username. Click on it, and check mark the FULL CONTROL option in Permissions for sub window.
Finally, Hit apply and okay.
This should be it. You will now be able to compile as well as run your java programs right there in the bin, instead of doing other things.
Only thing you need to do is to run your cmd as administrator. So right click on cmd and run as administrator. That should solve your problems!
U need to set ur path in ur computer.first copy of ur bin path(c:/programfiles/java/jdk1.7/bin) then go to ur computer properties->advanced system settings->Environment variables then click new then type path in name and paste it with semicolons front and back(;c:/programfiles/java/jdk1.7/bin;).... then it will run.....
Solved in easy way Just run cmd as "Administrator"
If u are using IDE like Netbeans or Eclipse there no problem at all..
Related
I am currently making a java file in a folder named "C:\Users\acer\MEGA\MEGAsync Uploads\Second Year\First Semester\Data Structures and Algorithms\Genetic Algorithm" in VSCode. However, when I hit Run, an error forced me to add the parent folder "Data Structures and Algoritms\Genetic Algorithm"
to Java source path but I can't do it anymore because I need to use pom.xml to manage source directory.
When I hit F5, the path is different, too.
& 'C:\Users\acer.vscode\extensions\vscjava.vscode-java-debug-0.23.0\scripts\launcher.bat' 'C:\Program Files\Java\jdk-11.0.4\bin\java' '-agentlib:jdwp=transport=dt_socket,server=n,suspend=y,address=localhost:57237' '-Dfile.encoding=UTF-8' '#C:\Users\acer\AppData\Local\Temp\cp_4z7lhy5oaj57rxbrd3o9wonul.argfile' 'GeneticAlgorithm'
How to fix these errors?
Here are the steps to follow to configure java in vs-code https://code.visualstudio.com/docs/languages/java.
Compiling and running a java program is very easy after JDK installation(https://www.guru99.com/install-java.html). Following are the steps:
Open a command prompt window and go to the directory where you saved the java program (MyFirstJavaProgram.java). Assume it's C:.
Type 'javac MyFirstJavaProgram.java' and press enter to compile your code. If there are no errors in your code, the command prompt will take you to the next line (Assumption: The path variable is set).
Now, type ' java MyFirstJavaProgram ' to run your program.
You will be able to see the result printed on the window.
javac HelloWorld.java
Following error message keeps coming out every time when I run in cmd
javac: file not found: HelloWorld.java
However, when I added my file location
javac D:\User\Documents\Project\HelloWorld.java
It runs successfully.
Why?
I have tried to edit variable value of PATH to D:\User\Documents\Project
But it did not work.
You seem to have never used the command prompt before. The command prompt has a "current directory", just like in a file explorer window, there is a "current directory", the directory that you are viewing right now.
The current directory is usually shown just to the left of the caret.
The current directory on the above photo is C:\Users\Mrhope.
Type dir to see all the files and directories of the current directory. You can then use cd to navigate to a subdirectory. Say you are in Documents now, and you can do this
cd Project
to go to the Project folder. By the way ../ means the parent directory
The HelloWorld.java in javac HelloWorld.java is a path relative to the current directory, so this will only work if HelloWorld.java is in the current directory. You should try to use cd to navigate to the correct directory then use that command.
Setting the PATH environmental variable is quite irrelevant here because that is setting the path of the JRE. Please set it back.
I suggest you learn the basics of cmd first. Many tutorials are available online.
You have to enter the directory of where your Java file is.
Fastest way is to open the folder where your Jar file is then hold the shift key on your PC and right click on an empty space in the folder (while still holding the shift key). When the context menu comes up look for the open command window here option (for newer Windows 10 versions it's power shell window), select the appropriate option. When it opens run your command
So, I've been trying to create a resource folder/directory for my java project in Intellij IDEA. For some reason I can't actually get this to work.
So now I go to create a directory under my helloworld package
and this error message shows up "failed to create directory (x location)"
but I go to check my folder where all my other stuff for the project is stored, and there is a folder there with the exact same name. Anybody got any idea what's going on here?
(I'd post pictures but apparently I need 10 reputation?? which I don't have. Sorry.)
before i same ploblem
in my case, i use, Option on a right-click menu of a program icon that, when selected, allows the program to run with full administrator privileges.
after working
my os windows 10
javac not working in windows command prompt
^I tried the suggestions on this post, and it was SLIGHTLY helpful, but not completely.
I opened up my command prompt and I typed in "javac" after putting in the path in my Environment Variables and it didn't work, at which point I googled it and found that thread.
I knew that I had closed and re-opened my cmd already, and that didn't work, so I skipped that bit and I saw the part telling me to make sure that javac.exe exists, which I verified with the "dir" command in the cmd. Afterwords, while in the "C:\Program Files\Java\jdk1.7.0_25\bin" folder on the command prompt, I typed in the next bit of advice, which was
for %i in (javac.exe) do #echo %~$PATH:i
After entering this into my command prompt, I got the message "ECHO is on". Upon seeing this, I typed in "javac" again and this time, it worked. So I decided to test this out by backing out of the directory and going to a folder in which I had a .java file saved and running it, but it again told me that
'javac' is not recognized as an internal or external command, operable program or batch file.
