I am using java extension pack by Microsoft in vscode.
Whenever I click on run or debug the .class file in created in some different folder which is hard to track.
This is what happens when I click on run java
e:; cd 'e:\DAA_JAVA\lab_internal'; & 'c:\Users\User\.vscode\extensions\vscjava.vscode-java-debug-0.35.0\scripts\launcher.bat' 'C:\Program Files\Java\jdk-16.0.1\bin\java.exe' '--enable-preview' '-XX:+ShowCodeDetailsInExceptionMessages' '-Dfile.encoding=UTF-8' '-cp' 'C:\Users\User\AppData\Roaming\Code\User\workspaceStorage\8f978c532d0fff698dd5ae65e10feb26\redhat.java\jdt_ws\lab_internal_a739e7\bin' 'Mergesort'
I request the open community to help me to create the .class files in the same folder where my .java file is contained.
Thank you
I guess you are developing in a project without build tools (no Maven/Gradle)
In that case, you can use the setting java.project.outputPath to set a relative path of the output folder
Note: this setting only works in the WORKSPACE scope, please do not set it in the USER scope.
I am new to Java and JNA. I was trying to access the native interfaces of a third party applications using JNA from Java eclipse. So I was trying to set the jna.library.path from Command line using the command
java -Djna.library.path=<path to your library> MainClass
I have given the "path to your library" as the path of the folder where my .dll file and its dependencies are there. for ex: D:Adrin\Library\Dll.
"MainClass" I have given the name of the class with main() in my application(Jnaexe.java). But an error occurs saying
Error: Could not find or load main class Jnaexe.java
I have also tried by giving the package name and also the whole path of the Jnaexe.java. Still it does't work. I tried running from the src folder and even the folder where Jnaexe.java file is there(example folder) in command prompt. But the error was same.What I am missing here. Any help will be highly appreciated. Thank you in advance
I am trying to run my Java program but getting an error about a .so not existing.
I have specified the libs folder by using -Djava.library.path=libs and -DLD_LIBRARY_PATH=libs
As a result, when I run the file the console spits out the correct path of the file but says No such file or directory.
It's frustrating because the file does exist.
I have also tried running the application as sudo with no luck.
How can I get Java to recognise that this file does indeed exist?
Try explicitly setting the java.library.path explicitly in the code, this has sometimes worked for me where command line flags have failed
System.setProperty("java.library.path", path);
or try setting the path explicitly, in quotes
-Djava.library.path="/full/path/to/lib-folder"
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..
I am trying to read a text file in eclipse, I have "run configurations" -> arguments set in eclipse , but it always says
Exception in thread "main" java.io.FileNotFoundException: file.txt (The system cannot find the file specified)
I have put file.txt under the same folder of myclass and in /bin folder
What else I should look into?
Thanks
Set the working or starting directory in the run configuration, then put the file in that directory.
Put it in the folder of the project, not in bin folder. If you want to see what is the base path of the files, you can print:
System.out.println(new File(".").getCanonicalPath());
If you need to read a file from within an Eclipse plugin you are creating, you should treat at as a resource. Check this for an example: http://www.vogella.de/blog/2010/07/06/reading-resources-from-plugin/ Hope that helps.