class Student2{
 int rollno;
 String name;
 
 void insertRecord(int r, String n){  //method
  rollno=r;
  name=n;
 }
 
 void displayInformation(){System.out.println(rollno+" "+name);}//method
 
 public static void main(String args[]){
  Student2 s1=new Student2();
  Student2 s2=new Student2();
 
  s1.insertRecord(534,"abhishek");
  s2.insertRecord(1,"sai");
 
  s1.displayInformation();
  s2.displayInformation();
 
 }
}


OUTPUT:
534 abhishek
1 sai

Simple Example of Object and Class

class Student1{
 int id;                                             //data member (also instance variable)
 String name;                                 //data member(also instance variable)
 
 public static void main(String args[ ])
{
  Student1 s1=new Student1();           //creating an object of Student
  System.out.println(s1.id);
  System.out.println(s1.name);
 }
}

OUTPUT: 0 null

HELLO WORLD

class HelloJava
{
    public static void main(String args[])
{
      System.out.println("Hello Java");
    }
}

Input: empty

output : Hello Java