This was disappointing. I think it'll only work if I'm INSIDE the bin file on the command prompt, which is annoying because I'm not an administrator on this computer and it will be annoying to always have to get admin permission (from my parents) to code. They will also never give me the password. Can anyone help me? Thanks in advance! And sorry for the huge wall of text...
EDIT: Someone has asked what would the output of "echo %path%" be. It is this:
C:\Windows\system32;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\
^Is it not supposed to say this?
EDIT 2: #brano88...I think I did? I right clicked computer, went to properties, went to advanced system settings, clicked Environment Variables and went to the top part and pressed "New..." There, I entered the Variable Name as Path and the Variable Value as the location of the bin folder. Is this incorrect? I followed a YouTube tutorial step by step while doing this.
This one: http://www.youtube.com/watch?v=Hl-zzrqQoSE
How to run .java files from CMD
go to your Computer -> C: -> Program Files -> Java -> jdk1.7.0_25-bin
copy the path (example: C:\Program Files (x86)\Java\jdk1.7.0_25\bin)
Go to Control Panel -> System and Security -> System-Advance System
Settings -> Advanced -> Environment Variables
open the Environment Variables screen and go to System Variables and look for "Path"
after finding the Path system variable, double click it or press edit button and in the Variable value you paste the path from java you just copied after the last values already existing there.
Note!
make sure you DO NOT enter any extra space in this field as it won't work;
make sure you have one semi-colon before pasting the path, example: Path :
...%ANT_HOME%\bin;C:\Program Files (x86)\Java\jdk1.7.0_25\bin
Note! If you previously tried to compile the .java file in a CMD, close that CMD
and open it again as the changes made will take effect only using a new instance of CMD
Go to the location of the file.java , example:E:\Projects , right-click by holding the Shift button pressed inside your folder and in the options from the window that just appeared select: Open command window here
Another solution is to normally open a CMD and change the directory using :
cd command until you reach your folder
After the CMD window opened, type: javac HelloWorld.java
Note! Make sure the class name written in your file.java is the same as the file name. Example your file name should be: HelloWorld.java and your class inside that file must also be:
class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello World!"); // Display the string.
}
}
Otherwise, it will not compile!
It is successful if no error message is displayed, if the path of the folder appears again in CMD and of course if the HelloWorld.class file appears now in the directory. To check that type the command dir which will show what contains your currect directory.
To finally run the file type in the CMD: java HelloWorld
Observe that no extension is needed when running the file(the file you run already has the .class extension)
This is how it worked for me! If something is not right, please inform me! Thanks!
For a beginner programmer that doesn't have admin rights on his/her computer, I'd recommend the Eclipse IDE.
Since you already have the JDK the only installation step needed requires no admin rights. From here you must download the "Eclipse Standard" option, and you will get a very large zip archive. You can extract it onto the desktop or my documents. Windows comes with a utility to do this via drag-and-drop right from the explorer or your machine may have another program such as WinRAR installed to do this.
You can then run eclipse.exe from the place where you extracted it by browsing to, and double-clicking this file.
The IDE is very powerful and self-explanatory. You can create projects, run, and debug code, and it's nice for beginners. It's truly worth the long wait in downloading it.
First, yes you did add JDK to PATH. But you didn't do that correctly. You already have these variables added to PATH: C:\Windows\system32;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\
To add JDK put semicolon before you add it because you have multiple path's assigned to PATH variable. So it should be something like this:
C:\Windows\system32;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Java\jdk1.7.0_25\bin
in my case, javac was not working just because while specifying the path to javac in the path variable I gave space after putting semicolon to the end of the previous entry
To use javac from command prompt without typing the full location each time you will need to add it to the path.
I am unsure if you can change it without admin privileges, But on windows 7 with admin you can go to start -> Right click My Computer -> Properties -> Advanced system settings -> Advanced -> Enviromental Variables
You can then find the system variable path and append to the end of it, the location of javac.
The exact location of javac will vary depending on what version of the JDK you have installed, During installation you will have been given the option to choose where it was installed.
EDIT: Also make sure you haven't opened cmd as administrator. Or perform the steps in that video on the administrator account.
Adding variables to the top part of the environmental variables menu, mean they only affect the current user. You should be able to do these on normal account if you have someone type in the administrator password.
I can run my project through netbeans but after I make a jar file and double click it I get the error cannot find Java runtime environment? I am on Windows.
You don't have a file associate created. Right click on the .jar file in Internet Explorer, select Open With, and navigate to your JRE. Select the java.exe executable, and make sure the command-line argument has ' -jar ' present.
The .jar file will be passed as the first argument to the JVM.
Make sure you have JRE installed.
Open the console and type java -version
You should download a Java runtime environment.
You might try, as Chris said, making sure the JRE executable is part of your PATH environment variable. Check out "4. Update the PATH variable (Optional)" from this guide.
Make sure the JRE bin dir is in your PATH env variable.
It's all about the Manifest - http://java.sun.com/docs/books/tutorial/deployment/jar/manifestindex.html
In Netbeans run the project. It will ask you what class to run (you will see a list of all the classes with a "public static void main(String[])" method). Once you do that the next time you build the class netbeans will show you how to run it (with the -jar witch). Now you should be able to double click on it.