In visual studio code. my code is not running properly. There is no syntax error or any error but it is not running. please tell me the solution. it will really appreciated. java path is also ok.
i had tried all possible outcomes but terminal is only showing error could not load main class, caused by java.lang.classnotfoundexception: javabasics.java
In java, the name of the class must be consistent with the file name
Try to modify the file name or class name
Maybe it's not because of Top-level
Related
So recently I was bombarded with the below error.
I have a very bad understanding of Java and how the internal memory location and file compiling work. So, when I ran my program(every program gave me the error so I guess it doesn't matter which program I ran and for that matter, I didn't include it here), it started giving me this error. I looked if there were any errors with my classpath and working directory, but still, after applying those too it didn't help much, and I still got the same errors.
The programs ran from the terminal using commands but from the normal "Run" function, it gave me this error.
I just restored the default setting of the IDE and it now works.
The difference I found was that after restoring the default settings, the project location was the default folder- IdeaProjects- whereas when I encountered the error I used to set my own location for the projects. Is it due to this? I had the same kind of problem in eclipse when I set the location of the project outside of the eclipse workspace.
Is the location of the project simply the reason I got the below error and if so why? I just don't understand how the internal mechanism of the whole programming thing works. About the directory, memory allocation, etc. Can anyone provide some decent materials after which I can be at a stage where I can separate what is the error and why is it causing or why the program doesn't run?
Full error:
/Library/Java/JavaVirtualMachines/temurin-17.jdk/Contents/Home/bin/java -javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=57983:/Applications/IntelliJ IDEA.app/Contents/bin -Dfile.encoding=UTF-8 -classpath /Users/(myname)/Desktop/Folders/College/2nd sem/CS 2/Labs:projects/Lab3/Lab3dot34.0/out/production/Lab3dot34.0:/Users/(myname)/Desktop/Folders/College/2nd sem/CS 2/Labs:projects/Lab3/Lab3dot34.0 Main
Error: Could not find or load main class Main
Caused by: java.lang.ClassNotFoundException: Main
Initially, I tried to view the working directories and add/change the classpath from the project structures like every suggestion found on the internet but still, the error existed.
I created a new java project in eclipse. This is the first time I am using it.
After creating java files.
I tried running a java file by right clicking->Run As-> Java Application
It showed the error :
Error: Could not find or load main class ISBN
Caused by: java.lang.ClassNotFoundException: ISBN
What could be the reason for this error? How do I fix it?
[screen shot of project and error message in eclipse ide][1]
i have already made and tested a snake game in java.A siple GUI development using swing.It was running pretty fine
But when i went to create a runnable jar file i found that the classes were included in the java default package.So what i did was make a new project and copy the used resources and class.But this is the error message that shows up.
As you'll can see main is already defined in the Game play class(reffer to the image) ,hence i coudlnt think of a reason why this error message would show.
I tried changing the workspace as well but in vain,and furthermore now on running the application(with warnings ofcourse) the used resourses woulnot load!
Totally in a mess!!
could the community kindly help me fix it?
if the image is not visible try this link
https://i.stack.imgur.com/NF34x.jpg
Did you remember to include a package declaration? Remember, in order to run a java program that is inside of a package, you must include a package declaration.
I am student currently trying to make a game in java. However I can't seem to run the project with the IDEA IDE. I am getting the message: "Exception in thread "main" java.lang.ClassNotFoundException: kamikaas.game.World" But when I look at the class structure I can't see why it wouldn't find the class. You can see the class structure and message here
It is probably an entry point issue. Make sure you set the entry point to your main class (the class with main method).
After you edit: As I guessed, your World class doesn't have a main method. You have to start your project with the correct class.
Ok, got a working project now, I added Maven to my project and it fixed my problem. As for the entry point suggestion, I have looked numerous times and it was correct. I don't know what the cause was but I don't care if it doesn't exist anymore.
I am new to Java and started with Eclipse Kepler Service Release 1. I started a small project that contains two classes, each in its own file:
MIDI_Wrap_Test - a main (program) class
MIDI_Wrap - another class (MIDI_Wrap) which is intended as a MIDI wrapper. -
Both classes are in the same directory with file names being the same as the class name (with .java added of course). Something goes wrong and I want to debug it. However, when control transfers from the main program to the MIDI_Wrap file/class I get the error message 'source not found'.
I found out that this is a quite common error. The question and answer that seem to mirror my problem perfectly is found here. I added the project to the debug source path, noticing that the correct directories were already added but to no avail.
I must be doing something wrong but am not able to find out what. Can someone help me out of this?
I solved by shutting down eclipse and reopened it. This solved me, and code can be debug with source code view.