OOPS in JAVA #1 👍👍🌟🌟 (Basic structure of objects & classes)

class student{
    String name;
    private int roll;
    double percentage;
    private int year;

    public int getYear(){
        return year;
    }
    public void setYear(int yr){
        year=yr;
    }

    public int getRoll(){//getter
        return roll;
    }
    public void setRoll(int rolll){
        roll=rolll;//setter
    }

}


 class cars{
    String cname;
    String type;
    int model;
}
public class class_student {


    static void cardetails(cars x){
        System.out.println(x.cname);
        System.out.println(x.model);
    }
    //methods for printing all attributes of class
    static void studentdetails(student x){
         System.out.println("NAME : "+x.name);
//         System.out.println("roll no. : "+x.roll);
        System.out.println("Roll no : "+x.getRoll());//getter
         System.out.println("percentage : "+x.percentage);
        System.out.println("Year : "+x.getYear());
         //classes are pass by reference
//        System.out.println(x.name);
//         x.name="naman";
     }

    public static void main(String[] args) {
//      object ( creation)  declaration
     student himanshu=new student();

        himanshu.name="Himanshu";
//     himanshu.roll=25;
        himanshu.setRoll(25);
        himanshu.percentage=78;
        himanshu.setYear(2022);
        
        studentdetails(himanshu);

     cars scorpio=new cars();

     scorpio.cname="Scorpio";
     scorpio.type="SUV";
     scorpio.model=2018;

//        System.out.println(himanshu.name);
//        System.out.println(himanshu.roll);
//        System.out.println(himanshu.percentage);


    }

}