Example of this Pointer in Java

class superclass 
            { 
                String s= "This is the super class"; 
                void display(String s) 
                   { 
                       System.out.println("Superclass Message: "+s); 
                   } 
            } 
                    class subclass extends superclass 
                      { 
                          String s = "This is the sub class"; 
                          public static void main(String[] args) 
                               { 
                                  new subclass(); 
                               } 
                                   void display(String s) 
                              { 
                                          System.out.println("Sublass message: "+s); 
                                      } 
                                  subclass() 
                                    { 
                                        display(this.s); 
                                                display(super.s); 
                                                this.display(s); 
                                        super.display(s); 
                                    } 
                      }