For example, I want to know this SpringBootApplication class belongs to which JAR or dependency :

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringBootWebApplication {
	public static void main(String[] args) throws Exception {
		SpringApplication.run(SpringBootWebApplication.class, args);

Solution

In Eclipse IDE, double clicks on the class name, press CTRL + SHIFT + T (win/*nix) or CMD + SHIFT + T (mac) to prompt out a small “Open Type” window about the class detail :

References

1. IntelliJ IDEA – How to know this class belongs to which JAR