Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. On adding a new Java file into an existing project and clicking on the Run or Debug text at the top of main function results in ClassNotFoundException. Same issue also happens when manually adding the mainClass entry in the launch.
Repro repo: here. The text was updated successfully, but these errors were encountered:. Could you share your user setting java. Setting it to true will force building the workspace before launching java program. Sorry, something went wrong. No clue about the cause. Tried Java: Clean the Java language server workspace but problem persists. This is reproducible on two different Windows machines. Log files: logs. The repo here you provided is just some empty folders, not sure how to reproduce this issue.
Could you provide a sample project and detailed steps to reproduce this issue? What is your workspace root when you open the folder in VS Code? Ask Question. Asked 11 years, 11 months ago. Active 3 years, 6 months ago. Viewed 33k times. So, how can I generate the class file again?
Thank you in advance for any help. Roman Roman k gold badges silver badges bronze badges. Add a comment. Active Oldest Votes. Cleaning the project should be enough to start the build. Thomas Jung Thomas Jung But how can I "clean" the project? If Build Automatically is disabled, the Clean dialog has an option selected by default to start a build after the clean anyway at least in 3. Ash, in my case the "Build Automatically" is not disabled.
Should I disable it? Where can I find the clean dialog? How can I initiate the clean? To simplify this example, delete the Global.
This is only done in this example to prevent additional errors that are related to the code-behind page of the Global. Because you want the code-behind class file for this sample to compile on demand, do not build the solution now.
If you followed the steps that are listed in the Use the Inherits attribute with precompiled classes section, you must delete the assembly in the Bin directory of the application before you follow the rest of the steps in this section. For more information, visit the Troubleshooting section of this article. Otherwise, if you are using Visual Studio.
NET , the code-behind page will be precompiled into an assembly that is located in the Bin directory by default. After viewing the page, you will receive an error message that is similar as below:. This error occurs because the code-behind class file is not yet compiled, and you have not yet included the Src attribute to reference the code-behind class file. The Src attribute is listed with the relative path of the code-behind class file SrcSample.
Remember, do not build the solution because you want the code-behind class file for this sample to be compiled on demand. At this point, the page should be loaded in the browser, and the label is populated with the following value:. You may receive an error message that is similar to the following if you precompile your application in Visual Studio.
NET and then try to apply the compile on demand approach by using the Src attribute:. Keep in mind that the directory names following YourProjectName in the path that is listed in the error message will probably be different because ASP.
NET automatically handles the building of the directories and their names. If you use the Src attribute, you must follow these steps to resolve the issue that is associated with the error message:. Delete the YourProjectName directory that is referenced in the error message. You may also have to run the iisreset command from the command prompt before you complete this step. Otherwise, you may receive the following error message:.
Cannot delete GeneratedName. Make sure the disk is not full or write-protected and that the file is not currently in use. Otherwise, if you use Visual Studio. Microsoft recommends that you use the precompiled approach instead of the compile on demand method by using the Src attribute if you develop your applications with Visual Studio.
NET to avoid these types of issues. If you want to or if you must contain your Web Form pages in a single file, develop your. For more information about how to develop single-file Web Forms in Visual Studio. If you do not precompile the code-behind class file and if you do not add the Src attribute to the Page directive, or if the virtual path for the attribute is not correct, you will receive the following error message:.
When you deploy. You do not have to deploy the actual code-behind class files with the application. Additionally, you must add the Src attribute to the Page directive because the class file must be available when it is compiled on demand. For more information about assemblies, see Assemblies. For more articles, samples, and other resources that are related to ASP.
For more information about the Page directive and its various attributes, see Page.
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