the reference answer GPT ᴼ ᴾ ᴱ ᴺ ᴬ ᴵ < br / > 1, no configuration JDK or JDK configuration is not correct.
In IDEA you need to configure the JDK to ensure that you can compile and run the program correctly. You can configure the JDK in the Project Structure option in the Settings/Preferences of IDEA. If the JDK is not installed, download and install it first. If the JDK has already been installed, you can configure the path to the JDK in your system environment variables.
2. The output path of the project is not configured.
In IDEA you need to configure the output path of the project to ensure that the compiled code is generated correctly. The output path can be configured in the Compiler option in the Build, Execution, Deployment options in the Settings/Preferences of the IDEA.
3. The code has syntax errors or logical errors.
If the code has syntax or logic errors, the program will not compile or run. You need to double-check the code to make sure it's correct.
4. The running configuration is incorrect.
Verify that the running configuration is correct, including selecting the correct module and configuring the correct startup parameters.
5. The project dependency is incorrect.
If your code depends on some library or framework, you need to verify that the dependencies are correct. You can configure Project dependencies in the Libraries option in the Project Structure option of IDEA.
If none of the above works, try reinstalling IDEA and running the Hello World program with the default Settings. If it still doesn't work, contact the IDEA support team or search the relevant forums and communities for help.