Inheritance

Main.java

class Main{
	public static void main(String[] a){
		Student s1 = new Student();
		s1.setRollNumber(1);
		s1.setName("Anuj");
		s1.setAge(21);
		System.out.println("RollNUmber: "+s1.getRollNumber()+"\tName : "+s1.getName()+"\tAge : "+s1.getAge());
	}
}

Person.java

class Person{
	private int age;
	private String name;
	public void setName(String name){
		this.name = name;
	}
	public void setAge(int age){
		this.age = age;
	}
	public int getAge(){
		return(age);
	}
	public String getName(){
		return(name);
	}
}

Student.java

class Student extends Person{
	private int rollNumber;
	public void setRollNumber(int rollNumber){
		this.rollNumber = rollNumber;
	}
	public int getRollNumber(){
		return(rollNumber);
	}
}