how to use the ApplicationArguments in spring-boot

Question

I am learning the Spring-Boot(I am new to it), reading the Spring Boot Document. In the 23.6 Accessing application arguments, It talk about the ApplicationArguments, and the code is:

package com.example.project;

import org.springframework.boot.*;
import org.springframework.beans.factory.annotation.*;
import org.springframework.stereotype.*;

import java.util.*;

@Component
public class MyBean {
  @Autowired
  public MyBean(ApplicationArguments args) {
    boolean debug = args.containsOption("debug");
    List<String> files = args.getNonOptionArgs();
    System.out.println(debug);
    System.out.println(files);
  }
}

It says if run with "--debug logfile.txt" debug=true, files=["logfile.txt"].

But in my project, I don't know how to run it. I create the spring-boot using Maven: The Project Structure

Answer 1

In Spring Boot doc ApplicationArguments is autowired in a bean. Here is a more hands on example where it's used in a Main method.

import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application implements ApplicationRunner {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args).stop();
    }

    @Override
    public void run(ApplicationArguments args) throws Exception {
        boolean debug = args.containsOption("debug");
        List<String> files = args.getNonOptionArgs();
        System.out.println(debug);
        System.out.println(files);
    }
}

Answer 2

Assuming that you have an Application class with annotation @SpringBootApplication like in the answer provided by a.b.d.

To be able to provide the arguments within IntelliJ IDEA environment you will need to first Run the main method and then Edit 'Run/Debug Configurations' and under Main Class fill Program arguments field with "--debug logfile.txt":