If you are receiving the message “{HelloWorld.java is a non-project file, only syntax errors are reported,” it means that you are trying to compile or run the file “HelloWorld.java” outside of a Java project setup.
To fix this issue, you can follow these steps:
- Create a new directory for your Java project.
- Move the “HelloWorld.java” file into this newly created directory.
- Open a command prompt or terminal and navigate to the directory where your Java project is located.
- Compile the “HelloWorld.java” file using the
javaccommand:javac HelloWorld.java - If there are no syntax errors in your code, a new bytecode file named “HelloWorld.class” should be generated.
- Run the compiled Java program using the
javacommand:java HelloWorld
Make sure that you have Java Development Kit (JDK) installed on your system and its path correctly configured so that you can use the javac and java commands.
By following these steps, you should be able to compile and run your “HelloWorld.java” file without encountering any non-project file errors.
内容由零声教学AI助手提供，问题来源于学员提问
![local s = ""
local sstr = string.gmatch(s,'href%s*=%s*"([^"]+)"')
print(sstr()) 增加一个功能，左右两边可以是双引号或者单引号](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162224299866311.png)
![local s = ""
local sstr = string.gmatch(s, 'href%s*=%s*["\']([^"\']+)[\'"]')
print(sstr()) 增加一个功能，开头可以是href、src、action](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162217558813401.png)
