PersonStudent.java

public class Person {
 String name;
 Person(String name)
 {
 this.name=name;
 }
}
class Student extends Person
{
 String CollegeName;

 public Student(String name, String CollegeName) {
 super(name);
 this.CollegeName = CollegeName;
 }
}
class Teacher extends Person
{
 int salary;
 String subject;

 public Teacher(String name,int salary, String subject) {
 super(name);
 this.salary = salary;
 this.subject = subject;
 }
 void display()
 {
 System.out.println(name+" "+salary+" "+subject);
 }
}
class CollegeStudent extends Student
{
 int year;String major;

 public CollegeStudent(String name, String collegeName, int year, String major) {
 super(name, collegeName);
 this.year = year;
 this.major = major;
 }
 void display()
 {
 System.out.println(name+" "+CollegeName+" "+year+" "+major);
 }
}
class PersonStudent
{
 public static void main(String[] args) {
 CollegeStudent obj1=new CollegeStudent("Mradul","GLA",2,"CS");
 Teacher obj2=new Teacher("Neeraj",200000,"OOP");
 obj1.display();
 obj2.display();
 }
}