tell me whats happened here?

//bro use this
package com.codegym.task.task06.task0617;

/*
Notepad for new ideas

*/

public class Solution {
    public static void main(String[] args) {
        printIdea(new Idea());
    }

    public static class Idea {
        public String satya = "dhvfgr";
        public String getDescription() {
            return satya;
        }
    }

    public static void printIdea(Idea idea) {
        System.out.println(idea.getDescription());
    }
}

printIdea(Idea idea) is not a method of solution class. getDescription() is not meant to accept param.This should be like

public String getDescription(){
            return "Description";
        }

You do not need to change the main() method. printIdea(Idea idea) this method accept the Idea as param so as Idea is a static class so use dot operator to call getDescription() Method like

System.out.println(idea.getDescription());

. printIdea() should be static as per requirements of the problem. I think this may help you.

requirement states: u dont have to create object of Idea class at line 10. just re-write the line 10, 11 with printIdea(Idea idea); rest everything will work fine

printIdea is a static method. It is not a method of Idea class.

Idea class doesn't have printIdea method (line #11)