Example problem using 'this'

Tried working out an exercise question from a tutorial book im reading and one of the questions was :
Create a class with two methods. Within the first method,
call the second method twice: the first time without using this, and the
second time using this—just to see it working
Read through alot of how to use this but not entirely sure how id call a method using this from the same method
as i called it regularly from .

Sample code that would do same is :-
class Try1{
public void a()
          System.out.println("In A");
          b();
          this.b();
     public void b(){
          System.out.println("In B ");
     public static void main(String [] args){
          Try1 t = new Try1();
          t.a();
Output :-
java Try1In A
In B
In B

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