this_keyword.java

package NPTEL1;
//class student
class Student{
	int roll_no;
	String name,course;
	float fee;
	//constructor including three arguments
	Student(int roll_no,String name,String course){
		this.roll_no=roll_no;
		this.name=name;
		this.course=course;
		
	}
	//constructor including one more argument 'fee'
	Student(int roll_no,String name, String course,float fee){
		//for reusing the any constructor in other constructor  
		this(roll_no,name,course);//reusing the above constructor  
		this.fee=fee;// here the fee with this belong to the student class 
	}
	// method to display 
	void display() {
		System.out.println(roll_no+" "+name+" "+course+" "+fee);
	}
}
//main class 
public class this_keyword {
	public static void main (String[]args ) {
		//objects initialized by two different 
		Student s1=new Student(05,"akash","java");
	    Student s2=new Student(15,"raju","c++",5000f);
	    //calling display method 
        s1.display();
        s2.display();
	    
	}

}