Solution to the main method of idea running java project report build failure error

introduction

When you run a Java project's main method using IntelliJ IDEA, you encounter a "Build Failure" error, which usually means you have encountered problems during the project's build process. Solving this type of problem usually requires systematic inspection and adjustment of project settings, code, dependencies and other aspects. Here are some detailed solutions, as well as a simple code example to show how to ensure that a Java program can be built and run successfully.

1. Method 1: Solve Steps

1) Check the project structure

Make sure our project is structured correctly, especiallysrcDirectory andmainIs the class file path where the method is located correct? Usually, the source code of Java projects should be placed insrc/main/javaIn the directory.

(2) Check the compiled output path

Make sure that the compile output path of IntelliJ IDEA is set correctly. We can check and modify it through the following steps:

OpenFile -> Project Structure。
existProjectIn the tab, checkProject compiler outputIs the path correct?
existModulesIn the tab, make sureSourcesandPathsThe settings are correct, especiallySourcesUnder the tagOutput path。

(3) Cleaning and rebuilding projects

Sometimes, project cache or old compiled output can cause problems. We can clean up and rebuild the project through the following steps:

OpenBuild -> Clean Project。
When finished, openBuild -> Rebuild Project。

(4) Check dependencies

If our project depends on external libraries or modules, make sure that these dependencies are correctly added to the project. For Maven or Gradle projects, checkorWhether the dependencies in the file are complete and version compatible.

(5) Check the JDK version

Make sure the JDK version we are using is compatible with the project. We can check and modify the JDK version through the following steps:

OpenFile -> Project Structure。
existProjectIn the tab, checkProject SDKWhether the settings are correct.
existModulesIn the tab, check theLanguage levelWhether it matches the JDK version.

(6) View the error log

Check the IntelliJ IDEA build log to find out the specific error information. This can help us locate the problem more accurately. We can view the build log in the following steps:

OpenView -> Tool Windows -> Build。
View error messages in the build log and fix them according to the error prompts.

(7) Disable plug-ins that are not commonly used

Sometimes, some plugins can cause build failures. We can try to disable some plugins that are not commonly used and then rebuild the project.

(8) Re-import the project

If none of the above methods work, you can try to re-import the project. Close IntelliJ IDEA and delete the project directory.ideaFolders and*.imlFile, then reopen IntelliJ IDEA and reimport the project.

(9) Code Example

Here is a simple Java program example that can be successfully built and run in a properly set project:

// File path: src/main/java/public class HelloWorld {  
    public static void main(String[] args) {  
        ("Hello, World!");  
    }  
}

Make sure our project is structured correctly and that the above files are located insrc/main/javaIn the directory. Then, follow the steps above to check and set up our project to make sure it can be built and run successfully.

In addition to the previously mentioned workaround, you can try the following solutions for the "Build Failure" error encountered when running a Java project in IntelliJ IDEA:

2. Check and update the Maven or Gradle configuration

If our project uses Maven or Gradle as a build tool, make sureorThe configuration in the file is correct. This includes the dependency version, plug-in configuration, etc. Sometimes, conflicts between dependencies or outdated plugin versions can cause build failures.

Maven:examineWhether there are missing dependencies or incorrect plug-in configurations in the file.
Gradle:examineAre there any similar problems in the file and make sure that the Gradle version is compatible with the project.

3. Check for errors in the code

While "Build Failure" is often related to project configuration or environment issues, sometimes errors in the code can cause build failures. Check for any syntax errors, type mismatch, unresolved references, etc.

Use IntelliJ IDEA's code checking feature to find potential errors.
Check out the specific error message in the build log to determine which file or piece of code is causing the problem.

4. Clean and update IntelliJ IDEA's cache

IntelliJ IDEA caches some project information for performance, but sometimes these caches can become obsolete or corrupt, causing build failure.

We can passFile -> Invalidate Caches / Restart...To clean the cache and restart IntelliJ IDEA.
In the dialog box that pops up, selectInvalidate and RestartTo clean the cache and restart the IDE.

5. Check environment variables

Ensure environment variables (such asJAVA_HOME、MAVEN_HOME、GRADLE_HOMEetc.) Set up correctly and points to the correct JDK, Maven, or Gradle installation directory.

On Windows, we can useSystem Properties -> advanced -> Environment variablesTo check and modify environment variables.
On macOS or Linux, we can edit shell configuration files (e.g..bash_profile、.zshrcetc.) to set environment variables.

6. Try to build on different machines or environments

If possible, try to build our project in a different machine or environment. This helps determine if the problem is caused by a specific hardware, operating system, or software configuration.

7. Check official documents and community forums

If none of the above methods can solve the problem, it is recommended to consult the official documents of IntelliJ IDEA or the relevant community forum. These resources usually contain detailed information about common problems and solutions.

8. Conclusion

Resolving "Build Failure" errors usually requires careful inspection and adjustment of multiple aspects of the project, including project structure, compiled output paths, dependencies, JDK versions, etc. By following the above steps, we should be able to locate and resolve most build failures. If the problem persists, it is recommended to view a more detailed error log or seek help from the community or experts.

The above is the detailed solution to the main method of the idea to report the build failure error when the idea runs the Java project. For more information about the idea runs the Java project, please follow my other related articles!