import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".

  class Students {    // this is our custom class 
       int id;
       String name;
      
    
    // we create a new method in class
      
      public void Printdetails(){
          
          System.out.println("My id num is "+ id);
          System.out.println("My name is "+ name);
        

      }
      
      
  }
public class Main {

    public static void main(String[] args) {
        System.out.println("Hello world!");
     
        Students raju = new Students (); // theese are object 
        Students vishu = new Students ();// we can create unlimited object,
                                 // in a class
        Students vikas = new Students();
     
       // attributes means students ki properties kya h
         vishu.id = 01;
         vishu.name = "vishal singh";
         raju.id= 03;
         raju.name="raj nagar";
         vikas.id = 123;
        
        
         
       // we cannot print like this
       //  System.out.println(vishu.id);
 
        // use method
        
         vishu.Printdetails();
         raju.Printdetails();
         vikas.Printdetails();

    }
}