Solution of the previous problem, this keyword to refer current class instance variable

Java Programming Language / Class, Object and Methods in java

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Program:

 //Solution of the previous problem by this keyword

class StudentClass{
int rollno;
String name;
float age;

StudentClass(int rollno,String name,float age){
this.rollno=rollno;
this.name=name;
this.age=age;
}

void display(){
	System.out.println(rollno+" "+name+" "+age);
   }
}


class MainStudentClass{
public static void main(String args[]){

	StudentClass s1=new StudentClass(1,"Rahim",21.0f);
	StudentClass s2=new StudentClass(2,"Ram",21.5f);
	s1.display();
	s2.display();
 }
}

/*

The this keyword can be used to refer current class
instance variable. If there is ambiguity between the
instance variables and parameters, this keyword resolves
the problem of ambiguity.

In the previous example, parameters (formal arguments) and instance
variables are same. So, we are using this keyword to distinguish
local variable and instance variable.

*/

Output:

1 Rahim 21.0
2 Ram 21.5
Press any key to continue . . .

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